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Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Oct. 02, 2015	Nov. 20, 2015	Apr. 03, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Oct. 02, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	MTSI
Entity Registrant Name	M/A-COM Technology Solutions Holdings, Inc.
Entity Central Index Key	0001493594
Current Fiscal Year End Date	--10-02
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		53,073,246
Entity Public Float			$ 869.7

Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Current assets:
Cash and cash equivalents	$ 122,312	$ 173,895
Short term investments	39,557
Accounts receivable, net	83,950	62,258
Inventories	79,943	71,481
Deferred income taxes	31,431	35,957
Prepaids and other current assets	27,026	14,769
Current assets, discontinued operations		14,989
Total current assets	384,219	373,349
Property and equipment, net	83,759	50,052
Goodwill	93,346	10,784
Intangible assets, net	243,666	142,633
Deferred income taxes	48,239	84,629
Other long-term assets	13,022	20,232
Other assets, discontinued operations		555
Total assets	866,251	682,234
Current liabilities:
Current portion long-term debt	4,058	3,478
Accounts payable	29,311	22,528
Accrued liabilities	37,599	33,596
Income taxes payable	508	865
Deferred revenue		17,258
Other current liabilities, discontinued operations		7,921
Total current liabilities	71,476	85,646
Long-term debt, less current portion	340,504	343,178
Warrant liability	21,822	15,801
Other long-term liabilities	7,916	9,042
Total liabilities	441,718	453,667
Commitments and contingencies (Notes 11)
Stockholders' equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, no shares issued
Common stock, $0.001 par value, 300,000 shares authorized; 52,958 and 47,548 shares issued and 52,933 and 47,525 shares outstanding as of October 2, 2015 and October 3, 2014, respectively, of which 11 and 59 shares, respectively, are subject to forfeiture	53	48
Accumulated other comprehensive loss	(2,279)	(1,354)
Additional paid-in capital	526,011	377,714
Treasury stock, at cost, 23 shares as of October 2, 2015 and October 3, 2014	(330)	(330)
Accumulated deficit	(98,922)	(147,511)
Total stockholders' equity	424,533	228,567
Total liabilities and stockholders' equity	$ 866,251	$ 682,234

Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 02, 2015	Oct. 03, 2014
Statement of Financial Position [Abstract]
Preferred stock, Par value	$ 0.001	$ 0.001
Preferred stock, Authorized	10,000,000	10,000,000
Preferred stock, Issued	0	0
Common stock, Par value	$ 0.001	$ 0.001
Common stock, Authorized	300,000,000	300,000,000
Common stock, Issued	52,958,000	47,548,000
Common stock, Outstanding	52,933,000	47,525,000
Common stock, Forfeiture	11,000	59,000
Treasury stock, Shares	23,000	23,000

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Income Statement [Abstract]
Revenue	$ 420,609	$ 339,189	$ 242,703
Cost of revenue	217,019	198,249	133,505
Gross profit	203,590	140,940	109,198
Operating expenses:
Research and development	82,188	71,351	42,505
Selling, general and administrative	110,030	82,593	57,930
Restructuring charges	1,280	14,823	1,060
Total operating expenses	193,498	168,767	101,495
Income (loss) from operations	10,092	(27,827)	7,703
Other (expense) income:
Warrant liability expense	(6,020)	(3,928)	(4,312)
Interest expense	(18,376)	(12,362)	(817)
Other (expense) income, net	(1,096)	3,217	372
Other (expense) income, net	(25,492)	(13,073)	(4,757)
(Loss) income before income taxes	(15,400)	(40,900)	2,946
Income tax (benefit) provision	(9,858)	(16,086)	283
(Loss) income from continuing operations	(5,542)	(24,814)	2,663
Income from discontinued operations, net of tax	54,131	9,491	15,533
Net income (loss)	$ 48,589	$ (15,323)	$ 18,196
Basic income (loss) per common share:
Income (loss) from continuing operations	$ (0.11)	$ (0.53)	$ 0.06
Income (loss) from discontinued operations	1.06	0.20	0.34
Net income (loss) - basic	0.95	(0.33)	0.40
Diluted income (loss) per common share:
Income (loss) from continuing operations	(0.11)	(0.53)	0.06
Income (loss) from discontinued operations	1.06	0.20	0.33
Net income (loss) - diluted	$ 0.95	$ (0.33)	$ 0.39
Shares used to compute net income (loss) per common share:
Basic	51,146	47,009	45,916
Diluted	51,146	47,009	47,137

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]
Net income (loss)	$ 48,589	$ (15,323)	$ 18,196
Unrealized gain (loss) on short term investments, net of tax	(97)
Foreign currency translation gain (loss), net of tax	(918)	(1,097)	(30)
Other adjustments, net of tax	90	(90)
Other comprehensive income	(925)	(1,187)	(30)
Total comprehensive income (loss)	$ 47,664	$ (16,510)	$ 18,166

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Balance at Sep. 28, 2012	$ 210,455	$ 45	$ (685)	$ (137)	$ 361,616	$ (150,384)
Balance, Shares at Sep. 28, 2012		45,452	43
Capital contributions	8,435				8,435
Stock option exercises	605	$ 1			604
Stock option exercises, Shares		614
Vesting of restricted common stock and units, Shares		248
Issuance of common stock pursuant to employee stock purchase plan	1,281				1,281
Issuance of common stock pursuant to employee stock purchase plan, Shares		131
Shares repurchased for tax withholdings on stock awards	(77)		$ (77)
Shares repurchased for tax withholdings on stock awards, shares			6
Retirement of treasury stock			$ 432		(432)
Retirement of treasury stock, Shares		(26)	(26)
Share-based and other incentive compensation	6,096				6,096
Excess tax benefits	2,180				2,180
Other comprehensive income	(30)			(30)
Net income (loss)	18,196					18,196
Balance at Sep. 27, 2013	247,141	$ 46	$ (330)	(167)	379,780	(132,188)
Balance, Shares at Sep. 27, 2013		46,419	23
Capital contributions	3,200				3,200
Common control business combination	(26,080)				(26,080)
Common control tax benefits	6,069				6,069
Stock option exercises	2,219	$ 1			2,218
Stock option exercises, Shares		515
Vesting of restricted common stock and units	1	$ 1
Vesting of restricted common stock and units, Shares		536
Issuance of common stock pursuant to employee stock purchase plan	1,810				1,810
Issuance of common stock pursuant to employee stock purchase plan, Shares		150
Shares repurchased for tax withholdings on stock awards	(1,282)				(1,282)
Shares repurchased for tax withholdings on stock awards, shares		72
Share-based and other incentive compensation	11,277				11,277
Fair value of vested awards assumed in acquisition	785				785
Excess tax benefits	(63)				(63)
Other comprehensive income	(1,187)			(1,187)
Net income (loss)	(15,323)					(15,323)
Balance at Oct. 03, 2014	228,567	$ 48	$ (330)	(1,354)	377,714	(147,511)
Balance, Shares at Oct. 03, 2014		47,548	23
Common stock issued, net of issuance costs	127,761	$ 5			127,756
Common stock issued, net of issuance costs, shares		4,500
Stock option exercises	$ 2,613				2,613
Stock option exercises, Shares	288	288
Vesting of restricted common stock and units	$ 1	$ 1
Vesting of restricted common stock and units, Shares		704
Issuance of common stock pursuant to employee stock purchase plan	2,838				2,838
Issuance of common stock pursuant to employee stock purchase plan, Shares		176
Shares repurchased for tax withholdings on stock awards	(8,556)	$ (1)			(8,555)
Shares repurchased for tax withholdings on stock awards, shares		258
Share-based and other incentive compensation	20,655				20,655
Excess tax benefits	2,990				2,990
Other comprehensive income	(925)			(925)
Net income (loss)	48,589					48,589
Balance at Oct. 02, 2015	$ 424,533	$ 53	$ (330)	$ (2,279)	$ 526,011	$ (98,922)
Balance, Shares at Oct. 02, 2015		52,958	23

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 48,589	$ (15,323)	$ 18,196
Adjustments to reconcile net income(loss) to net cash from operating activities (net of acquisition):
Depreciation and intangible amortization	54,708	34,618	14,822
Stock-based and other noncash incentive compensation	19,435	11,277	6,096
Warrant liability expense	6,020	3,928	4,312
Acquired inventory step-up amortization	5,533	18,053
Deferred financing costs amortization and write-offs	1,651	3,021	321
Gain on disposition of business	(63,256)
Impairment of minority equity investment	3,500
Acquisition prepaid compensation amortization	9,623
Deferred income taxes	7,835	(13,328)	(4,650)
Other adjustments	740	186	(530)
Change in operating assets and liabilities (net of acquisition):
Accounts receivable	(13,089)	2,223	(8,495)
Inventories	92	(9,586)	3,368
Prepaid expenses and other assets	3,932	(646)	(4,753)
Prepaid compensation	(14,586)
Accounts payable	(1,858)	(7,140)	(3,642)
Accrued and other liabilities	(5,640)	(6,726)	4,337
Income taxes	(12,512)	(2,656)	3,714
Deferred revenue	(17,039)	7,571	1,135
Payment of contingent consideration			(5,328)
Net cash from operating activities	33,678	25,472	28,903
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(38,252)	(16,973)	(12,336)
Strategic investments	1,500	(5,250)
Purchase of short-term investments	(40,183)
Acquisition of intellectual property	(3,346)	(5,490)	(897)
Acquisition of businesses, net	(208,352)	(260,875)
Sale of product line		12,000
Sale of businesses	81,208	12,345
Net cash used in investing activities	(207,425)	(264,243)	(13,233)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from stock offering, net of issuance costs of $827	127,761
Borrowings from revolving credit facility	100,000	245,000
Payments on revolving credit facility	(100,000)	(245,000)
Borrowings from notes payable		350,000
Payments on notes payable	(3,500)	(3,500)
Payments of assumed debt	(1,504)	(40,917)
Repurchase of common stock	(8,626)	(1,282)	(77)
Proceeds from stock option exercises and employee stock purchases	5,450	4,028	1,886
Capital contributions		3,200	8,435
Other adjustments	2,826	(9,169)	(26)
Net cash from financing activities	122,407	302,360	10,218
Effect of exchange rate changes on cash and cash equivalents	(243)	(182)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(51,583)	63,407	25,888
CASH AND CASH EQUIVALENTS - Beginning of year	173,895	110,488	84,600
CASH AND CASH EQUIVALENTS - End of year	$ 122,312	$ 173,895	$ 110,488

Consolidated Statements of Cash Flows (Parenthetical) $ in Thousands	12 Months Ended
	Oct. 02, 2015 USD ($)
Statement of Cash Flows [Abstract]
Stock offering issuance costs, net	$ 827

Description of Business	12 Months Ended
Description of Business	Oct. 02, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	1. DESCRIPTION OF BUSINESS M/A-COM Technology Solutions Holdings, Inc. (the Company) was incorporated in Delaware on March 25, 2009. We are a leading provider of high-performance analog semiconductor solutions that enable the next-generation internet applications, the cloud connected apps economy, and the modern, networked battlefield across the radio frequency (RF), microwave, and millimeterwave spectrum. We design and manufacture differentiated, high-value products for customers who demand high performance, quality, and reliability.

Summary of Significant Accounting Policies

12 Months Ended

Oct. 02, 2015

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation, Basis of Presentation and Reclassification—We have one reportable segment, semiconductors and modules. The accompanying consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Certain prior period financial statement amounts, including Automotive business discontinued operations have been adjusted to conform to current reported presentations.

We have a 52 or 53-week fiscal year ending on the Friday closest to the last day of September. The fiscal year 2015 includes 52 weeks, fiscal year 2014 included 53 weeks and fiscal year 2013 included 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in our fiscal years in the first quarter.

Use of Estimates—The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information, and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions.

Discontinued Operations—In the fourth quarter of fiscal year 2015, we divested our Automotive business. In the second quarter of fiscal year 2014, we sold assets of the non-core wireless business of Mindspeed. The operating results of these businesses are reflected in discontinued operations.

Foreign Currency Translation and Remeasurement—Our consolidated financial statements are presented in U.S. dollars. While the majority of our foreign operations use the U.S. dollar as the functional currency, the financial statements of our foreign operations for which the functional currency is not the U.S. dollar are translated into U.S. dollars at the exchange rates in effect at the balance sheet dates (for assets and liabilities) and at average exchange rates (for revenue and expenses). The unrealized translation gains and losses on the net investment in these foreign operations are accumulated as a component of other comprehensive income (loss).

The financial statements of our foreign operations where the functional currency is the U.S. dollar, but where the underlying transactions are transacted in a different currency, are remeasured at the exchange rate in effect at the balance sheet date with respect to monetary assets and liabilities. Nonmonetary assets and liabilities, such as inventories and property and equipment, and related statements of operations accounts, such as cost of revenue and depreciation, are remeasured at historical exchange rates. Revenue and expenses, other than cost of revenue, amortization and depreciation, are translated at the average exchange rate for the period in which the transaction occurred. The net gains and losses on foreign currency remeasurement are reflected in selling, general and administrative expense in the accompanying consolidated statements of operations. Net foreign exchange gains and losses for all periods presented were immaterial.

Cash and Cash Equivalents—Cash equivalents are primarily composed of short-term, highly-liquid instruments with an original maturity of three months or less.

Investments—We classify our investments as available-for-sale. Our investments classified as available-for-sale are recorded at fair value based upon quoted market prices at period end. Unrealized gains and losses that are deemed temporary in nature are recorded in accumulated other comprehensive income and loss as a separate component of stockholders’ equity.

A decline in the fair value of any security below cost that is deemed other than temporary results in a charge to earnings and the corresponding establishment of a new cost basis for the security. Premiums and discounts are amortized (accreted) over the life of the related security as an adjustment to its yield. Dividend and interest income are recognized when earned. Realized gains and losses are included in earnings and are derived using the specific identification method for determining the cost of investments sold.

Inventories—Inventories are stated at the lower of cost or market. We use a combination of standard cost and moving weighted-average cost methodologies to determine the cost basis for our inventories, approximating a first-in, first-out basis. The standard cost of finished goods and work-in-process inventory is composed of material, labor and manufacturing overhead, which approximates actual cost. In addition to stating inventory at the lower of cost or market, we also evaluate inventory each reporting period for excess quantities and obsolescence, establishing reserves when necessary based upon historical experience, assessment of economic conditions and expected demand. Once recorded, these reserves are considered permanent adjustments to the carrying value of inventory.

Property and Equipment—Property and equipment are stated at cost, less accumulated depreciation and amortization. Expenditures for maintenance and repairs are charged to expense as incurred, whereas major improvements that significantly extend the useful life of the assets are capitalized as additions to property and equipment.

Property and equipment are depreciated or amortized using the straight-line method over the following estimated useful lives:


Asset Classification		Estimated Useful Life In Years
Buildings and improvements		40
Machinery and equipment		2 – 7
Computer equipment and software		2 – 5
Furniture and fixtures		7 – 10
Leasehold improvements		Shorter of useful life or term of lease

Goodwill and Indefinite-lived Intangible Assets—We have goodwill and certain intangible assets with indefinite-lives which are not subject to amortization; these are reviewed for impairment annually during our fiscal fourth quarter and more frequently if events or changes in circumstances indicate that the assets may be impaired. For our assessment of goodwill impairment we compare the carrying value of the reporting unit to the fair value of the Company. If impairment exists, a loss would be recorded to write down the value of the indefinite-lived assets to their implied fair values. There have been no impairments of goodwill or indefinite-lived intangible assets in any period presented through October 2, 2015.

Other Intangible Assets—Our other intangible assets, including acquired technology and customer relationships, are definite-lived assets and are subject to amortization. We amortize definite-lived assets over their estimated useful lives, which range from five to ten years, generally based on the pattern over which we expect to receive the economic benefit from these assets.

Impairment of Long-Lived Assets—Long-lived assets include property and equipment and definite-lived intangible assets subject to amortization. We evaluate long-lived assets for recoverability when events or changes in circumstances indicate that their carrying amounts may not be recoverable. Circumstances which could trigger a review include, but are not limited to, significant decreases in the market price of the asset or asset group, significant adverse changes in the business climate or legal factors, the accumulation of costs significantly in excess of the amount originally expected for the acquisition or construction of the asset, current period cash flow or operating losses combined with a history of losses or a forecast of continuing losses associated with the use of the asset and a current expectation that the asset will more likely than not, be sold or disposed of significantly before the end of its previously estimated useful life.

In evaluating a long-lived asset for recoverability, we estimate the undiscounted cash flows expected to result from our use and eventual disposition of the asset. If the sum of the expected undiscounted cash flows is less than the carrying amount of the asset, an impairment loss, equal to the excess of the carrying amount over the fair value of the asset, is recognized. There were no impairments of long-lived assets in any period presented. Intangible assets related to in-process research and development acquired are not amortized until the underlying asset begins revenue generating activity, at which time it is amortized over its estimated useful life. Intangibles related to abandoned in-process research and development projects are expensed in the period the project is abandoned.

Revenue Recognition—We recognize revenue when: (i) persuasive evidence of an arrangement exists; (ii) delivery or services have been rendered; (iii) the price is fixed or determinable; and (iv) collectability is reasonably assured. We recognize revenue with the transfer of title and risk of loss and provide for reserves for returns and other allowances.

We generally do not provide customers other than distributors the right to return product, with the exception of warranty related matters. Accordingly, we do not typically maintain a reserve for customers. Shipping and handling fees billed to customers are recorded as revenue while the related costs are classified as a component cost of revenue. We provide warranties for certain products and accrue the costs of warranty claims in the period the related revenue is recorded.

Prior to fiscal 2015, we had concluded that we had insufficient information as well as limited experience in estimating the effect of the right of distributors to return product and price protection and, accordingly, used the sell through approach of revenue recognition. Under this approach, we would recognize revenue from sales after the distributor resold the product to its end customer (the sell through basis). After concluding an extensive three year study of distributor related transactions, we completed an evaluation of our revenue recognition policy and concluded that it was more appropriate to recognize revenue to distributors at the time of shipment to the distributor (sell-in basis). We believe we now have sufficient data to predict future price adjustments from distributors and has a basis of being able to reasonably estimate these future price adjustments.

On a consolidated basis, revenue from distribution customers impacted by the change in estimate accounts for approximately 20-25% of total consolidated revenue. Certain agreements with distribution customers provide for rights of return and compensation credits until such time as our products are sold by the distributors to their end customers. We have agreements with some distribution customers for various programs, including compensation, volume-based pricing, obsolete inventory, new products and stock rotation. Sales to these distribution customers, as well as the existence of compensation programs, are in accordance with terms set forth in written agreements with these distribution customers. In general, credits allowed under these programs are capped based upon individual distributor agreements. We record charges associated with these programs as a reduction of revenue at the time of sale with a corresponding adjustment to accounts receivable based upon historical activity. Our policy is to use a 12 month rolling historical experience rate and an estimated general reserve percentage in order to estimate the necessary allowance to be recorded.

During the first fiscal quarter of 2015, we recorded corresponding adjustments related to this change in estimate to recognize previously deferred revenues. The net effect was an increase of $15.1 million, of which $12.4 million was from previously deferred revenue and $2.7 million was related to the change in distributor inventories. Additionally, we recognized the related deferred inventory costs of $4.7 million which resulted in a reduction to net loss of $8.5 million, or a reduction of $0.18 net loss per share when the change in estimate was recorded. The full year impact of this change in estimate resulted in additional revenue of $17.4 million and a net income of $7.7 million, or $0.15 earnings per share.

We also established a new reserve of $5.6 million during the first quarter of fiscal year 2015 which was increased to $6.0 million for the fiscal year ended October 2, 2015 related to future rebates and returns under various programs associated with our distributor agreements. The amount of this reserve is largely driven by the individual distribution agreements and our business strategy whereby we will invoice the distributor at “list price”. We expect to issue compensation credits consistent with the distributor agreements. The difference between the list price and distributor selling price will vary by product grouping consistent with historical trends and marketing strategies. Historically, 90 percent of the credits issued to distributors are based on “list price” credits and 10 percent of the credits were for product returns and stock rotation rights, based upon the 12 month rolling historical experience rate.

The table below shows the changes in gross and net distributor revenue and reserve balances associated with the change in estimate for the fiscal year ended October 2, 2015 (in thousands):


	Three Months Ended										Fiscal Year
	January 2, 2015		April 3, 2015		July 3, 2015			October 2, 2015			2015
Gross revenue effect of one-time change in estimate (1)	$	17,028	$	—	$	—		$	—		$	17,028
Gross revenue effect associated with change in estimate (2)		3,636		4,687		(1,687	)		(351	)		6,285

Total gross revenue resulting from change in estimate		20,664		4,687		(1,687	)		(351	)		23,313

Net revenue effect of one-time change in estimate (3)		12,457		—		—						12,457
Net revenue effect associated with change in estimate (4)		2,643		3,686		(1,296	)		(134	)		4,899

Total net revenue resulting from change in estimate		15,100		3,686		(1,296	)		(134	)		17,356

Reserve for future returns and credits (5)	$	5,564	$	1,001	$	(391	)	$	(217	)	$	5,957

(1)	This amount was recorded as deferred revenue as of October 3, 2014.

(2)	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.

(3)	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.

(4)	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.

(5)	This amount reflects the change in the revenue reserve for future returns and credits.

Accounts Receivable Allowances—The activity in our accounts receivable allowances which includes compensation credits, customer returns, doubtful accounts and other items are as follows (in thousands):


	Fiscal year
	2015			2014			2013
Beginning balance	$	725		$	514		$	834
Provisions (recoveries), net		5,056			250			(259	)
Charge-offs		(36	)		(39	)		(61	)

Ending balance	$	5,745		$	725		$	514

Includes compensation credits and customer returns allowance of $5.5 million, $0.4 million and $0.3 million for fiscal years 2015, 2014 and 2013, respectively. Includes allowance for doubtful accounts of $0.2 million for fiscal 2015, 2014 and 2013.

Research and Development Costs—Costs incurred in the research and development of products are expensed as incurred.

Income Taxes—Deferred tax assets and liabilities are recognized based on temporary differences between the financial reporting and income tax bases of assets and liabilities, using rates anticipated to be in effect when such temporary differences reverse. A valuation allowance against net deferred tax assets is required if, based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

We provide reserves for potential payments of tax to various tax authorities related to uncertain tax positions and other issues. Reserves are based on a determination of whether and how much of a tax benefit is taken by us in our tax filings or positions and that are more likely than not to be realized following an examination by taxing authorities. We recognize the financial statement benefit of an uncertain tax position only after considering the probability that a tax authority would sustain the position in an examination. For tax positions meeting a “more-likely-than-not” threshold, the amount recognized in the financial statements is the benefit expected to be realized upon settlement with the tax authority. For tax positions not meeting the threshold, no financial statement benefit is recognized. Potential interest and penalties associated with such uncertain tax positions are recorded as a component of income tax expense.

Nitronex elected, for U.S. income tax purposes, to be taxed as a limited-liability company. As such, for the periods prior to its acquisition by us, Nitronex’s federal and state income taxes are the responsibility of GaAs Labs and no provision for income taxes is recorded in the financial statements for such periods.

Earnings Per Share—Basic net income (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the period, excluding the dilutive effect of common stock equivalents. Diluted net income (loss) per share reflects the dilutive effect of common stock equivalents, such as stock options, warrants, and restricted stock units, using the treasury stock method.

Fair Value Measurements—Financial assets and liabilities are measured at fair value. Fair value is an exit price, representing the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, we group financial assets and liabilities in a three-tier fair value hierarchy, according to the inputs used in measuring fair value as follows: Level 1—observable inputs such as quoted prices in active markets for identical assets and liabilities; Level 2—inputs other than quoted prices in active markets that are observable either directly or indirectly, such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical assets and liabilities in markets that are not active, and model-based valuation techniques for which significant assumptions are observable in active markets; and Level 3—unobservable inputs for which there is little or no market data, requiring us to develop our own assumptions for model-based valuation techniques. This hierarchy requires us to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value.

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, and accrued liabilities approximate fair value due to the short-term nature of these assets and liabilities.

Contingent Consideration—We estimate and record at the acquisition date, the fair value of contingent consideration making up part of the purchase price consideration for acquisitions. Additionally, at each reporting period, we estimate the change in the fair value of contingent consideration, and any change in fair value is recognized in the consolidated statements of operations. We estimate the fair value of contingent consideration by discounting the associated expected cash flows, using a probability-weighted, discounted cash flow model. The estimate of the fair value of contingent consideration requires subjective assumptions to be made regarding future operating results, discount rates, and probabilities assigned to various potential operating result scenarios.

Share-Based Compensation—We account for all share-based compensation arrangements using the fair value method. We recognize compensation expense over the requisite service period of the award, which is generally the vesting period, using the straight-line method and providing that the minimum amount of compensation recorded is equal to the vested portion of the award. We record the expense in the consolidated statements of operations in the same manner in which the award recipients’ costs are classified. We use the Black-Scholes option-pricing model to estimate the fair value of stock options, inclusive of assumptions for risk-free interest rates, dividends, expected terms, and estimated volatility. We derive the risk-free interest rate assumption from the U.S. Treasury’s rates for U.S. Treasury zero-coupon bonds with maturities similar to the expected term of the award being valued. We base the assumed dividend yield on its expectation of not paying dividends in the foreseeable future. We calculate the weighted-average expected term of the options using the simplified method, which is a method of applying a formula that uses the vesting term and the contractual term to compute the expected term of a stock option. The decision to use the simplified method is based on a lack of relevant historical data, due to our limited operating experience. In addition, due to our limited historical data, we incorporate the historical volatility of comparable companies with publicly available share prices to determine estimated volatility. The accounting for stock options requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.

Guarantees and Indemnification Obligations—We enter into agreements in the ordinary course of business with, among others, customers, distributors, and original equipment manufacturers (OEM). Most of these agreements require us to indemnify the other party against third-party claims alleging that a Company product infringes a patent and/or copyright. Certain agreements in which we grant limited licenses to specific Company trademarks require us to indemnify the other party against third-party claims alleging that the use of the licensed trademark infringes a third-party trademark. Certain of these agreements require us to indemnify the other party against certain claims relating to property damage, personal injury, or the acts or omissions, its employees, agents, or representatives. In addition, from time to time, we have made certain guarantees in the form of warranties regarding the performance of Company products to customers.

We have agreements with certain vendors, creditors, lessors, and service providers pursuant to which we have agreed to indemnify the other party for specified matters, such as acts and omissions, its employees, agents, or representatives.

We have procurement or license agreements with respect to technology that are used in our products and agreements in which we obtain rights to a product from an OEM. Under some of these agreements, we have agreed to indemnify the supplier for certain claims that may be brought against such party with respect to our acts or omissions relating to the supplied products or technologies.

Our certificate of incorporation and agreements with certain of our directors and officers and certain of our subsidiaries’ directors and officers provide them indemnification rights, to the extent legally permissible, against liabilities incurred by them in connection with legal actions in which they may become involved by reason of their service as a director or officer. As a matter of practice, we have maintained director and officer liability insurance coverage, including coverage for directors and officers of acquired companies.

We have not experienced any losses related to these indemnification obligations in any period presented, and no claims with respect thereto were outstanding as of October 2, 2015. We do not expect significant claims related to these indemnification obligations and, consequently, have concluded that the fair value of these obligations is negligible. No liabilities related to indemnification liabilities have been established.

Recent Accounting Pronouncements—In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in ASU 2014-09 can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. On July 9, 2015, the FASB voted to defer the effective date by one year to interim and annual reporting periods beginning after December 15, 2017, and permitted early adoption of the standard, but not for periods beginning on or before the original effective date of December 15, 2016. We have not yet selected a transition method and are currently evaluating the impact of ASU 2014-09.

In June 2014, the FASB issued ASU 2014-12-Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (a consensus of the FASB Emerging Issues Task Force) which addresses how to account for share-based performance awards including determining rendering service on the date the performance target is achieved. We are currently evaluating the impact of ASU 2014-12, which is effective for annual periods and interim periods within those annual periods, beginning after December 15, 2015.

In February 2015, the FASB issued ASU 2015-02, Consolidation: Amendments to the Consolidation Analysis. ASU 2015-02 address concerns regarding the current accounting for consolidation of certain legal entities. A reporting entity may apply the amendments in this Update using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply the amendments retrospectively. We are currently evaluating the impact of ASU 2015-02, which is effective for us in our fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015.

In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. We are currently evaluating the impact which is effective for us in our fiscal years beginning after December 15, 2015, and interim periods within those fiscal years.

In August 2015, the FASB issued Accounting Standards Update 2015-15 (“ASU 2015-15”), “Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements.” ASU 2015-15 supplements the requirements of ASU 2015-03 by allowing an entity to defer and present debt issuance costs related to a line of credit arrangement as an asset and subsequently amortize the deferred costs ratably over the term of the line of credit arrangement. We are currently evaluating the impact and do not expect the adoption to have a material impact on our consolidated financial statements.

In September 2015, the FASB issued ASU 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments,” which eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Acquirers would now recognize measurement-period adjustments during the period in which they determine the amount of the adjustment. This ASU is effective for annual and interim reporting periods beginning after December 15, 2015, including interim periods within those fiscal years, and should be applied prospectively to adjustments for provisional amounts that occur after the effective date with early adoption permitted for financial statements that have not been issued. We do not expect the adoption to have a material impact on our consolidated financial statements.

Evaluation of Subsequent Events—Management has evaluated subsequent events for potential recognition or disclosure in the accompanying audited consolidated financial statements through the date of the issuance of the consolidated financial statements. Subsequent events are events or transactions that occurred after the balance sheet date but before the accompanying consolidated financial statements are issued. See Note 25 to the Consolidated Financial Statements.

Acquisitions

12 Months Ended

Oct. 02, 2015

Business Combinations [Abstract]

Acquisitions

3. ACQUISITIONS

Acquisition of BinOptics Corporation—On December 15, 2014, we completed the acquisition of BinOptics, a supplier of high-performance photonic semiconductor products. In accordance with the related Agreement and Plan of Merger, all of the outstanding equity interests (including outstanding warrants) of BinOptics were exchanged for aggregate consideration of approximately $208.4 million in cash. In addition we paid $14.6 million as part of a related retention escrow agreement designed to retain certain BinOptics employees. This $14.6 million was included in the terms of the purchase agreement and has been accounted for as a post-closing prepaid expense. We funded the BinOptics Acquisition with a combination of cash on hand and the incurrence of $100.0 million of additional borrowings under our existing Revolving Facility. For the twelve months ended October 2, 2015, we recorded transaction costs of approximately $4.2 million related to the BinOptics Acquisition in selling, general and administrative expense in the accompanying consolidated statements of operations.

The BinOptics Acquisition was accounted for as a purchase and the operations of BinOptics have been included in our consolidated financial statements since the date of acquisition.

We recognize the BinOptics assets acquired and liabilities assumed based upon the fair value of such assets and liabilities measured as of the date of acquisition. The aggregate purchase price for BinOptics is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess of the purchase price over the fair value of the acquired net assets represents cost and revenue synergies specific to the Company, as well as non-capitalizable intangible assets, such as the employee workforce acquired, and has been allocated to goodwill, none of which is tax deductible.

The Company expects to finalize its allocation of purchase price within 12 months of December 15, 2014. The preliminary allocation of purchase price as of October 2, 2015, is as follows (in thousands):


	Original Allocation		Allocation Adjustments			October 2, 2015 Adjusted Allocation
Current assets	$	41,836	$	(18,162	)	$	23,674
Intangible assets		135,254		1,646			136,900
Other assets		14,090		(4,896	)		9,194

Total assets acquired		191,180		(21,412	)		169,768

Liabilities assumed:
Debt		1,491		1,044			2,535
Deferred income taxes		37,745		(4,400	)		33,345
Other liabilities		12,810		296			13,106

Total liabilities assumed		52,046		(3,060	)		48,986

Net assets acquired		139,134		(18,352	)		120,782

Consideration:
Cash paid upon closing, net of cash acquired		224,114		(15,762	)		208,352

Goodwill	$	84,980	$	2,590		$	87,570

The $15,762 of allocation adjustments shown above in the “Cash paid upon closing, net of cash acquired” caption consists of the following (in thousands):


	Cash paid upon closing, net of cash acquired
Original Allocation	$	224,114
Reclassification of prepaid compensation		(14,586	)
Reclassification of assumed capital lease debt		(1,044	)
Reclassification of escrow fees		(17	)
Cash received from acquiree related to working capital true-up		(115	)

Allocation Adjustments		(15,762	)

Adjusted Allocations at October 2, 2015	$	208,352

The prepaid compensation item above is to reclassify the employee retention escrow payment previously reported as a cash outflow from investing activities, to cash outflows from operating activities. The assumed capital lease debt item above is to show the gross capital lease debt assumed in the acquisition, not previously shown as part of purchase consideration.

The components of the acquired intangible assets on a preliminary basis are as follows (in thousands):


	Amount		Useful Lives (Years)
Developed technology	$	17,500		7
Customer relationships		119,400		10

	$	136,900

The overall weighted-average life of the identified intangible assets acquired in the BinOptics Acquisition is estimated to be 9.6 years and the assets are being amortized over their estimated useful lives based upon the pattern over which we expect to receive the economic benefit from these assets.

The purchase accounting is preliminary and subject to completion including the areas of taxation where we are finalizing a study of the potential utilization of acquired net operating losses is not yet complete, and certain fair value measurements, particularly the finalization of the valuation assessment of the acquired tangible and intangible assets. The adjustments arising from the completion of the outstanding matters may materially affect the preliminary purchase accounting.

The following is a summary of BinOptics revenue and earnings included in the accompanying consolidated statements of operations for the twelve months ended October 2, 2015 (in thousands):


	Twelve Months Ended October 2, 2015
Revenue	$	61,549
Income before income taxes		354

Unaudited Supplemental Pro Forma Data—The pro forma statements of operations data for the twelve months ended October 2, 2015 and October 3, 2014, below, give effect to the BinOptics Acquisition, described above, as if it had occurred at September 28, 2013. These amounts have been calculated after applying our accounting policies and adjusting the results of BinOptics to reflect the additional acquisition costs of $9.3 million, change of control and retention payments, the impact of the step-up to the value of the acquired inventory, as well as amortization that would have been charged assuming the fair value adjustments to intangible assets and additional interest expense on acquisition-related borrowings had been applied and incurred since September 28, 2013. This pro forma data is presented for informational purposes only and does not purport to be indicative of our future results of operations.


	Twelve Months Ended
	October 2, 2015			October 3, 2014
Revenue	$	428,440		$	384,452
Loss from continuing operations before income taxes		(3,489	)		(98,119	)

The table above represents proforma net income (loss) which differs from the actual results due to adjustments related to inventory step-up and intangible amortization expense which were reflected in fiscal 2014, as well as compensation costs paid to BinOptics employees and transaction costs paid to third parties in connection with the BinOptics acquisition.

Acquisition of Mindspeed Technologies, Inc.—On December 18, 2013, we completed the acquisition of Mindspeed Technologies, Inc. (Mindspeed), a supplier of semiconductor solutions for communications infrastructure applications (Mindspeed Acquisition). We acquired Mindspeed to further our expansion into high-performance analog products.

We completed the Mindspeed Acquisition through a cash tender offer (Offer) by Micro Merger Sub, Inc. (Merger Sub), a wholly-owned subsidiary, for all of the outstanding shares of common stock, par value $0.01 per share, of Mindspeed (Shares) at a purchase price of $5.05 per share, net to the seller in cash, without interest, less any applicable withholding taxes (Offer Price). Immediately following the Offer, Merger Sub merged with and into Mindspeed, with Mindspeed surviving as a wholly-owned subsidiary. At the effective time of the merger, each Share not acquired in the Offer (other than shares held by us, Merger Sub and Mindspeed, and shares of restricted stock assumed by us in the merger) was converted into the right to receive the Offer Price. We funded the Mindspeed Acquisition through the use of available cash and borrowings under its revolving credit facility (see Note 8 below). The aggregate purchase price for the Shares, net of cash acquired, was $232.0 million and we assumed $81.3 million of liabilities and incurred costs of $4.5 million expensed during fiscal year 2014.

The Mindspeed Acquisition was accounted for as a purchase and the operations of Mindspeed have been included in our consolidated financial statements since the date of acquisition.

We are recognizing all assets acquired and liabilities assumed based upon the fair value of such assets and liabilities measured as of the date of acquisition. The aggregate purchase price for Mindspeed is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. None of the goodwill resulting from this acquisition is deductible for tax purposes.

We completed the allocation of purchase price during the fourth quarter of fiscal 2014, as follows (in thousands):


	Final Allocation
Assets acquired:
Current assets	$	50,612
Intangible assets		138,663
Deferred income taxes		92,881
Other assets		31,788

Total assets acquired		313,944

Liabilities assumed:
Current liabilities		35,270
Debt		40,177
Other long-term liabilities		5,865

Total liabilities assumed		81,312

Net assets acquired		232,632

Consideration:
Cash paid upon closing, net of cash acquired	$	232,028
Fair value of vested awards assumed in acquisition		785

Total consideration		232,813

Goodwill		181

In connection with the Mindspeed Acquisition, we assumed all of the outstanding options and all unvested restricted stock awards under Mindspeed’s equity plans and converted such options and stock awards into equivalent awards under the same general terms and conditions as were in existence with adjustments made to shares and exercise prices, if any, pursuant to a formula stipulated in the terms of the acquisition. The fair value of the assumed options and stock awards was $4.1 million, of which $0.8 million relates to vested stock options which has been included in the purchase consideration and the remainder relates to unvested stock options and stock awards, which will be expensed as the remaining services are provided.

The elements of the acquired intangible assets were as follows (in thousands):


	Amount		Useful Lives (Years)
Developed technology	$	109,263	7
Customer relationships		11,430	10
In-process research and development		17,970	N/A

	$	138,663

The overall weighted-average life of the identified intangible assets acquired in the acquisition is estimated to be seven years.

The following is a summary of Mindspeed revenue and earnings included in our accompanying consolidated statements of operations for fiscal year 2014 (in thousands):


Revenue	$	94,613
Loss from continuing operations before income taxes		(9,266	)

Unaudited Supplemental Pro Forma Data—The pro forma statements of operations data for fiscal year 2014 below give effect to the Mindspeed Acquisition, described above, as if it had occurred at September 29, 2012. These amounts have been calculated after applying our accounting policies and adjusting the results of Mindspeed to reflect the acquisition costs of $4.5 million paid by us, $14.1 million of restructuring charges and change-in-control payments, the impact of the step-up to fair value of the acquired inventory, as well as the additional depreciation and amortization that would have been charged assuming the fair value adjustments to property, plant and equipment and intangible assets and additional interest expense on acquisition-related borrowings had been applied and incurred since September 29, 2012. This supplement pro forma earnings for fiscal year 2014 and 2013 were adjusted to exclude discontinued operations. This pro forma data is presented for informational purposes only and does not purport to be indicative of our future results of operations.


	Twelve Months Ended
	October 3, 2014			September 27, 2013
	(in thousands)
Revenue	$	358,645		$	380,362
Loss from continuing operations before income taxes		(21,164	)		(43,007	)

Acquisition under Common Control—On February 13, 2014, we acquired Nitronex, an entity under common control, through a cash payment of $26.1 million for all of the outstanding ownership interests of Nitronex. We funded the Nitronex Acquisition through the use of available cash and borrowings under its revolving credit facility. The purchase price includes $3.9 million held on account by a third-party escrow agent pending any claims by us in connection with general representation matters made by GaAs Labs in the transaction. The indemnification period expired in August 2015, at which point all but $500,000 of the escrow fund was released to GaAs Labs and the remainder was retained by the escrow agent pending final resolution of an outstanding indemnity claim.

Other Acquisitions—In the fiscal fourth quarter of 2014 we acquired two businesses, IKE Micro and Photonic Controls. The first acquisition, IKE Micro, is a specialized build-to-print house based in Nashua, New Hampshire. The primary purpose of IKE Micro acquisition is to drive COGS reductions and further improve gross margin in our Optoelectronics business. The second acquisition, Photonic Controls, is a small design company based in Corning, New York which specializes in photonic semiconductor development and system design. Their primary focus is to design silicon photonic chips for 100G/400G optical networks and future aerospace and defense applications.

The assets acquired and liabilities assumed were recorded at their fair values and operating results were included in the consolidated financial statements from the date of acquisition. All accounting has been completed for the acquisitions, which resulted in goodwill of $3.9 million and intangible assets, including manufacturing know-how and customer relationships, of $1.6 million recorded on the date of acquisition, which will be amortized over 7-10 years. Additionally, we recorded a contingent consideration liability of $1.2 million related to the acquisition of Photonic Controls which is included in other long-term liabilities in the accompanying consolidated balance sheet as of October 2, 2015. The maximum possible payment of contingent purchase price is $1.3 million. Approximately $1.7 million of the goodwill resulting from these acquisitions is deductible for tax purposes. The acquisitions were not material to our consolidated financial statements.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1497-128463

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1490-128463

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 805
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 3
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1524-128463

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-Name Accounting Standards Codification
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+ Details

Investments

12 Months Ended

Oct. 02, 2015

Investments, Debt and Equity Securities [Abstract]

Investments

4. INVESTMENTS

During the fourth quarter of 2015, we purchased investment securities for approximately $40.2 million. We did not hold any available-for-sale securities as of October 3, 2014. All investments are classified as available-for-sale. The amortized cost, gross unrealized holding gains or losses, and fair value of our available-for-sale investments by major investments type are summarized in the tables below (in thousands):


	October 2, 2015
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Aggregate Fair Value
Corporate bonds	$	24,546	$	5	$	(89	)	$	24,462
US treasuries and agency bonds		15,108		3		(16	)		15,095

Total investments	$	39,654	$	8	$	(105	)	$	39,557

The contractual maturities of available-for-sale investments were as follows (in thousands):


	October 2, 2015
Less than 1 year	$	16,259
Over 1 year		23,298

Total investments	$	39,557

Available-for-sale investments are reported at fair value and as such, their associated unrealized gains and losses are reported as a separate component of stockholders’ equity (deficit) within accumulated other comprehensive income (loss).

Other Investments—We determined the appropriate classification of our investments at the time of acquisition and re-evaluate such determination at each balance sheet date. We record at cost non-marketable equity investments where we do not have the ability to exercise significant influence or control and periodically reviews such investments for impairment.

During fiscal year 2015 and 2014, we made a minority investment of $0.5 million and $0.3 million, respectively in the convertible debt of a privately-held U.S. based company. This investment was included in the assets sold in connection with the Automotive business.

During fiscal year 2014, we made a minority investment of $5.0 million in the equity of a privately-held U.S. based company. This minority equity investment was accounted for under the cost method and is included on the consolidated balance sheets in other long-term assets. During the second fiscal quarter of 2015, the privately-held U.S. based company was sold to a third party which provided us with information that the underlying value of the investment had been impaired at April 3, 2015. Accordingly, we recorded an impairment charge of $3.5 million which is included in Other Expense in the Consolidated Statement of Operations during fiscal year 2015. We received $1.5 million in exchange for the equity investment during fiscal year 2015.

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

Fair Value

12 Months Ended

Oct. 02, 2015

Fair Value Disclosures [Abstract]

Fair Value

5. FAIR VALUE

Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):


	October 2, 2015
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	15,000	$	15,000	$	—	$	—
US treasuries and agency bonds		15,095		—		15,095		—
Corporate bonds		24,462		—		24,462		—

Total assets measured at fair value	$	54,557	$	15,000	$	39,557	$	—

Liabilities
Contingent consideration	$	1,150	$	—	$	—	$	1,150
Common stock warrant liability		21,822		—		—		21,822

Total liabilities measured at fair value	$	22,972	$	—	$	—	$	22,972


	October 3, 2014
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Trading securities	$	250	$	—	$	—	$	250

Total assets measured at fair value	$	250	$	—	$	—	$	250

Liabilities
Contingent consideration	$	820	$	—	$	—	$	820
Warrant liability		15,801		—		—		15,801

Total liabilities measured at fair value	$	16,621	$	—	$	—	$	16,621

The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):


	Fiscal Year 2015
	October 3, 2014		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements			Transfers in and/or (out) of Level 3		October 2, 2015
Trading securities	$	250	$	—	$	500	$	(750	)	$	—	$	—

Contingent consideration	$	820	$	330	$	—	$	—		$	—	$	1,150

Warrant liability	$	15,801	$	6,021	$	—	$	—		$	—	$	21,822


	Fiscal Year 2014
	September 27, 2013		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		Transfers in and/or (out) of Level 3		October 3, 2014
Trading securities	$	—	$	—	$	250	$	—	$	—	$	250

Contingent consideration	$	—	$	—	$	820	$	—	$	—	$	820

Warrant liability	$	11,873	$	3,928	$	—	$	—	$	—	$	15,801


	Fiscal Year 2013
	September 28, 2012		Net Realized/Unrealized Losses (Gains) Included in Earnings			Purchases and Issuances		Sales and Settlements			Transfers in and/or (out) of Level 3		September 27, 2013
Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—

Warrant liability	$	7,561	$	4,312		$	—	$	—		$	—	$	11,873

Money market funds which are included in cash and cash equivalents, are actively traded and consist of highly liquid investments with original maturities of 90 days or less. They are measured at their net asset value (“NAV”) and classified as Level 1. Corporate, treasury and agency bonds are categorized as Level 2 assets except where sufficient quoted prices exist in active markets, in which case such securities are categorized as Level 1 assets. These securities are valued using third-party pricing services. These services may use, for example, model-based pricing methods that utilize observable market data as inputs. Broker dealer bids or quotes of securities with similar characteristics may also be used. Our policy is to recognize significant transfers between levels at the actual date of the event. We had no transfers of financial assets or liabilities between Level 1, Level 2 or Level 3 during the periods presented.

The fair values of the contingent consideration liabilities were estimated based upon a risk-adjusted present value of the probability-weighted expected payments by us. Specifically, we considered base, upside and downside scenarios for the operating metrics upon which the contingent payments are to be based. Probabilities were assigned to each scenario and the probability-weighted payments were discounted to present value using risk-adjusted discount rates.

As of October 2, 2015 and October 3, 2014, the fair value of the common stock warrants has been estimated using a Black-Scholes option pricing model giving consideration to the quoted market price of the common stock on that date, an expected lives of 5.2 years and 6.2 years, expected volatility of 36.0% and 42.3% and risk free rates of 1.30% and 2.16%, respectively. The change in approach to estimation results from our IPO in March 2012 and the availability of a quoted market price for the common stock underlying the warrants.

These estimates include significant judgments and actual results could materially differ and have a material impact upon the values of the recorded liabilities. Any changes in the estimated fair values of the liabilities in the future will be reflected in our earnings and such changes could be material.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Inventories

12 Months Ended

Oct. 02, 2015

Inventory Disclosure [Abstract]

Inventories

6. INVENTORIES

Inventories consist of the following (in thousands):


	October 2, 2015		October 3, 2014
Raw materials	$44,329		$34,919
Work-in-process		3,086		5,500
Finished goods		32,528		31,062

Total	$	79,943	$	71,481

Property, Plant and Equipment

12 Months Ended

Oct. 02, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following (in thousands):


	October 2, 2015			October 3, 2014
Land, buildings and improvements	$	10,981		$	—
Machinery and equipment		89,852			67,427
Leasehold improvements		9,161			7,958
Furniture and fixtures		983			1,017
Construction in process		25,898			12,918
Computer equipment and software		9,307			7,648

Total property and equipment		146,182			96,968
Less accumulated depreciation and amortization		(62,423	)		(46,916	)

Property and equipment — net	$	83,759		$	50,052

Depreciation and amortization expense related to property and equipment for fiscal years 2015, 2014, and 2013 was $15.7 million, $14.0 million and $10.5 million, respectively.

Debt

12 Months Ended

Oct. 02, 2015

Debt Disclosure [Abstract]

Debt

8. DEBT

On September 26, 2013, and as amended November 5, 2013, we entered into an amended and restated loan agreement with a syndicate of lenders, which provided for a revolving credit facility of up to $300.0 million that was due to mature in September 2018 (Prior Facility). Borrowings under the revolving credit facility bore a variable interest rate based on either the lender’s prime rate or a LIBOR rate, plus an applicable margin. The revolving credit facility was secured by a first priority lien on substantially all of our assets and required compliance with certain financial and non-financial covenants. In connection with the Mindspeed and Nitronex acquisitions, we borrowed an aggregate of $245.0 million of indebtedness on our Prior Facility.

On May 8, 2014, we refinanced our outstanding indebtedness under the prior facility and discharged our obligations thereunder by entering into a credit agreement (Credit Agreement) with a syndicate of lenders. Concurrent with the execution of the Credit Agreement, we terminated the prior facility and repaid the outstanding $245.0 million principal and interest due. Upon terminating the prior facility, previously deferred financing costs pertaining to that facility of $2.1 million were expensed as additional interest.

The Credit Agreement provides for term loans in an aggregate principal amount of $350.0 million, which mature in May 2021 (Term Loans) and a revolving credit facility of $100.0 million initially, which matures in May 2019 (Revolving Facility). In February 2015, we executed an amendment to the credit agreement that increased our aggregate borrowing capacity under the Revolving Facility to $130.0 million. The Term Loans were issued with an original issue discount of 0.75%, which is being amortized over the term of the Term Loans using the straight-line method, which approximates the effective interest rate method. Borrowings under the Term Loans bear interest (payable quarterly) at: (i) for LIBOR loans, a rate per annum equal to the LIBOR rate (subject to a floor of 0.75%), plus an applicable margin of 3.75%, and (ii) for base rate loans, a rate per annum equal to the prime rate (subject to a floor of 1.75%), plus an applicable margin of 2.75%. Borrowings under the Revolving Facility bear interest (payable quarterly) at: (i) for LIBOR loans, a rate per annum equal to the LIBOR rate, plus an applicable margin in the range of 2.00% to 2.50% (based on our total net leverage ratio being within certain defined ranges); and (ii) for base rate loans, a rate per annum equal to the prime rate, plus an applicable margin in the range of 1.00% to 1.50% (based on our total net leverage ratio being within certain defined ranges). The effective interest rate on our Term Loans was 4.5% as of October 2, 2015. We also pay a quarterly unused line fee for the Revolving Facility in the range of 0.25% to 0.375% (based on our total net leverage ratio being within certain defined ranges) as well as overall agency fees. We borrowed $100.0 million of indebtedness on our Revolving Facility in connection with the BinOptics Acquisition, which was paid down in full using net proceeds from a public offering of common stock we completed in February 2015. As of October 2, 2015, we had $130.0 million of borrowing capacity under the Revolving Facility.

The Term Loans are payable in quarterly principal installments equal to 0.25% of the aggregate dollar amount of all Term Loans outstanding at the signing of the Credit Agreement, with the remainder due on the maturity date. In the event that we divest a business, the net cash proceeds of the divestment are generally to be applied to repayment of outstanding Term Loans except to the extent we reinvest such proceeds in assets useful for its business within 18 months of receiving the proceeds. To the extent we enter into a binding agreement to reinvest such proceeds within 18 months of receiving them, we have until the later of 18 months following our receipt of the proceeds and six months following the date of such agreement to complete the reinvestment. We expect to reinvest the proceeds from the sale of the Automotive business.

At the signing of the Credit Agreement, the entire $350.0 million principal amount of the Term Loans was funded. The Term Loans and Revolving Facility are secured by a first priority lien on substantially all of our assets and provide that we must comply with certain financial and non-financial covenants. We incurred $8.7 million in fees for the issuance of the Credit Agreement which were recorded as deferred financing costs and are being amortized over the life of Credit Agreement as interest expense. As of October 2, 2015, approximately $6.9 million of deferred financing costs remain unamortized.

The Credit Agreement contains covenants that require, among other items, maintenance of certain financial ratios and also limit our ability to: issue dividends; acquire and dispose of businesses; and transfer assets among domestic and international entities.

As of October 2, 2015, the following remained outstanding on the Term Loans:


Principal balance	$	345,625
Unamortized discount		(2,094	)

		343,531
Current portion		3,500

Long-term, less current portion	$	340,031

As of October 2, 2015, the minimum principal payments under the Term Loans in future fiscal years was as follows (in thousands):


2016	$	3,500
2017		3,500
2018		3,500
2019		3,500
2020		3,500
Thereafter		328,125

Total	$	345,625

The fair value of the Term Loans was estimated to be approximately $346.5 million as of October 2, 2015 and was determined using Level 3 inputs, including a quoted rate from a bank.

In connection with the BinOptics Acquisition during fiscal year 2015 we assumed capital lease obligations of approximately $2.5 million of which approximately $1.0 million was outstanding as of October 2, 2015.

Additionally, the Company assumed $40.9 million of debt in the Mindspeed Acquisition. The Company paid off these assumed debt amounts of $40.9 million during fiscal year 2014.

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Oct. 02, 2015
Text Block [Abstract]
Employee Benefit Plans	9. EMPLOYEE BENEFIT PLANS We established a defined contribution savings plan under Section 401(k) of the Code (Section 401(k)) on October 1, 2009 (401(k) Plan). The 401(k) Plan follows a calendar year, covers substantially all U.S. employees who meet minimum age and service requirements, and allows participants to defer a portion of their annual compensation on a pretax basis, subject to legal limitations. Our contributions to the plan may be made at the discretion of the board of directors. During the fiscal year ended October 2, 2015, we contributed $1.4 million to our 401(k) Plan for calendar year 2014. There were no contributions made by us to the 401(k) Plan for calendar year 2015 through October 2, 2015. Our employees located in foreign jurisdictions meeting minimum age and service requirements participate in defined contribution plans whereby participants may defer a portion of their annual compensation on a pretax basis, subject to legal limitations. Company contributions to these plans are discretionary and vary per region. We expensed contributions of $1.0 million, $1.0 million, and $0.9 million for fiscal years 2015, 2014, and 2013, respectively.

Accrued Liabilities

12 Months Ended

Oct. 02, 2015

Text Block [Abstract]

Accrued Liabilities

10. ACCRUED LIABILITIES

Accrued liabilities consist of the following (in thousands):


	October 2, 2015		October 3, 2014
Compensation and benefits	$	20,711	$	19,135
Product warranty		656		446
Professional fees		2,167		1,528
Software licenses		1,223		1,862
Distribution costs		3,091		1,757
Restructuring costs		943		801
Interest payable		3,502		2,447
Rent and utilities		1,458		1,658
Other		3,848		3,962

Total	$	37,599	$	33,596

Commitments and Contingencies

12 Months Ended

Oct. 02, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

11. COMMITMENTS AND CONTINGENCIES

Operating Leases—We have non-cancelable operating lease agreements for office, research and development and manufacturing space in the United States and foreign locations. We also have operating leases for certain equipment, automobiles and services in the United States and foreign jurisdictions. These lease agreements expire at various dates through 2022 and certain agreements contain provisions for extension at substantially the same terms as currently in effect. Lease escalation clauses, rent abatements and/or concessions, such as rent holidays and landlord or tenant incentives or allowances, are typically included in the determination of straight-line rent expense over the lease term.

Future minimum lease payments for the next five fiscal years as of October 2, 2015, are as follows (in thousands):


2016	$	7,343
2017		6,555
2018		5,177
2019		4,836
2020		2,038
Thereafter		4,279

Total minimum lease payments	$	30,228

Rent expense incurred under non-cancelable operating leases was $6.5 million, $6.6 million, and $4.5 million in fiscal years 2015, 2014, and 2013, respectively.

Asset Retirement Obligations—We are obligated under certain facility leases to restore those facilities to the condition in which we or our predecessors first occupied the facilities. We are required to remove leasehold improvements and equipment installed in these facilities prior to termination of the leases. As of October 2, 2015, October 3, 2014 and September 27, 2013, the estimated costs for the removal of these assets are recorded as asset retirement obligations was $1.3 million, $1.8 million and $1.0 million, respectively.

Unused Letter of Credit—As of October 2, 2015, we had outstanding unused letters of credit from a bank aggregating $0.4 million.

Purchase Commitments—As of October 2, 2015, we had outstanding non-cancelable purchase commitments aggregating $1.2 million pursuant to inventory supply arrangements.

Litigation—We are periodically subject to legal proceedings, claims and contingencies arising in the ordinary course of business.

Patent Suit Against Laird. We brought a patent infringement suit against Laird Technologies, Inc. (Laird) in the Federal District Court for the District of Delaware on February 11, 2014, seeking monetary damages and a permanent injunction. The suit alleged that Laird infringed on our United States Patent No. 6,272,349 (‘349 Patent), titled “Integrated Global Positioning System Receiver,” by making, using, selling, offering to sell or selling products incorporating an integrated global positioning receiver that include structure(s) recited in the ‘349 Patent, including global positioning system modules for Automotive industry customers. The court entered a preliminary injunction against Laird on June 13, 2014. On April 15, 2015, the parties reached a confidential settlement agreement, filed a stipulated permanent injunction with the court that is similar in scope to the preliminary injunction, and filed a stipulated dismissal of all claims. The permanent injunction and dismissal were entered on April 21, 2015 by the court.

Class Action Suit Against Mindspeed Technologies, Inc. On March 10, 2015, Philip Alvarez, a former employee of Mindspeed filed a putative class action lawsuit against Mindspeed in the Superior Court of California for the County of Orange. On April 24, 2015, Alvarez filed a First Amended Complaint adding our subsidiary M/A-COM Technology Solutions Inc. as a defendant. The lawsuit alleged, among other things, that Alvarez and certain other employees who designed and manufactured hardware systems for Mindspeed or M/A-COM Technology Solutions Inc. between March 10, 2011 and the present were misclassified as exempt employees under California law. The lawsuit seeks recovery of alleged unpaid overtime wages, meal and rest period premiums, penalties and attorneys’ fees. We dispute the allegations of the lawsuit. On June 15, 2015, Mindspeed removed the action to the United States District Court for the Central District of California. On July 15, 2015, Plaintiff filed a Motion to Remand, which Motion was denied in an Order dated September 9, 2015. The parties have reached an agreement for the dismissal of all class action allegations and claims in the action, as well as certain other claims against Mindspeed and M/A-COM Technology Solutions Inc. The parties have stipulated to the filing of a Second Amended Complaint that effectuates this agreement, and are awaiting order by the Court on that stipulation. After the Second Amended Complaint is filed, the matter will proceed as an individual action by Alvarez seeking only his personal claims, as well as claims under the Private Attorneys’ General Act.

With respect to the above and other legal proceedings, we have not been able to reasonably estimate the amount or range of any possible loss, and accordingly have not accrued or disclosed any related amounts of possible loss in the accompanying consolidated financial statements.

Restructurings

12 Months Ended

Oct. 02, 2015

Restructuring and Related Activities [Abstract]

Restructurings

12. RESTRUCTURINGS

We have periodically implemented restructuring actions in connection with broader plans to reduce staffing, reduce the its internal manufacturing footprint, and, generally, reduce operating costs. The restructuring expenses are comprised of direct and incremental costs related to facility closure, change-in-control obligations, severance, and outplacement fees for the terminated employees. The following is a summary of the costs incurred and remaining balances included in accrued expenses related to restructuring actions taken (in thousands):


	Total
Balance — September 28, 2012	$	328
Current period charges		1,060
Payments		(1,243	)

Balance — September 27, 2013		145
Current period charges		14,823
Payments		(14,167	)

Balance — October 3, 2014		801
Current period charges		1,280
Payments		(1,138	)

Balance — October 2, 2015	$	943

In fiscal year 2014, we implemented restructuring plans to reduce manufacturing and operating costs of the Mindspeed and Nitronex operations through a reduction of staffing. In fiscal year 2015, we implemented additional restructuring actions primarily associated with employee-related separation costs. We do not anticipate any additional restructuring costs associated with the 2015 actions and expect the remaining balance outstanding as of October 2, 2015 to be paid during the upcoming fiscal quarters.

Product Warranties

12 Months Ended

Oct. 02, 2015

Guarantees [Abstract]

Product Warranties

13. PRODUCT WARRANTIES

We establish a product warranty liability at the time of revenue recognition. Product warranties generally have terms of between 12 months and 60 months and cover nonconformance with specifications and defects in material or workmanship. For sales to distributors, our warranty generally begins when the product is resold by the distributor. The liability is based on estimated costs to fulfill customer product warranty obligations and utilizes historical product failure rates. Should actual warranty obligations differ from estimates, revisions to the warranty liability may be required.

Product warranty liability activity is as follows (in thousands):


	Fiscal Years
	2015		2014			2013
Balance — beginning of year	$	446	$	318		$	549
Impact of acquisition		50		202			—
Provisions		160		(74	)		(49	)
Direct charges		—		—			(182	)

Balance — end of year	$	656	$	446		$	318

Intangible Assets

12 Months Ended

Oct. 02, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

14. INTANGIBLE ASSETS

Amortization expense related to amortized intangible assets is as follows (in thousands):


	Fiscal Years
	2015		2014		2013
Cost of revenue	$	27,285	$	18,787	$	2,986
Selling, general and administrative		11,695		1,806		1,335

Total	$	38,980	$	20,593	$	4,321

Intangible assets consist of the following (in thousands):


	October 2, 2015			October 3, 2014
Acquired technology	$	162,536		$	131,953
Customer relationships		144,070			24,670
In-process research and development		8,000			17,970
Trade name		3,400			3,400

Total		318,006			177,993
Less accumulated amortization		(74,340	)		(35,360	)

Intangible assets — net	$	243,666		$	142,633

A summary of the activity in intangible assets and goodwill follows (in thousands):


	Total			Acquired Technology		Customer Relationships		In-Process Research and Development			Trade Name		Goodwill
Balance at September 27, 2013	$	46,937		$	23,637	$	13,150	$	—		$	3,400	$	6,750
Net intangibles acquired		137,405			103,881		11,520		17,970			—		4,034
Other intangibles purchased		4,435			4,435		—		—			—		—

Balance at October 3, 2014		188,777			131,953		24,670		17,970			3,400		10,784
Net intangibles acquired		224,470			17,500		119,400		—			—		87,570
Placed in service		—			9,780				(9,780	)		—		—
Adjustment to fair value		(190	)		—		—		(190	)		—		—
Goodwill allocation to discontinued operations		(5,008	)		—		—		—			—		(5,008	)
Other intangibles purchased		3,303			3,303		—		—			—		—

Balance at October 2, 2015	$	411,352		$	162,536	$	144,070	$	8,000		$	3,400	$	93,346

As of October 2, 2015, estimated amortization of the intangible assets in future fiscal years, was as follows (in thousands):


2016	$	43,266
2017		41,741
2018		36,354
2019		31,276
2020		25,779
Thereafter		53,996

Total	$	232,412

Neither the goodwill nor the “M/A-COM” trade name are subject to amortization; these are reviewed for impairment annually in August and more frequently if events or changes in circumstances indicate that the assets may be impaired. Accumulated amortization, for the acquired technology and customer relationships, was $52.0 million and $22.3 million, respectively, as of October 2, 2015, and $27.8 million and $7.6 million, respectively, as of October 3, 2014.

In July 2013, we entered into a long term technology licensing and transfer agreement that calls for potential payments by us of up to $9.0 million through July 2016 based upon the achievement of specified milestones. As of October 2, 2015, costs incurred in connection with the licensing and the transfer of the technology was $5.0 million and $2.7 million during fiscal years 2015 and 2014, respectively, and were capitalized as incurred as acquired technology. Costs will be amortized to costs of sales upon completion of the transfer, which is currently expected to be completed through fiscal year 2017.

Income Taxes

12 Months Ended

Oct. 02, 2015

Income Tax Disclosure [Abstract]

Income Taxes

15. INCOME TAXES

Deferred income taxes reflect the net effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and amounts used for income tax purposes. The components of our deferred tax assets and liabilities are as follows (in thousands):


	October 2, 2015			October 3, 2014
Current deferred tax assets:
Accrued liabilities	$	11,332		$	9,830
Inventory		5,043			8,088
Deferred revenue		(3	)		4,451
Accounts receivable		51			142
Federal net operating loss		11,186			15,452
Other current deferred tax assets		—			46
Discontinued operations		2,703			—
Deferred compensation		3,468			—
Valuation allowance		(2,349	)		(2,052	)

Current net deferred tax assets	$	31,431		$	35,957

Non-current deferred tax assets (liabilities):
Federal and foreign net operating losses and credits	$	70,448		$	128,035
Intangible assets		(44,196	)		(33,158	)
Property and equipment		(2,977	)		(3,072	)
Other non-current deferred tax assets		292			272
Discontinued operations		9,191			—
Deferred compensation		1,066			—
Deferred gain		23,531			—
Valuation allowance		(9,116	)		(7,448	)

Non-current net deferred tax assets (liabilities)		48,239			84,629

Total deferred tax asset	$	79,670		$	120,586

As of October 2, 2015, we have $193.5 million of gross federal net operating loss carryforward consisting of $26.2 million relating to the BinOptics Acquisition, $158.9 million attributable to the Mindspeed Acquisition, and $8.4 million relating to a prior acquisition. The federal net operating loss carryforwards will expire at various dates through 2034. The reported net operating loss carryforward includes any limitation under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, which applies to an ownership change as defined under Section 382.

The domestic and foreign income (loss) from continuing operations before taxes were as follows (in thousands):


	Fiscal Years
	2015			2014			2013
United States	$	(34,251	)	$	(60,836	)	$	(11,333	)
Foreign		18,851			19,936			14,279

(Loss) income from operations before income taxes	$	(15,400	)	$	(40,900	)	$	2,946

The components of the provision (benefit) for income taxes are as follows (in thousands):


	Fiscal Years
	2015			2014			2013
Current:
Federal	$	(19,015	)	$	712		$	2,923
State		688			(419	)		1,024
Foreign		1,092			2,181			986

Current provision (benefit)		(17,235	)		2,474			4,933

Deferred:
Federal		10,845			(16,557	)		(3,326	)
State		(4,131	)		(756	)		(1,146	)
Foreign		(1,302	)		(725	)		(273	)
Change in valuation allowance		1,965			(522	)		95

Deferred provision (benefit)		7,377			(18,560	)		(4,650	)

Total provision (benefit)	$	(9,858	)	$	(16,086	)	$	283

Our net deferred tax asset relates predominantly to our operations in the United States. A valuation allowance is recorded when, based on assessment of both positive and negative evidence, management determines that it is not more likely than not that the assets are recoverable. Such assessment is required on a jurisdictional basis.

The $11.5 million of valuation allowance as of October 2, 2015 relates primarily to state net operating loss (“NOL”) carryforwards assumed in the Mindspeed Acquisition and UK tax credit and NOL carryforwards whose recovery is not considered more likely than not. The $9.5 million of valuation allowance as of October 3, 2014 related primarily to state NOL carryforwards assumed in the Mindspeed Acquisition. The change during the year ending October 2, 2015 of $2.0 million primarily relates to reporting a $1.4 million gross R&D tax credit in the UK offset by a full valuation allowance, a $1.2 million state R&D tax credit offset by a full valuation allowance less a reduction of $0.6 million related to foreign entities.

Our effective tax rates differ from the federal and statutory rate as follows:


	Fiscal Years
	2015			2014			2013
Federal statutory rate		35.0	%		35.0	%		35.0	%
Foreign rate differential		30.5			11.2			(117.9	)
State taxes net of federal benefit		3.5			1.8			26.0
Warrant liabilities		(13.7	)		(3.4	)		51.2
Change in valuation allowance		(6.0	)		(0.3	)		3.2
Research and development credits		16.1			1.9			(98.6	)
Provision to return adjustments		9.9			—			7.3
Nondeductible compensation expense		(8.9	)		(1.5	)		7.0
Nondeductible legal fees		(4.1	)		(1.9	)		—
Nitronex losses		—			(2.6	)		102.7
Other permanent differences		1.6			(0.8	)		(1.1	)

Effective income tax rate		63.9	%		39.4	%		14.8	%

For fiscal year 2015 and 2014, the effective tax rate to calculate the tax benefit on $15.4 million and $40.9 million, respectively, of pre-tax loss from continuing operations was 63.9% and 39.4%, respectively. For fiscal year 2013, the effective tax rate to calculate the tax expense on pre-tax income of $2.9 million was 14.8%. The effective income tax rate for fiscal years 2015, 2014 and 2013 were primarily impacted by a lower income tax rate in many foreign jurisdictions in which our foreign subsidiaries operate, research and development tax credits, and the fair market value adjustment of warrant liabilities. For fiscal year 2015, the rate was impacted by a retroactive enactment of the R&D tax credit from fiscal year 2014 and a larger shift of the revenue associated with foreign entities taxed at lower rates as part of our auto divestiture. In addition, the effective income tax rate for fiscal years 2014 and 2013 were impacted by pre-acquisition Nitronex losses.

All earnings of foreign subsidiaries are considered indefinitely reinvested for the periods presented. Undistributed earnings of all foreign subsidiaries as of October 2, 2015 aggregated $71.3 million, with Ireland and Grand Cayman accounting for $34.8 million and $24.3 million, respectively. It is not practicable to determine the U.S. federal and state deferred tax liabilities associated with such foreign earnings.

Activity related to unrecognized tax benefits is as follows (in thousands):


	Amount
Balance — September 27, 2013		—
Additions based on tax positions		(1,670	)
Reductions based on tax positions		—

Balance — October 3, 2014	$	(1,670	)
Additions based on tax positions		—
Reductions based on tax positions		—

Balance — October 2, 2015	$	(1,670	)

The balance of the unrecognized tax benefit as of October 2, 2015 is included in other long-term liabilities in the accompanying consolidated balance sheets. The entire balance of unrecognized tax benefits, if recognized, will reduce income tax expense. It is our policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During fiscal year 2015, we did not make any payment of interest and penalties. There was nothing accrued in the consolidated balance sheets for the payment of interest and penalties at October 2, 2015 as the remaining unrecognized tax benefits would only serve to reduce our current federal and state NOL carryforwards, if ultimately recognized.

During fiscal year 2014, we settled the federal audit for fiscal years 2011 and 2012 with no material impact upon the financial statements. A summary of the fiscal tax years that remain subject to examination, as of October 2, 2015, for the Company’s significant tax jurisdictions are:


Jurisdiction	Tax Years Subject to Examination
United States — federal		2013 — forward
United States — various states		2012 — forward
Ireland		2012 — forward

Generally, we are no longer subject to federal income tax examinations for years before 2013, except to the extent of loss and tax credit carryforwards from those years.

Share - Based Compensation Plans

12 Months Ended

Oct. 02, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share - Based Compensation Plans

16. SHARE-BASED COMPENSATION PLANS

The following table presents the effects of stock-based compensation expense related to stock-based awards to employees and non-employees in our consolidated statements of operations during the periods presented (in thousands):


	Fiscal Years
	2015		2014		2013
Cost of revenue	$	1,949	$	1,771	$	1,068
Research and development		5,447		2,818		1,739
Selling, general and administrative		12,039		6,688		3,649

Total	$	19,435	$	11,277	$	6,456

Amounts presented above included share-based compensation expense in 2015, 2014 and 2013 related to employees terminated in conjunction with the Automotive divestiture in August 2015 of $0.4 million, $0.3 million and $0.1 million, respectively.

We have three equity incentive plans: the Amended and Restated 2009 Stock Incentive Plan (2009 Plan), the 2012 Omnibus Incentive Plan (2012 Plan) and the 2012 Employee Stock Purchase Plan (ESPP).

Upon the closing of the IPO, all shares that were reserved under the 2009 Plan but not awarded were assumed by the 2012 Plan. No additional awards will be made under the 2009 Plan. Under the 2012 Plan, we have the ability to issue incentive stock options (ISOs), non-statutory stock options (NSOs), performance-based non-statutory stock options, stock appreciation rights, restricted stock (RSAs), restricted stock units (RSUs), performance-based stock units (PRSUs), performance shares, and other equity-based awards to employees, directors and outside consultants. The ISOs and NSOs must be granted at a price per share not less than the fair value of our common stock on the date of grant. Options granted to date primarily vest over a four-year period with 25% vesting at the end of one year and the remaining vesting monthly thereafter. Certain of the share-based awards granted and outstanding as of October 2, 2015, are subject to accelerated vesting upon a sale of the Company or similar changes in control. Options granted generally have a term of 7 to 10 years. As of October 2, 2015, we had 9.0 million shares available for future grants under the 2012 Plan.

Stock Options

A summary of stock option activity for fiscal year 2015 is as follows (in thousands, except per share amounts):


	Number of Shares			Weighted-Average Exercise Price per Share		Weighted- Average Remaining Contractual Term (in Years)		Aggregate Intrinsic Value
Options outstanding — October 3, 2014		948		$	11.72		6.6	$	10,015

Granted		255			33.60
Exercised		(288	)		9.08
Forfeited, canceled or expired		(26	)		27.11

Options outstanding — October 2, 2015		889		$	18.4		6.19	$	10,574

Options vested and expected to vest — October 2, 2015		889		$	18.4		6.19	$	10,574

Options exercisable — October 2, 2015		644		$	12.63		6.03	$	10,574

Aggregate intrinsic value represents the difference between our closing stock price on October 2, 2015, and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $7.1 million, $7.6 million and $8.4 million for fiscal year 2015, 2014 and 2013, respectively.

In April 2015 and May 2015, the Company granted 225,000 performance-based stock options for shares of common stock with an aggregate grant date fair value of $2.0 million that are subject to vesting based on a service and individual performance targets. The Company used the Black-Scholes valuation model for estimating the fair value on the date of grant of $10.35 and $10.12 per option share, respectively. The fair value of stock option awards is affected by valuation assumptions, including volatility, the Company’s stock price, expected term of the option, risk-free interest rate and expected dividends.

The weighted-average assumptions used for calculating the fair value of stock options granted is as follows:


Risk-free interest rate	1.2	%
Expected term (years)	4.0
Expected volatility	36.2	%
Expected dividends	—	%

The performance-based stock options described above will vest and become exercisable in full if certain pre-established revenue and non-GAAP gross margin targets are met or exceeded in any period of four consecutive fiscal quarters completed during the term of the options. The stock options have a term of seven years, assuming continued employment with or services to the Company, and have an average exercise price of $34.06 and equal to the closing price of the Company’s common stock on the date of grant.

In September 2015, we granted 30,000 stock option awards, with an exercise price of $29.80, under the 2012 stock compensation plan with a grant date fair value of $0.4 million that are subject to vesting only upon the closing market price of the Company’s underlying public stock being equal to or in excess of $63.60 per share for a period of not less than three consecutive trading days. These stock options fair value of $12.38 was estimated using a Monte Carlo simulation model based on the market conditions vesting condition. Compensation cost is recognized on a straight-line basis over the estimated service period of approximately three years, expiring in September 2022.

In April 2014, we granted 405,000 options to purchase common stock with a grant date fair value of $3.5 million that are subject to vesting only upon the market price of the Company’s underlying public stock closing at or above $32.55 per share within ten years of the grant date. Due to the market condition upon which vesting is based, the fair value of the awards was estimated using a Monte Carlo simulation model. Compensation cost is recognized regardless of the number of awards that are earned based on the market condition. Compensation cost is recognized on a straight-line basis over the estimated service period of three years. In the event that the Company’s common stock achieves the target price of $32.55 per share prior to the end of the estimated service period, any remaining unamortized compensation cost will be recognized.

During the second fiscal quarter of 2015, the Company’s common stock closed at a price of $34.79 per share, exceeding the target price of $32.55 per share, which resulted in the recognition of approximately $2.5 million of compensation expense during the fiscal year.

The weighted-average assumptions used for calculating the fair value of stock options granted during fiscal year 2014, is as follows:


Risk-free interest rate	2.71	%
Expected term (years)	10	%
Expected volatility	42.6	%
Expected dividends	—	%

Restricted Stock Awards and Units

A summary of restricted stock awards and units activity for fiscal year 2015 is as follows (in thousands):


	Number of Shares			Weighted-Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
Issued and unvested — October 3, 2014		1,720			2.3	$	37,200
Granted		821
Vested		(704	)
Forfeited, canceled or expired		(145	)

Issued and unvested shares — October 2, 2015		1,692			1.4	$	48,375

Shares expected to vest		1,586			1.3	$	45,328

As of October 2, 2015, the aggregate intrinsic value of vesting restricted stock units including time-based and performance units was $45.3 million for fiscal year 2015. The total fair value of restricted stock awards and units vesting was $23.3 million, $9.2 million and $3.9 million for the fiscal years 2015, 2014 and 2013, respectively.

On April 22, 2015 and May 5, 2015, we issued performance-based RSUs which were divided into three equal tranches with one tranche based on our adjusted earnings per share (EPS) growth during fiscal year 2015, one tranche based on adjusted EPS growth during fiscal years 2015-2016 and one tranche based on adjusted EPS growth during fiscal years 2015-2017. A participant may earn between 0% to 300% of the targeted shares for each tranche based on actual performance, and a straight-line interpolation will be applied for achievement between the specified performance ranges. Once earned, the performance-based RSUs will be settled in shares of the Company’s common stock, assuming continued employment with or services to us through the vest date of May 15^th following each tranches performance criteria being met at period end.

A summary of PRSU activity during the fiscal year ended October 2, 2015 is as follows:


	Non-vested Performance-based Restricted Stock Units		Weighted-Average Grant-Date Fair Value per PRSU
Unvested shares at October 3, 2014		—
Granted		83,954	$	34.39
Change due to performance condition achievement		251,862	$	34.39
Vested		—
Forfeited		—

Unvested shares at October 2, 2015		335,816	$	34.39

The total fair value of restricted stock award units with time-based and performance vesting was $7.8 million for the fiscal year ended October 2, 2015.

In April 2015, the Company approved an amended and restated Change in Control Plan to exclude certain performance-based options and to increase the percentage by which outstanding performance-based equity awards, other than those specifically excluded) will be deemed earned in the event of a change in control, from 100% of target to 200% of targeted shares. Other share-based awards granted and outstanding as of October 2, 2015, are subject to accelerated vesting upon a sale of the Company or similar changes in control.

In conjunction with the Automotive divestiture, the Compensation Committee approved the acceleration of all unvested and outstanding RSU awards for employees who were terminated and accepted employment with the acquiring company effective upon the closing date of the transaction. Accordingly, during the fourth quarter of fiscal year ended October 2, 2015, we recorded additional stock compensation expense related to approximately 20 employees of $1.2 million related to this equity modification to accelerate vesting of unvested shares.

As of October 2, 2015, total unrecognized compensation cost, adjusted for estimated forfeitures, related to stock options, restricted stock awards and units including awards with time-based and performance vesting was $37.8 million, which is expected to be recognized over the next 3.4 years.

Employee Stock Purchase Plan (ESPP)

Concurrently with the IPO in March 2012, the ESPP became effective. The ESPP allows eligible employees to purchase shares of our common stock at a discount through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations. In administering the ESPP, the board of directors has limited discretion to set the length of the offering periods thereunder. As of October 2, 2015, total unrecognized compensation cost related to the ESPP was not material. In fiscal years 2015 and 2014, approximately 176,000 and 150,000, respectively, of shares of common stock were issued under the ESPP.

The 2012 Plan contains an “evergreen” provision, pursuant to which the number of shares of common stock available for issuance under the 2012 Plan can be increased on the first day of each fiscal year equal to the lesser of (a) 4.0% of outstanding common stock on a fully diluted basis as of the end of the immediately preceding fiscal year, (b) 1.9 million shares of common stock, and (c) a lesser amount determined by the board of directors; provided, however, that any shares from any increases in previous years that are not actually issued will continue to be available for issuance under the 2012 Plan. The ESPP also contains an “evergreen” provision, pursuant to which the number of shares of common stock available for issuance under the ESPP can be increased on the first day of each fiscal year equal to the lesser of (a) 1.25% of outstanding common stock on a fully diluted basis as of the end of the immediately preceding fiscal year, (b) 550,000 shares of common stock, and (c) a lesser amount determined by the board of directors; provided, however, that any shares from any increases in previous years that are not actually issued will continue to be available for issuance under the ESPP. In fiscal year 2015, pursuant to the evergreen provisions, the number of shares of common stock available for issuance under the 2012 Plan and the ESPP were increased by 1.9 million shares and 550,000 shares, respectively.

Stockholders' Equity

12 Months Ended

Oct. 02, 2015

Equity [Abstract]

Stockholders' Equity

17. STOCKHOLDERS’ EQUITY

Outstanding shares of common stock presented in the accompanying consolidated statements of stockholders’ equity as of October 2, 2015 and October 3, 2014, exclude 11,000 and 59,000 shares, respectively, issued as compensation to employees that were subject to forfeiture, pending continued employment with us through stated vesting dates.

Common Stock Warrants—In March 2012, we issued warrants to purchase 1,281,358 shares of common stock for $14.05 per share. The warrants expire December 21, 2020, or earlier as per the terms of the agreement, including immediately following consummation of a sale of all or substantially all assets or capital stock or other equity securities, including by merger, consolidation, recapitalization, or similar transactions. Prior to completion of the IPO in March 2012, the number of shares issuable upon exercise of the warrants were subject to potential increases pursuant to certain antidilution rights included in the agreements the holders of the warrants have the right in certain circumstances to require us to register the underlying shares of common stock for resale under the Securities Act. We do not currently have sufficient registered and available shares to immediately satisfy the request for registration, if such is made. As of October 2, 2015, no exercise of the warrants had occurred and no request had been made to register the warrants or any underlying securities for resale by the holders.

We are recording the estimated fair values of the warrants as a long-term liability in the accompanying consolidated financial statements with changes in the estimated fair value being recorded in the accompanying statements of operations. The following is a summary of the activity of the warrant liability (in thousands):


Balance — September 27, 2013	$	11,873
Change in estimated fair value		3,928

Balance — October 3, 2014		15,801
Change in estimated fair value		6,021

Balance — October 2, 2015	$	21,822

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
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-Subparagraph (SX 210.3-04)
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-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

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-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 15: http://www.xbrl.org/2003/role/presentationRef
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-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
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+ Details

Related-Party Transactions	12 Months Ended
Related-Party Transactions	Oct. 02, 2015
Related Party Transactions [Abstract]
Related-Party Transactions	18. RELATED-PARTY TRANSACTIONS GaAs Labs, a former stockholder and an affiliate of directors and then majority stockholders John and Susan Ocampo, engaged the Company to provide administrative and business development services to GaAs Labs on a time and materials basis. There are no minimum service requirements or payment obligations and the agreement may be terminated by either party with 30 days notice. We did not record any related revenue in fiscal year 2015 and recorded related revenue of $0.1 million and $0.4 million in fiscal years 2014, and 2013, respectively. Services provided pursuant to this agreement, were recorded as other income in the accompanying consolidated statements of operations. In fiscal years 2015, 2014 and 2013, we recorded revenue of $1.1 million, $0.2 million and $0.2 million, respectively, from sales of product to a privately-held company with a common director.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Discontinued Operations

12 Months Ended

Oct. 02, 2015

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

19. DISCONTINUED OPERATIONS

In the fourth quarter of fiscal year 2015, we sold our Automotive business to Autoliv ASP Inc as the Automotive business was not consistent with our long-term strategic vision from both a growth and profitability perspective. The agreed consideration included $82.1 million in cash paid at closing, subject to customary working capital and other adjustments, $18.0 million payable in eighteen months pending resolution of any contingencies as part of an indemnification agreement, plus the opportunity to receive up to an additional $30.0 million in cash based on achievement of revenue-based earnout targets through 2019. Additionally, we entered into a Consulting Agreement pursuant to which we may provide Autoliv with certain non-design advisory services for a period of two years following the closing of the transaction for up to $15.0 million in cash.

In the fourth quarter of fiscal year 2015, we recorded a pre-tax gain on the sale of the Automotive business of $61.8 million based on the $82.1 million received at closing on August 17, 2015 as described above. We expect that the remainder of the consideration to be received from Autoliv, including any amounts related to the consulting agreement, will being accounted for in discontinued operations when the contingencies are finalized and the proceeds are realizable over the next several years.

In fiscal year 2014, subsequent to closing the Mindspeed Acquisition, we decided to divest the wireless business of Mindspeed. The operations of the wireless business are included in discontinued operations through the date of sale. There was no initial gain or loss on the sale which closed in February 2014. We received $12.3 million of proceeds from the sale of the wireless business during fiscal 2014 and an additional $3.1 million during fiscal 2015 upon settlement of indemnification holdbacks, resulting in a pre-tax gain of $1.6 million.

Additionally during fiscal year 2014, we sold non-core assets representing one product line, receiving cash proceeds aggregating $12.0 million. We have no continuing interests in these assets. There was no gain or loss on the sale, which closed in May 2014 and results of this product line are included in continuing operations.

The accompanying consolidated statement of operations includes the following operating results related to these divested businesses (in thousands):


	Automotive Business									Mindspeed Wireless Business
	Fiscal Years									Fiscal Years
	2015			2014			2013			2015		2014
Revenue	$	71,712		$	79,473		$	80,368		$	—	$	2,439
Cost of revenue		46,931			51,425			53,153			—		1,249

Gross profit		24,781			28,048			27,215			—		1,190
Operating expenses:
Research and development		2,319			2,334			2,083			—		4,531
Selling, general and administrative		2,441			3,586			747			—		1,078
Restructuring charges		—			—			—			—		2,962

Total operating expenses		4,760			5,920			2,830			—		8,571

Income (loss) from discontinued operations		20,021			22,128			24,385			—		(7,381	)
Other income (expense)		4,000			—			—			—		—
Gain on sale		61,771			—			—			1,550		—

Income (loss) before income taxes		85,792			22,128			24,385			1,550		(7,381	)
Income tax provision (benefit)		32,652			8,032			8,852			559		(2,776	)

Income (loss) from discontinued operations	$	53,140		$	14,096		$	15,533		$	991	$	(4,605	)

Above includes depreciation & amortization of	$	189		$	302		$	311		$	—	$	—
Cashflow from Operating Activities	$	(9,513	)	$	16,945		$	11,798		$	991	$	(4,605	)
Cashflow from Investing Activities	$	(505	)	$	(275	)	$	(48	)	$	—	$	—

Cash flow from investing activities presented above excludes proceeds from the sale of business.

- Definition

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

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-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721683-107760

+ Details

Earnings Per Share

12 Months Ended

Oct. 02, 2015

Earnings Per Share [Abstract]

Earnings Per Share

20. EARNINGS PER SHARE

The following table set forth the computation for basic and diluted net income (loss) per share of common stock (in thousands, except per share data):


	Fiscal Years
	2015			2014			2013
Numerator:
Income (loss) from continuing operations	$	(4,597	)	$	(24,814	)	$	2,663
Loss from discontinued operations		54,131			9,491			15,533

Net income (loss)		48,589			(15,323	)		18,196

Warrant liability gain		—			—			—

Net income (loss) attributable to common stockholders	$	48,589		$	(15,323	)	$	18,196

Denominator:
Weighted average common shares outstanding-basic		51,146			47,009			45,916
Dilutive effect of options and warrants		—			—			1,221

Weighted average common shares outstanding-diluted		51,146			47,009			47,137

Common stock earnings per share-basic:
Continuing operations	$	(0.11	)	$	(0.53	)	$	0.06
Discontinued operations		1.06			0.20			0.34

Net common stock earnings per share-basic	$	0.95		$	(0.33	)	$	0.40

Common stock earnings per share-diluted:
Continuing operations	$	(0.11	)	$	(0.53	)	$	0.06
Discontinued operations		1.06			0.20			0.33

Net common stock earnings per share-diluted	$	0.95		$	(0.33	)	$	0.39

The following common equivalent shares were excluded from the calculation from net income per share as their inclusion would have been antidilutive (in thousands):


	Fiscal Years
	2015		2014		2013
Stock options and restricted stock		1,342		1,079		—
Warrants		714		329		—

Total common stock equivalent shares excluded		2,056		1,408		—

Supplemental Cash Flow Information

12 Months Ended

Oct. 02, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

21. SUPPLEMENTAL CASH FLOW INFORMATION

The following is supplemental cash flow information regarding noncash investing and financing activities:


	Fiscal Years
	2015		2014		2013
Cash paid for interest	$	15,607	$	6,994	$	501
Cash paid for income taxes	$	22,676	$	4,668	$	7,318

•

As of October 2, 2015 and October 3, 2014, we had $3.2 million and $2.4 million, respectively, in unpaid amounts related to purchases of property and equipment and intangibles included in accounts payable and accrued liabilities. These amounts have been excluded from the payments for purchases of property and equipment until paid.

•

Upon closing the Mindspeed Acquisition, we assumed $40.2 million of the seller’s indebtedness, all of which was paid in fiscal year 2014.

Accumulated Other Comprehensive Income

12 Months Ended

Oct. 02, 2015

Text Block [Abstract]

Accumulated Other Comprehensive Income

22. ACCUMULATED OTHER COMPREHENSIVE INCOME

The components of accumulated other comprehensive income, net of income taxes, are as follows:


	Foreign currency items			Other items			Total
Balance — September 27, 2013	$	(167	)	$	—		$	(167	)
Foreign currency translation adjustment		(1,097	)		—			(1,097	)
Pension adjustment, net of tax		—			(90	)		(90	)

Balance — October 3, 2014		(1,264	)		(90	)		(1,354	)
Foreign currency translation, net of tax		(918	)		—			(918	)
Other adjustments		—			90			90
Unrealized gain/loss on short term investments		—			(97	)		(97	)

Balance — October 2, 2015	$	(2,182	)	$	(97	)	$	(2,279	)

Geographic and Significant Customer Information

12 Months Ended

Oct. 02, 2015

Segment Reporting [Abstract]

Geographic and Significant Customer Information

23. GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION

We have one reportable operating segment which designs, develops, manufactures, and markets semiconductors and modules. The determination of the number of reportable operating segments is based on the chief operating decision maker’s use of financial information for the purposes of assessing performance and making operating decisions. In evaluating financial performance and making operating decisions, the chief operating decision maker primarily uses consolidated net revenue, gross profit, and operating income (loss).

Information about our operations in different geographic regions, based upon customer locations, is presented below (in thousands):


	Fiscal Years
Revenue by Geographic Region	2015		2014		2013
United States	$	152,974	$	134,436	$	110,686
China		92,493		33,308		21,057
Taiwan		56,421		34,344		10,612
Other countries (1)		118,721		137,101		100,348

Total	$	420,609	$	339,189	$	242,703

(1)	No other international countries represented greater than 10% of total revenue during the periods presented.


	As of
Long-Lived Assets by Geographic Region	October 2, 2015		October 3, 2014
United States	$	72,617	$	41,726
International (1)		11,142		8,326

Total	$	83,759	$	50,052

•

No other international country or region represented greater than 10% of the total net long-lived assets as of the dates presented.

The following is a summary of customer concentrations as a percentage of total sales and accounts receivable as of and for the periods presented:


	Fiscal Years
Revenue	2015			2014			2013
Customer A		18	%		19	%		21	%
Customer B		12	%		10	%		—	%


	October 2, 2015			October 3, 2014
Accounts Receivable	October 2, 2015			October 3, 2014
Customer A		22	%		20	%
Customer B		14	%		2	%
Customer C		10	%		8	%

No other customer represented more than 10% of revenue or accounts receivable in the periods presented in the accompanying consolidated financial statements. In fiscal years 2015, 2014, and 2013, ten customers represented an aggregate of 57%, 52% and 47% of total revenue, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Topic 280
-SubTopic 10
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-Paragraph 26
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-Name Accounting Standards Codification
-Topic 280
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 280
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Quarterly Financial Data (Unaudited)

12 Months Ended

Oct. 02, 2015

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

24. QUARTERLY FINANCIAL DATA (UNAUDITED)

(In thousands, except per share data)


	First Quarter			Second Quarter			Third Quarter			Fourth Quarter		Fiscal Year
Fiscal Year 2015
Revenue	$	96,556		$	102,431		$	109,058		$	112,564	$	420,609
Gross profit		47,419			46,714			52,496			56,961		203,590
Income (loss) from continuing operations (1)		(9,963	)		(11,176	)		1,756			13,841		(5,542	)
Income (loss) from discontinued operations (1)		3,657			3,639			6,271			40,564		54,131
Per share data (2)
Income (loss) from continuing operations, basic	$	(0.21	)	$	(0.22	)	$	0.03		$	0.26	$	(0.11	)

Income (loss) from discontinued operations, basic	$	0.08		$	0.07		$	0.12		$	0.76	$	1.06

Per share data (2)
Income (loss) from continuing operations, diluted (3)	$	(0.21	)	$	(0.22	)	$	0.03		$	0.08	$	(0.11	)

Income (loss) from discontinued operations, diluted	$	0.08		$	0.07		$	0.11		$	0.74	$	1.06

Fiscal Year 2014
Revenue	$	64,278		$	87,734		$	93,318		$	93,859	$	339,189
Gross profit		28,408			20,142			43,606			48,784		140,940
Income (loss) from continuing operations		(10,853	)		(23,189	)		(1,350	)		10,578		(24,814	)
Income (loss) from discontinued operations (1)		1,932			1,067			2,533			3,959		9,491
Per share data (2)
Income (loss) from continuing operations, basic	$	(0.23	)	$	(0.50	)	$	(0.03	)	$	0.22	$	(0.53	)

Income (loss) from discontinued operations, basic	$	0.04		$	0.02		$	0.05		$	0.08	$	0.20

Per share data (2)
Income (loss) from continuing operations, diluted	$	(0.23	)	$	(0.50	)	$	(0.03	)	$	0.22	$	(0.53	)

Income (loss) from discontinued operations, diluted	$	0.04		$	0.02		$	0.05		$	0.08	$	0.20

(1)	During the fourth quarter of fiscal year 2015 we divested our Automotive business and during the second quarter of fiscal year 2014, we divested the Mindspeed wireless business.

(2)	Earnings per share calculations for each of the quarters are based on the weighted average number of shares outstanding and included common stock equivalents in each period. Therefore, the sums of the quarters may not necessarily equal the full year earnings per share.

(3)	Diluted income (loss) per shares for the fiscal fourth quarter 2015 excludes $9.7 million related to warrant liability gain.

Subsequent Events	12 Months Ended
Subsequent Events	Oct. 02, 2015
Subsequent Events [Abstract]
Subsequent Events	25. SUBSEQUENT EVENTS On November 17, 2015, we entered into a definitive agreement to acquire FiBest Limited (FiBest), a Japan-based merchant market component supplier of optical sub assemblies, in an all-cash transaction valued at approximately ¥7.3 billion, or $60 million. We expect to fund the purchase price of the acquisition with available cash. Closing is subject to customary closing conditions and is expected to occur during the company’s fiscal first quarter of 2016.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Oct. 02, 2015

Accounting Policies [Abstract]

Principles of Consolidation, Basis of Presentation and Reclassification

Use of Estimates

Discontinued Operations

Foreign Currency Translation and Remeasurement

Cash and Cash Equivalents

Cash and Cash Equivalents—Cash equivalents are primarily composed of short-term, highly-liquid instruments with an original maturity of three months or less.

Investments

Inventories

Property and Equipment

Property and equipment are depreciated or amortized using the straight-line method over the following estimated useful lives:


Asset Classification		Estimated Useful Life In Years
Buildings and improvements		40
Machinery and equipment		2 – 7
Computer equipment and software		2 – 5
Furniture and fixtures		7 – 10
Leasehold improvements		Shorter of useful life or term of lease

Goodwill and Indefinite-lived Intangible Assets

Other Intangible Assets

Impairment of Long-Lived Assets

Revenue Recognition

The table below shows the changes in gross and net distributor revenue and reserve balances associated with the change in estimate for the fiscal year ended October 2, 2015 (in thousands):


	Three Months Ended										Fiscal Year
	January 2, 2015		April 3, 2015		July 3, 2015			October 2, 2015			2015
Gross revenue effect of one-time change in estimate (1)	$	17,028	$	—	$	—		$	—		$	17,028
Gross revenue effect associated with change in estimate (2)		3,636		4,687		(1,687	)		(351	)		6,285

Total gross revenue resulting from change in estimate		20,664		4,687		(1,687	)		(351	)		23,313

Net revenue effect of one-time change in estimate (3)		12,457		—		—						12,457
Net revenue effect associated with change in estimate (4)		2,643		3,686		(1,296	)		(134	)		4,899

Total net revenue resulting from change in estimate		15,100		3,686		(1,296	)		(134	)		17,356

Reserve for future returns and credits (5)	$	5,564	$	1,001	$	(391	)	$	(217	)	$	5,957

(1)	This amount was recorded as deferred revenue as of October 3, 2014.

(2)	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.

(3)	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.

(4)	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.

(5)	This amount reflects the change in the revenue reserve for future returns and credits.

Accounts Receivable Allowances

Accounts Receivable Allowances—The activity in our accounts receivable allowances which include customer returns, doubtful accounts and other items are as follows (in thousands):


	Fiscal year
	2015			2014			2013
Beginning balance	$	725		$	514		$	834
Provisions (recoveries), net		11,010			250			(259	)
Charge-offs		(5,990	)		(39	)		(61	)

Ending balance	$	5,745		$	725		$	514

Research and Development Costs

Research and Development Costs—Costs incurred in the research and development of products are expensed as incurred.

Income Taxes

Earnings Per Share

Fair Value Measurements

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, and accrued liabilities approximate fair value due to the short-term nature of these assets and liabilities.

Contingent Consideration

Share-Based Compensation

Guarantees and Indemnification Obligations

Recent Accounting Pronouncements

Evaluation of Subsequent Events

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Oct. 02, 2015

Accounting Policies [Abstract]

Schedule of Estimated Useful Life

Property and equipment are depreciated or amortized using the straight-line method over the following estimated useful lives:


Asset Classification		Estimated Useful Life In Years
Buildings and improvements		40
Machinery and equipment		2 – 7
Computer equipment and software		2 – 5
Furniture and fixtures		7 – 10
Leasehold improvements		Shorter of useful life or term of lease

Changes in Gross and Net Distributor Revenue and Reserve Balances Associated With Change in Estimate

The table below shows the changes in gross and net distributor revenue and reserve balances associated with the change in estimate for the fiscal year ended October 2, 2015 (in thousands):


	Three Months Ended										Fiscal Year
	January 2, 2015		April 3, 2015		July 3, 2015			October 2, 2015			2015
Gross revenue effect of one-time change in estimate (1)	$	17,028	$	—	$	—		$	—		$	17,028
Gross revenue effect associated with change in estimate (2)		3,636		4,687		(1,687	)		(351	)		6,285

Total gross revenue resulting from change in estimate		20,664		4,687		(1,687	)		(351	)		23,313

Net revenue effect of one-time change in estimate (3)		12,457		—		—						12,457
Net revenue effect associated with change in estimate (4)		2,643		3,686		(1,296	)		(134	)		4,899

Total net revenue resulting from change in estimate		15,100		3,686		(1,296	)		(134	)		17,356

Reserve for future returns and credits (5)	$	5,564	$	1,001	$	(391	)	$	(217	)	$	5,957

(1)	This amount was recorded as deferred revenue as of October 3, 2014.

(2)	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.

(3)	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.

(4)	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.

(5)	This amount reflects the change in the revenue reserve for future returns and credits.

Schedule of Allowance for Doubtful Accounts Related to Accounts Receivable


	Fiscal year
	2015			2014			2013
Beginning balance	$	725		$	514		$	834
Provisions (recoveries), net		5,056			250			(259	)
Charge-offs		(36	)		(39	)		(61	)

Ending balance	$	5,745		$	725		$	514

Acquisitions (Tables)

12 Months Ended

Oct. 02, 2015

Mindspeed Acquisition [Member]

Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed

We completed the allocation of purchase price during the fourth quarter of fiscal 2014, as follows (in thousands):


	Final Allocation
Assets acquired:
Current assets	$	50,612
Intangible assets		138,663
Deferred income taxes		92,881
Other assets		31,788

Total assets acquired		313,944

Liabilities assumed:
Current liabilities		35,270
Debt		40,177
Other long-term liabilities		5,865

Total liabilities assumed		81,312

Net assets acquired		232,632

Consideration:
Cash paid upon closing, net of cash acquired	$	232,028
Fair value of vested awards assumed in acquisition		785

Total consideration		232,813

Goodwill		181

Components of Acquired Intangible Assets on a Preliminary Basis

The elements of the acquired intangible assets were as follows (in thousands):


	Amount		Useful Lives (Years)
Developed technology	$	109,263	7
Customer relationships		11,430	10
In-process research and development		17,970	N/A

	$	138,663

Summary of Revenue and Earnings

The following is a summary of Mindspeed revenue and earnings included in our accompanying consolidated statements of operations for fiscal year 2014 (in thousands):


Revenue	$	94,613
Loss from continuing operations before income taxes		(9,266	)

Summary of Unaudited Supplemental Pro Forma Data

This pro forma data is presented for informational purposes only and does not purport to be indicative of our future results of operations.


	Twelve Months Ended
	October 3, 2014			September 27, 2013
	(in thousands)
Revenue	$	358,645		$	380,362
Loss from continuing operations before income taxes		(21,164	)		(43,007	)

BinOptics Corporation [Member]

Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed

The aggregate purchase price for BinOptics is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess of the purchase price over the fair value of the acquired net assets represents cost and revenue synergies specific to the Company, as well as non-capitalizable intangible assets, such as the employee workforce acquired, and has been allocated to goodwill, none of which is tax deductible.


	Original Allocation		Allocation Adjustments			October 2, 2015 Adjusted Allocation
Current assets	$	41,836	$	(18,162	)	$	23,674
Intangible assets		135,254		1,646			136,900
Other assets		14,090		(4,896	)		9,194

Total assets acquired		191,180		(21,412	)		169,768

Liabilities assumed:
Debt		1,491		1,044			2,535
Deferred income taxes		37,745		(4,400	)		33,345
Other liabilities		12,810		296			13,106

Total liabilities assumed		52,046		(3,060	)		48,986

Net assets acquired		139,134		(18,352	)		120,782

Consideration:
Cash paid upon closing, net of cash acquired		224,114		(15,762	)		208,352

Goodwill	$	84,980	$	2,590		$	87,570

Schedule of Reclassification of Allocation Adjustments in Purchase Price Allocation

The $15,762 of allocation adjustments shown above in the “Cash paid upon closing, net of cash acquired” caption consists of the following (in thousands):


	Cash paid upon closing, net of cash acquired
Original Allocation	$	224,114
Reclassification of prepaid compensation		(14,586	)
Reclassification of assumed capital lease debt		(1,044	)
Reclassification of escrow fees		(17	)
Cash received from acquiree related to working capital true-up		(115	)

Allocation Adjustments		(15,762	)

Adjusted Allocations at October 2, 2015	$	208,352

Components of Acquired Intangible Assets on a Preliminary Basis

The components of the acquired intangible assets on a preliminary basis are as follows (in thousands):


	Amount		Useful Lives (Years)
Developed technology	$	17,500		7
Customer relationships		119,400		10

	$	136,900

Summary of Revenue and Earnings

The following is a summary of BinOptics revenue and earnings included in the accompanying consolidated statements of operations for the twelve months ended October 2, 2015 (in thousands):


	Twelve Months Ended October 2, 2015
Revenue	$	61,549
Income before income taxes		354

Summary of Unaudited Supplemental Pro Forma Data

This pro forma data is presented for informational purposes only and does not purport to be indicative of our future results of operations.


	Twelve Months Ended
	October 2, 2015			October 3, 2014
Revenue	$	428,440		$	384,452
Loss from continuing operations before income taxes		(3,489	)		(98,119	)

Investments (Tables)

12 Months Ended

Oct. 02, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Available for Sale Investments

The amortized cost, gross unrealized holding gains or losses, and fair value of our available-for-sale investments by major investments type are summarized in the tables below (in thousands):


	October 2, 2015
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Aggregate Fair Value
Corporate bonds	$	24,546	$	5	$	(89	)	$	24,462
US treasuries and agency bonds		15,108		3		(16	)		15,095

Total investments	$	39,654	$	8	$	(105	)	$	39,557

Summary of Contractual Maturities of Investments

The contractual maturities of available-for-sale investments were as follows (in thousands):


	October 2, 2015
Less than 1 year	$	16,259
Over 1 year		23,298

Total investments	$	39,557

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details

Fair Value (Tables)

12 Months Ended

Oct. 02, 2015

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):


	October 2, 2015
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	15,000	$	15,000	$	—	$	—
US treasuries and agency bonds		15,095		—		15,095		—
Corporate bonds		24,462		—		24,462		—

Total assets measured at fair value	$	54,557	$	15,000	$	39,557	$	—

Liabilities
Contingent consideration	$	1,150	$	—	$	—	$	1,150
Common stock warrant liability		21,822		—		—		21,822

Total liabilities measured at fair value	$	22,972	$	—	$	—	$	22,972


	October 3, 2014
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Trading securities	$	250	$	—	$	—	$	250

Total assets measured at fair value	$	250	$	—	$	—	$	250

Liabilities
Contingent consideration	$	820	$	—	$	—	$	820
Warrant liability		15,801		—		—		15,801

Total liabilities measured at fair value	$	16,621	$	—	$	—	$	16,621

Changes in Liabilities with Inputs Classified within Level 3 of Fair Value

The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):


	Fiscal Year 2015
	October 3, 2014		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements			Transfers in and/or (out) of Level 3		October 2, 2015
Trading securities	$	250	$	—	$	500	$	(750	)	$	—	$	—

Contingent consideration	$	820	$	330	$	—	$	—		$	—	$	1,150

Warrant liability	$	15,801	$	6,021	$	—	$	—		$	—	$	21,822


	Fiscal Year 2014
	September 27, 2013		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		Transfers in and/or (out) of Level 3		October 3, 2014
Trading securities	$	—	$	—	$	250	$	—	$	—	$	250

Contingent consideration	$	—	$	—	$	820	$	—	$	—	$	820

Warrant liability	$	11,873	$	3,928	$	—	$	—	$	—	$	15,801


	Fiscal Year 2013
	September 28, 2012		Net Realized/Unrealized Losses (Gains) Included in Earnings			Purchases and Issuances		Sales and Settlements			Transfers in and/or (out) of Level 3		September 27, 2013
Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—

Warrant liability	$	7,561	$	4,312		$	—	$	—		$	—	$	11,873

Changes in Assets with Inputs Classified within Level 3 of Fair Value

The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):


	Fiscal Year 2015
	October 3, 2014		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements			Transfers in and/or (out) of Level 3		October 2, 2015
Trading securities	$	250	$	—	$	500	$	(750	)	$	—	$	—

Contingent consideration	$	820	$	330	$	—	$	—		$	—	$	1,150

Warrant liability	$	15,801	$	6,021	$	—	$	—		$	—	$	21,822


	Fiscal Year 2014
	September 27, 2013		Net Realized/Unrealized Losses (Gains) Included in Earnings		Purchases and Issuances		Sales and Settlements		Transfers in and/or (out) of Level 3		October 3, 2014
Trading securities	$	—	$	—	$	250	$	—	$	—	$	250

Contingent consideration	$	—	$	—	$	820	$	—	$	—	$	820

Warrant liability	$	11,873	$	3,928	$	—	$	—	$	—	$	15,801


	Fiscal Year 2013
	September 28, 2012		Net Realized/Unrealized Losses (Gains) Included in Earnings			Purchases and Issuances		Sales and Settlements			Transfers in and/or (out) of Level 3		September 27, 2013
Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—

Warrant liability	$	7,561	$	4,312		$	—	$	—		$	—	$	11,873

Inventories (Tables)

12 Months Ended

Oct. 02, 2015

Inventory Disclosure [Abstract]

Components of Inventories

Inventories consist of the following (in thousands):


	October 2, 2015		October 3, 2014
Raw materials	$44,329		$34,919
Work-in-process		3,086		5,500
Finished goods		32,528		31,062

Total	$	79,943	$	71,481

Property, Plant and Equipment (Tables)

12 Months Ended

Oct. 02, 2015

Property, Plant and Equipment [Abstract]

Components of Property, Plant and Equipment

Property, plant and equipment consist of the following (in thousands):


	October 2, 2015			October 3, 2014
Land, buildings and improvements	$	10,981		$	—
Machinery and equipment		89,852			67,427
Leasehold improvements		9,161			7,958
Furniture and fixtures		983			1,017
Construction in process		25,898			12,918
Computer equipment and software		9,307			7,648

Total property and equipment		146,182			96,968
Less accumulated depreciation and amortization		(62,423	)		(46,916	)

Property and equipment — net	$	83,759		$	50,052

Debt (Tables)

12 Months Ended

Oct. 02, 2015

Debt Disclosure [Abstract]

Schedule of Remained Outstanding on Term Loans

As of October 2, 2015, the following remained outstanding on the Term Loans:


Principal balance	$	345,625
Unamortized discount		(2,094	)

		343,531
Current portion		3,500

Long-term, less current portion	$	340,031

Schedule of Minimum Principal Payments under Term Loans

As of October 2, 2015, the minimum principal payments under the Term Loans in future fiscal years was as follows (in thousands):


2016	$	3,500
2017		3,500
2018		3,500
2019		3,500
2020		3,500
Thereafter		328,125

Total	$	345,625

Accrued Liabilities (Tables)

12 Months Ended

Oct. 02, 2015

Text Block [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):


	October 2, 2015		October 3, 2014
Compensation and benefits	$	20,711	$	19,135
Product warranty		656		446
Professional fees		2,167		1,528
Software licenses		1,223		1,862
Distribution costs		3,091		1,757
Restructuring costs		943		801
Interest payable		3,502		2,447
Rent and utilities		1,458		1,658
Other		3,848		3,962

Total	$	37,599	$	33,596

Commitments and Contingencies (Tables)

12 Months Ended

Oct. 02, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Lease Payments for Operating Leases

Future minimum lease payments for the next five fiscal years as of October 2, 2015, are as follows (in thousands):


2016	$	7,343
2017		6,555
2018		5,177
2019		4,836
2020		2,038
Thereafter		4,279

Total minimum lease payments	$	30,228

Restructurings (Tables)

12 Months Ended

Oct. 02, 2015

Restructuring and Related Activities [Abstract]

Summary of Costs Related to Restructuring Actions

The following is a summary of the costs incurred and remaining balances included in accrued expenses related to restructuring actions taken (in thousands):


	Total
Balance — September 28, 2012	$	328
Current period charges		1,060
Payments		(1,243	)

Balance — September 27, 2013		145
Current period charges		14,823
Payments		(14,167	)

Balance — October 3, 2014		801
Current period charges		1,280
Payments		(1,138	)

Balance — October 2, 2015	$	943

Product Warranties (Tables)

12 Months Ended

Oct. 02, 2015

Guarantees [Abstract]

Schedule of Product Warranty Liability Activity

Product warranty liability activity is as follows (in thousands):


	Fiscal Years
	2015		2014			2013
Balance — beginning of year	$	446	$	318		$	549
Impact of acquisition		50		202			—
Provisions		160		(74	)		(49	)
Direct charges		—		—			(182	)

Balance — end of year	$	656	$	446		$	318

Intangible Assets (Tables)

12 Months Ended

Oct. 02, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortization Expense of Intangible Assets

Amortization expense related to amortized intangible assets is as follows (in thousands):


	Fiscal Years
	2015		2014		2013
Cost of revenue	$	27,285	$	18,787	$	2,986
Selling, general and administrative		11,695		1,806		1,335

Total	$	38,980	$	20,593	$	4,321

Summary of Intangible Assets

Intangible assets consist of the following (in thousands):


	October 2, 2015			October 3, 2014
Acquired technology	$	162,536		$	131,953
Customer relationships		144,070			24,670
In-process research and development		8,000			17,970
Trade name		3,400			3,400

Total		318,006			177,993
Less accumulated amortization		(74,340	)		(35,360	)

Intangible assets — net	$	243,666		$	142,633

Summary of Activity in Intangible Assets and Goodwill

A summary of the activity in intangible assets and goodwill follows (in thousands):


	Total			Acquired Technology		Customer Relationships		In-Process Research and Development			Trade Name		Goodwill
Balance at September 27, 2013	$	46,937		$	23,637	$	13,150	$	—		$	3,400	$	6,750
Net intangibles acquired		137,405			103,881		11,520		17,970			—		4,034
Other intangibles purchased		4,435			4,435		—		—			—		—

Balance at October 3, 2014		188,777			131,953		24,670		17,970			3,400		10,784
Net intangibles acquired		224,470			17,500		119,400		—			—		87,570
Placed in service		—			9,780				(9,780	)		—		—
Adjustment to fair value		(190	)		—		—		(190	)		—		—
Goodwill allocation to discontinued operations		(5,008	)		—		—		—			—		(5,008	)
Other intangibles purchased		3,303			3,303		—		—			—		—

Balance at October 2, 2015	$	411,352		$	162,536	$	144,070	$	8,000		$	3,400	$	93,346

Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years

As of October 2, 2015, estimated amortization of the intangible assets in future fiscal years, was as follows (in thousands):


2016	$	43,266
2017		41,741
2018		36,354
2019		31,276
2020		25,779
Thereafter		53,996

Total	$	232,412

Income Taxes (Tables)

12 Months Ended

Oct. 02, 2015

Income Tax Disclosure [Abstract]

Components of Deferred Tax Assets and Liabilities

The components of our deferred tax assets and liabilities are as follows (in thousands):


	October 2, 2015			October 3, 2014
Current deferred tax assets:
Accrued liabilities	$	11,332		$	9,830
Inventory		5,043			8,088
Deferred revenue		(3	)		4,451
Accounts receivable		51			142
Federal net operating loss		11,186			15,452
Other current deferred tax assets		—			46
Discontinued operations		2,703			—
Deferred compensation		3,468			—
Valuation allowance		(2,349	)		(2,052	)

Current net deferred tax assets	$	31,431		$	35,957

Non-current deferred tax assets (liabilities):
Federal and foreign net operating losses and credits	$	70,448		$	128,035
Intangible assets		(44,196	)		(33,158	)
Property and equipment		(2,977	)		(3,072	)
Other non-current deferred tax assets		292			272
Discontinued operations		9,191			—
Deferred compensation		1,066			—
Deferred gain		23,531			—
Valuation allowance		(9,116	)		(7,448	)

Non-current net deferred tax assets (liabilities)		48,239			84,629

Total deferred tax asset	$	79,670		$	120,586

Summary of Domestic and Foreign Income (Loss) from Continuing Operations Before Taxes

The domestic and foreign income (loss) from continuing operations before taxes were as follows (in thousands):


	Fiscal Years
	2015			2014			2013
United States	$	(34,251	)	$	(60,836	)	$	(11,333	)
Foreign		18,851			19,936			14,279

(Loss) income from operations before income taxes	$	(15,400	)	$	(40,900	)	$	2,946

Components of Provision (Benefit) for Income Taxes

The components of the provision (benefit) for income taxes are as follows (in thousands):


	Fiscal Years
	2015			2014			2013
Current:
Federal	$	(19,015	)	$	712		$	2,923
State		688			(419	)		1,024
Foreign		1,092			2,181			986

Current provision (benefit)		(17,235	)		2,474			4,933

Deferred:
Federal		10,845			(16,557	)		(3,326	)
State		(4,131	)		(756	)		(1,146	)
Foreign		(1,302	)		(725	)		(273	)
Change in valuation allowance		1,965			(522	)		95

Deferred provision (benefit)		7,377			(18,560	)		(4,650	)

Total provision (benefit)	$	(9,858	)	$	(16,086	)	$	283

Reconciliation of Effective Tax Rates

Our effective tax rates differ from the federal and statutory rate as follows:


	Fiscal Years
	2015			2014			2013
Federal statutory rate		35.0	%		35.0	%		35.0	%
Foreign rate differential		30.5			11.2			(117.9	)
State taxes net of federal benefit		3.5			1.8			26.0
Warrant liabilities		(13.7	)		(3.4	)		51.2
Change in valuation allowance		(6.0	)		(0.3	)		3.2
Research and development credits		16.1			1.9			(98.6	)
Provision to return adjustments		9.9			—			7.3
Nondeductible compensation expense		(8.9	)		(1.5	)		7.0
Nondeductible legal fees		(4.1	)		(1.9	)		—
Nitronex losses		—			(2.6	)		102.7
Other permanent differences		1.6			(0.8	)		(1.1	)

Effective income tax rate		63.9	%		39.4	%		14.8	%

Activity related to unrecognized tax benefits is as follows (in thousands):


	Amount
Balance — September 27, 2013		—
Additions based on tax positions		(1,670	)
Reductions based on tax positions		—

Balance — October 3, 2014	$	(1,670	)
Additions based on tax positions		—
Reductions based on tax positions		—

Balance — October 2, 2015	$	(1,670	)

Summary of Fiscal Tax Years Examination by Jurisdictions

A summary of the fiscal tax years that remain subject to examination, as of October 2, 2015, for the Company’s significant tax jurisdictions are:


Jurisdiction	Tax Years Subject to Examination
United States — federal		2013 — forward
United States — various states		2012 — forward
Ireland		2012 — forward

Share - Based Compensation Plans (Tables)

12 Months Ended

Oct. 02, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees


	Fiscal Years
	2015		2014		2013
Cost of revenue	$	1,949	$	1,771	$	1,068
Research and development		5,447		2,818		1,739
Selling, general and administrative		12,039		6,688		3,649

Total	$	19,435	$	11,277	$	6,456

Summary of Stock Option Activity

A summary of stock option activity for fiscal year 2015 is as follows (in thousands, except per share amounts):


	Number of Shares			Weighted-Average Exercise Price per Share		Weighted- Average Remaining Contractual Term (in Years)		Aggregate Intrinsic Value
Options outstanding — October 3, 2014		948		$	11.72		6.6	$	10,015

Granted		255			33.60
Exercised		(288	)		9.08
Forfeited, canceled or expired		(26	)		27.11

Options outstanding — October 2, 2015		889		$	18.4		6.19	$	10,574

Options vested and expected to vest — October 2, 2015		889		$	18.4		6.19	$	10,574

Options exercisable — October 2, 2015		644		$	12.63		6.03	$	10,574

Weighted Average Assumptions used for Calculating Fair Value of Stock Options Granted

The weighted-average assumptions used for calculating the fair value of stock options granted is as follows:


Risk-free interest rate	1.2	%
Expected term (years)	4.0
Expected volatility	36.2	%
Expected dividends	—	%

The weighted-average assumptions used for calculating the fair value of stock options granted during fiscal year 2014, is as follows:


Risk-free interest rate	2.71	%
Expected term (years)	10	%
Expected volatility	42.6	%
Expected dividends	—	%

Summary of Restricted Stock and Restricted Stock Units Activity

A summary of restricted stock awards and units activity for fiscal year 2015 is as follows (in thousands):


	Number of Shares			Weighted-Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
Issued and unvested — October 3, 2014		1,720			2.3	$	37,200
Granted		821
Vested		(704	)
Forfeited, canceled or expired		(145	)

Issued and unvested shares — October 2, 2015		1,692			1.4	$	48,375

Shares expected to vest		1,586			1.3	$	45,328

Summary of Performance-Based Restricted Stock Unit Activity

A summary of PRSU activity during the fiscal year ended October 2, 2015 is as follows:


	Non-vested Performance-based Restricted Stock Units		Weighted-Average Grant-Date Fair Value per PRSU
Unvested shares at October 3, 2014		—
Granted		83,954	$	34.39
Change due to performance condition achievement		251,862	$	34.39
Vested		—
Forfeited		—

Unvested shares at October 2, 2015		335,816	$	34.39

Stockholders' Equity (Tables)

12 Months Ended

Oct. 02, 2015

Equity [Abstract]

Summary of Activity of Warrant Liability

The following is a summary of the activity of the warrant liability (in thousands):


Balance — September 27, 2013	$	11,873
Change in estimated fair value		3,928

Balance — October 3, 2014		15,801
Change in estimated fair value		6,021

Balance — October 2, 2015	$	21,822

Discontinued Operations (Tables)

12 Months Ended

Oct. 02, 2015

Discontinued Operations and Disposal Groups [Abstract]

Summary of Operating Results Through Dates of Divestiture Related to Divested Businesses

The accompanying consolidated statement of operations includes the following operating results related to these divested businesses (in thousands):


	Automotive Business									Mindspeed Wireless Business
	Fiscal Years									Fiscal Years
	2015			2014			2013			2015		2014
Revenue	$	71,712		$	79,473		$	80,368		$	—	$	2,439
Cost of revenue		46,931			51,425			53,153			—		1,249

Gross profit		24,781			28,048			27,215			—		1,190
Operating expenses:
Research and development		2,319			2,334			2,083			—		4,531
Selling, general and administrative		2,441			3,586			747			—		1,078
Restructuring charges		—			—			—			—		2,962

Total operating expenses		4,760			5,920			2,830			—		8,571

Income (loss) from discontinued operations		20,021			22,128			24,385			—		(7,381	)
Other income (expense)		4,000			—			—			—		—
Gain on sale		61,771			—			—			1,550		—

Income (loss) before income taxes		85,792			22,128			24,385			1,550		(7,381	)
Income tax provision (benefit)		32,652			8,032			8,852			559		(2,776	)

Income (loss) from discontinued operations	$	53,140		$	14,096		$	15,533		$	991	$	(4,605	)

Above includes depreciation & amortization of	$	189		$	302		$	311		$	—	$	—
Cashflow from Operating Activities	$	(9,513	)	$	16,945		$	11,798		$	991	$	(4,605	)
Cashflow from Investing Activities	$	(505	)	$	(275	)	$	(48	)	$	—	$	—

Earnings Per Share (Tables)

12 Months Ended

Oct. 02, 2015

Earnings Per Share [Abstract]

Computation for Basic and Diluted Net Income (Loss) Per Share of Common Stock

The following table set forth the computation for basic and diluted net income (loss) per share of common stock (in thousands, except per share data):


	Fiscal Years
	2015			2014			2013
Numerator:
Income (loss) from continuing operations	$	(4,597	)	$	(24,814	)	$	2,663
Loss from discontinued operations		54,131			9,491			15,533

Net income (loss)		48,589			(15,323	)		18,196

Warrant liability gain		—			—			—

Net income (loss) attributable to common stockholders	$	48,589		$	(15,323	)	$	18,196

Denominator:
Weighted average common shares outstanding-basic		51,146			47,009			45,916
Dilutive effect of options and warrants		—			—			1,221

Weighted average common shares outstanding-diluted		51,146			47,009			47,137

Common stock earnings per share-basic:
Continuing operations	$	(0.11	)	$	(0.53	)	$	0.06
Discontinued operations		1.06			0.20			0.34

Net common stock earnings per share-basic	$	0.95		$	(0.33	)	$	0.40

Common stock earnings per share-diluted:
Continuing operations	$	(0.11	)	$	(0.53	)	$	0.06
Discontinued operations		1.06			0.20			0.33

Net common stock earnings per share-diluted	$	0.95		$	(0.33	)	$	0.39

Common Equivalent Shares Excluded from Calculation from Net Income Per Share

The following common equivalent shares were excluded from the calculation from net income per share as their inclusion would have been antidilutive (in thousands):


	Fiscal Years
	2015		2014		2013
Stock options and restricted stock		1,342		1,079		—
Warrants		714		329		—

Total common stock equivalent shares excluded		2,056		1,408		—

Supplemental Cash Flow Information (Tables)

12 Months Ended

Oct. 02, 2015

Supplemental Cash Flow Elements [Abstract]

Schedule of Supplemental Cash Flow Information Regarding Noncash Investing and Financing Activities

The following is supplemental cash flow information regarding noncash investing and financing activities:


	Fiscal Years
	2015		2014		2013
Cash paid for interest	$	15,607	$	6,994	$	501
Cash paid for income taxes	$	22,676	$	4,668	$	7,318

Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Oct. 02, 2015

Text Block [Abstract]

Summary of Accumulated Other Comprehensive Income, Net of Income Taxes

The components of accumulated other comprehensive income, net of income taxes, are as follows:


	Foreign currency items			Other items			Total
Balance — September 27, 2013	$	(167	)	$	—		$	(167	)
Foreign currency translation adjustment		(1,097	)		—			(1,097	)
Pension adjustment, net of tax		—			(90	)		(90	)

Balance — October 3, 2014		(1,264	)		(90	)		(1,354	)
Foreign currency translation, net of tax		(918	)		—			(918	)
Other adjustments		—			90			90
Unrealized gain/loss on short term investments		—			(97	)		(97	)

Balance — October 2, 2015	$	(2,182	)	$	(97	)	$	(2,279	)

Geographic and Significant Customer Information (Tables)

12 Months Ended

Oct. 02, 2015

Segment Reporting [Abstract]

Summary of Different Geographic Regions

Information about our operations in different geographic regions, based upon customer locations, is presented below (in thousands):


	Fiscal Years
Revenue by Geographic Region	2015		2014		2013
United States	$	152,974	$	134,436	$	110,686
China		92,493		33,308		21,057
Taiwan		56,421		34,344		10,612
Other countries (1)		118,721		137,101		100,348

Total	$	420,609	$	339,189	$	242,703

(1)	No other international countries represented greater than 10% of total revenue during the periods presented.


	As of
Long-Lived Assets by Geographic Region	October 2, 2015		October 3, 2014
United States	$	72,617	$	41,726
International (1)		11,142		8,326

Total	$	83,759	$	50,052

•

No other international country or region represented greater than 10% of the total net long-lived assets as of the dates presented.

Summary of Customer Concentrations as Percentage of Total Sales and Accounts Receivable

The following is a summary of customer concentrations as a percentage of total sales and accounts receivable as of and for the periods presented:


	Fiscal Years
Revenue	2015			2014			2013
Customer A		18	%		19	%		21	%
Customer B		12	%		10	%		—	%


	October 2, 2015			October 3, 2014
Accounts Receivable	October 2, 2015			October 3, 2014
Customer A		22	%		20	%
Customer B		14	%		2	%
Customer C		10	%		8	%

Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Oct. 02, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Data

(In thousands, except per share data)


	First Quarter			Second Quarter			Third Quarter			Fourth Quarter		Fiscal Year
Fiscal Year 2015
Revenue	$	96,556		$	102,431		$	109,058		$	112,564	$	420,609
Gross profit		47,419			46,714			52,496			56,961		203,590
Income (loss) from continuing operations (1)		(9,963	)		(11,176	)		1,756			13,841		(5,542	)
Income (loss) from discontinued operations (1)		3,657			3,639			6,271			40,564		54,131
Per share data (2)
Income (loss) from continuing operations, basic	$	(0.21	)	$	(0.22	)	$	0.03		$	0.26	$	(0.11	)

Income (loss) from discontinued operations, basic	$	0.08		$	0.07		$	0.12		$	0.76	$	1.06

Per share data (2)
Income (loss) from continuing operations, diluted (3)	$	(0.21	)	$	(0.22	)	$	0.03		$	0.08	$	(0.11	)

Income (loss) from discontinued operations, diluted	$	0.08		$	0.07		$	0.11		$	0.74	$	1.06

Fiscal Year 2014
Revenue	$	64,278		$	87,734		$	93,318		$	93,859	$	339,189
Gross profit		28,408			20,142			43,606			48,784		140,940
Income (loss) from continuing operations		(10,853	)		(23,189	)		(1,350	)		10,578		(24,814	)
Income (loss) from discontinued operations (1)		1,932			1,067			2,533			3,959		9,491
Per share data (2)
Income (loss) from continuing operations, basic	$	(0.23	)	$	(0.50	)	$	(0.03	)	$	0.22	$	(0.53	)

Income (loss) from discontinued operations, basic	$	0.04		$	0.02		$	0.05		$	0.08	$	0.20

Per share data (2)
Income (loss) from continuing operations, diluted	$	(0.23	)	$	(0.50	)	$	(0.03	)	$	0.22	$	(0.53	)

Income (loss) from discontinued operations, diluted	$	0.04		$	0.02		$	0.05		$	0.08	$	0.20

(1)	During the fourth quarter of fiscal year 2015 we divested our Automotive business and during the second quarter of fiscal year 2014, we divested the Mindspeed wireless business.

(2)	Earnings per share calculations for each of the quarters are based on the weighted average number of shares outstanding and included common stock equivalents in each period. Therefore, the sums of the quarters may not necessarily equal the full year earnings per share.

(3)	Diluted income (loss) per shares for the fiscal fourth quarter 2015 excludes $9.7 million related to warrant liability gain.

Summary of Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 02, 2015 USD ($)	Jul. 03, 2015 USD ($)	Apr. 03, 2015 USD ($)	Jan. 02, 2015 USD ($) $ / shares	Oct. 03, 2014 USD ($)	Jul. 04, 2014 USD ($)	Apr. 04, 2014 USD ($)	Jan. 03, 2014 USD ($)	Oct. 02, 2015 USD ($) Segment $ / shares	Oct. 03, 2014 USD ($) $ / shares	Sep. 27, 2013 USD ($) $ / shares	Oct. 02, 2014 USD ($)	Sep. 28, 2012 USD ($)
Description Of Business And Basis Of Presentation [Line Items]
Number of reportable operating segment \| Segment									1
Reporting period description									We have a 52 or 53-week fiscal year ending on the Friday closest to the last day of September. The fiscal year 2015 includes 52 weeks, fiscal year 2014 included 53 weeks and fiscal year 2013 included 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in our fiscal years in the first quarter.
Net revenue	$ 112,564	$ 109,058	$ 102,431	$ 96,556	$ 93,859	$ 93,318	$ 87,734	$ 64,278	$ 420,609	$ 339,189	$ 242,703
Net income (loss)									$ 48,589	$ (15,323)	$ 18,196
Earnings per share \| $ / shares									$ 0.95	$ (0.33)	$ 0.40
Deferred inventory costs	79,943				71,481				$ 79,943	$ 71,481
Allowance for doubtful accounts	5,745				725				$ 5,745	725	$ 514	$ 725	$ 834
Minimum [Member]
Description Of Business And Basis Of Presentation [Line Items]
Definite-lived intangible asset useful life									5 years
Maximum [Member]
Description Of Business And Basis Of Presentation [Line Items]
Definite-lived intangible asset useful life									10 years
Allowance for Sales Returns [Member]
Description Of Business And Basis Of Presentation [Line Items]
Reserve for future rebates and returns	6,000			5,600					$ 6,000
Compensation Credits and Customer Returns Allowance [Member]
Description Of Business And Basis Of Presentation [Line Items]
Allowance for doubtful accounts	5,500				400				5,500	400	300
Allowance for Doubtful Accounts [Member]
Description Of Business And Basis Of Presentation [Line Items]
Allowance for doubtful accounts	200				$ 200				200	$ 200	$ 200
Allocation Adjustments [Member]
Description Of Business And Basis Of Presentation [Line Items]
Net revenue	$ (134)	$ (1,296)	$ 3,686	15,100					17,356
Net income (loss)				$ (8,500)					$ 7,700
Earnings per share \| $ / shares				$ (0.18)					$ 0.15
Deferred inventory costs				$ 4,700
Allocation Adjustments [Member] \| Deferred Revenue [Member]
Description Of Business And Basis Of Presentation [Line Items]
Net revenue				12,400
Allocation Adjustments [Member] \| Distributor Revenue [Member]
Description Of Business And Basis Of Presentation [Line Items]
Net revenue				$ 2,700

Summary of Significant Accounting policies - Schedule of Estimated Useful Life (Detail)	12 Months Ended
	Oct. 02, 2015
Building and Improvements [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	40 years
Leasehold Improvements [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	Shorter of useful life or term of lease
Minimum [Member] \| Machinery and Equipment [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	2 years
Minimum [Member] \| Computer Equipment and Software [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	2 years
Minimum [Member] \| Furniture and Fixtures [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	7 years
Maximum [Member] \| Machinery and Equipment [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	7 years
Maximum [Member] \| Computer Equipment and Software [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	5 years
Maximum [Member] \| Furniture and Fixtures [Member]
Property Plant And Equipment Estimated Useful Lives [Line Items]
Property plant and equipment, Estimated Useful Life	10 years

Summary of Significant Accounting Policies - Changes in Gross and Net Distributor Revenue and Reserve Balances Associated with Chane in Estimate (Detail) - USD ($)
$ in Thousands

3 Months Ended

12 Months Ended

Oct. 02, 2015

Jul. 03, 2015

Apr. 03, 2015

Jan. 02, 2015

Oct. 03, 2014

Jul. 04, 2014

Apr. 04, 2014

Jan. 03, 2014

Oct. 02, 2015

Oct. 03, 2014

Sep. 27, 2013

Change in Accounting Estimate [Line Items]

Total net revenue resulting from change in estimate

$ 112,564

$ 109,058

$ 102,431

$ 96,556

$ 93,859

$ 93,318

$ 87,734

$ 64,278

$ 420,609

$ 339,189

$ 242,703

Allocation Adjustments [Member]

Change in Accounting Estimate [Line Items]

Total gross revenue resulting from change in estimate

(351)

(1,687)

4,687

20,664

23,313

Total net revenue resulting from change in estimate

(134)

(1,296)

3,686

15,100

17,356

Reserve for future returns and credits

^[1]

(217)

(391)

1,001

5,564

5,957

Allocation Adjustments [Member] | One-time Change In Estimate [Member]

Change in Accounting Estimate [Line Items]

Total gross revenue resulting from change in estimate

^[2]

17,028

Total net revenue resulting from change in estimate

^[3]

12,457

Allocation Adjustments [Member] | Change in Accounting Method Accounted for as Change in Estimate [Member]

Change in Accounting Estimate [Line Items]

Total gross revenue resulting from change in estimate

^[4]

(351)

(1,687)

4,687

3,636

6,285

Total net revenue resulting from change in estimate

^[5]

$ (134)

$ (1,296)

$ 3,686

$ 2,643

$ 4,899

[1]	This amount reflects the change in the revenue reserve for future returns and credits.
[2]	This amount was recorded as deferred revenue as of October 3, 2014.
[3]	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.
[4]	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.
[5]	This amount represents the impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.

Summary of Significant Accounting Policies -Schedule of Allowance for Doubtful Accounts Related to Accounts Receivable (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Receivables [Abstract]
Beginning balance	$ 725	$ 514	$ 834
Provision (recoveries), net	5,056	250	(259)
Charge-offs	(36)	(39)	(61)
Ending balance	$ 5,745	$ 725	$ 514

Acquisitons - Additional Information (Detail)			3 Months Ended	12 Months Ended
Acquisitons - Additional Information (Detail)	Dec. 15, 2014 USD ($)	Feb. 13, 2014 USD ($)	Oct. 03, 2014 USD ($) Business $ / shares	Oct. 02, 2015 USD ($) $ / shares	Oct. 03, 2014 USD ($) $ / shares	Dec. 18, 2013 $ / shares
Business Acquisition [Line Items]
Outstanding shares of common stock, par value \| $ / shares			$ 0.001	$ 0.001	$ 0.001
Cash paid upon closing, net of cash acquired				$ 208,352,000	$ 260,875,000
Business acquisition, intangible assets				224,470,000	137,405,000
Contingent purchase price, maximum				1,300,000
Goodwill acquired, deductible for tax purpose				$ 1,700,000
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Date of acquisition				Dec. 15, 2014
Aggregate consideration payable	$ 208,400,000
Business combination cash on hand and incurrence of additional borrowing	100,000,000
Business combination acquisition related costs				$ 9,300,000
Adjusted Allocations				$ (15,762,000)
Weighted-average life of identified intangible assets acquired				9 years 7 months 6 days
Cash paid upon closing, net of cash acquired				$ 208,352,000
Business acquisition, liabilities assumed				48,986,000
Business acquisition, intangible assets				136,900,000
BinOptics Corporation [Member] \| Selling, General and Administrative [Member]
Business Acquisition [Line Items]
Business combination acquisition related costs				4,200,000
BinOptics Corporation [Member] \| Allocation Adjustments [Member]
Business Acquisition [Line Items]
Adjusted Allocations				15,762,000
Cash paid upon closing, net of cash acquired				(15,762,000)
Business acquisition, liabilities assumed				$ (3,060,000)
BinOptics Corporation [Member] \| Retention Escrow Agreement [Member]
Business Acquisition [Line Items]
Aggregate consideration payable	$ 14,600,000
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Date of acquisition				Dec. 18, 2013
Aggregate consideration payable			$ 232,813,000
Business combination acquisition related costs					4,500,000
Weighted-average life of identified intangible assets acquired				7 years
Outstanding shares of common stock, par value \| $ / shares						$ 0.01
Outstanding shares of common stock at a purchase price per share \| $ / shares						$ 5.05
Cash paid upon closing, net of cash acquired			232,028,000	$ 232,000,000
Business acquisition, liabilities assumed			81,312,000	81,300,000	81,312,000
Goodwill acquired, tax deductible				0
The fair value of the assumed options and stock awards				4,100,000
Stock option vested			$ 785,000	800,000	785,000
Restructuring charge and change in control payments					$ 14,100,000
Business acquisition, intangible assets				$ 138,663,000
I.K.E., Incorporated (IKE Micro) and Photonic Controls, LLC (Photonic Controls) [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired \| Business			2
Nitronex LLC [Member]
Business Acquisition [Line Items]
Date of acquisition				Feb. 13, 2014
Business acquisition cost of acquired entity, cash paid		$ 26,100,000
Escrow deposit		$ 3,900,000
GaAs Labs [Member]
Business Acquisition [Line Items]
Escrow agreement expiration period				2015-08
Remaining indemnity escrow fund				$ 500,000
Other Acquisitions [Member]
Business Acquisition [Line Items]
Business acquisition, goodwill				3,900,000
Business acquisition, intangible assets				$ 1,600,000
Other Acquisitions [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Weighted-average life of identified intangible assets acquired				7 years
Other Acquisitions [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Weighted-average life of identified intangible assets acquired				10 years
Photonic Controls [Member]
Business Acquisition [Line Items]
Contingent consideration liability				$ 1,200,000

Acquisitions - Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Dec. 15, 2014	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Consideration:
Cash paid upon closing, net of cash acquired			$ 208,352	$ 260,875
Goodwill		$ 10,784	93,346	10,784
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Current assets			23,674
Intangible assets			136,900
Other assets			9,194
Total assets acquired			169,768
Liabilities assumed:
Debt			2,535
Deferred income taxes			33,345
Other liabilities			13,106
Total liabilities assumed			48,986
Net assets acquired			120,782
Consideration:
Cash paid upon closing, net of cash acquired			208,352
Total consideration	$ 208,400
Goodwill			87,570
BinOptics Corporation [Member] \| Original Allocation [Member]
Business Acquisition [Line Items]
Current assets			41,836
Intangible assets			135,254
Other assets			14,090
Total assets acquired			191,180
Liabilities assumed:
Debt			1,491
Deferred income taxes			37,745
Other liabilities			12,810
Total liabilities assumed			52,046
Net assets acquired			139,134
Consideration:
Cash paid upon closing, net of cash acquired			224,114
Goodwill			84,980
BinOptics Corporation [Member] \| Allocation Adjustments [Member]
Business Acquisition [Line Items]
Current assets			(18,162)
Intangible assets			1,646
Other assets			(4,896)
Total assets acquired			(21,412)
Liabilities assumed:
Debt			1,044
Deferred income taxes			(4,400)
Other liabilities			296
Total liabilities assumed			(3,060)
Net assets acquired			(18,352)
Consideration:
Cash paid upon closing, net of cash acquired			(15,762)
Goodwill			2,590
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Current assets		50,612		50,612
Intangible assets		138,663		138,663
Deferred income taxes		92,881		92,881
Other assets		31,788		31,788
Total assets acquired		313,944		313,944
Liabilities assumed:
Current liabilities		35,270		35,270
Debt		40,177		40,177
Other liabilities		5,865		5,865
Total liabilities assumed		81,312	81,300	81,312
Net assets acquired		232,632		232,632
Consideration:
Cash paid upon closing, net of cash acquired		232,028	232,000
Fair value of vested awards assumed in acquisition		785	$ 800	785
Total consideration		232,813
Goodwill		$ 181		$ 181

Acquisitions - Schedule of Reclassification of Allocation Adjustments in Purchase Price Allocation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Business Acquisition [Line Items]
Cash paid upon closing, net of cash acquired	$ 208,352	$ 260,875
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Original Allocation	224,114
Reclassification of prepaid compensation	(14,586)
Reclassification of assumed capital lease debt	(1,044)
Reclassification of escrow fees	(17)
Cash received from acquiree related to working capital true-up	(115)
Allocation Adjustments	(15,762)
Cash paid upon closing, net of cash acquired	$ 208,352

Acquisitions - Components of Acquired Intangible Assets on a Preliminary Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 224,470	$ 137,405
BinOptics Corporation [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	136,900
Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	138,663
Developed Technology [Member] \| BinOptics Corporation [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 17,500
Acquired intangible assets, Useful Lives	7 years
Developed Technology [Member] \| Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 109,263
Acquired intangible assets, Useful Lives	7 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 119,400	$ 11,520
Customer Relationships [Member] \| BinOptics Corporation [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 119,400
Acquired intangible assets, Useful Lives	10 years
Customer Relationships [Member] \| Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 11,430
Acquired intangible assets, Useful Lives	10 years
In-Process Research and Development [Member] \| Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 17,970

Acquisitions - Summary of Revenue and Earnings (Detail) $ in Thousands	12 Months Ended
	Oct. 02, 2015 USD ($)
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Revenue	$ 61,549
Income (loss) from continuing operations before income taxes	354
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Revenue	94,613
Income (loss) from continuing operations before income taxes	$ (9,266)

Acquisitions - Summary of Unaudited Supplemental Pro Forma Data (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Revenue	$ 428,440	$ 384,452
Loss from continuing operations before income taxes	$ (3,489)	(98,119)
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Revenue		358,645	$ 380,362
Loss from continuing operations before income taxes		$ (21,164)	$ (43,007)

Investments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 02, 2015	Oct. 02, 2015	Oct. 03, 2014
Net Investment Income [Line Items]
Purchase of investment securities	$ 40,200
Impairment of minority equity investment		$ 3,500
Proceeds from sale of minority equity investment		1,500
Other long-term investments			$ 5,000
Other Expense [Member]
Net Investment Income [Line Items]
Impairment of minority equity investment		3,500
Convertible Debt [Member]
Net Investment Income [Line Items]
Minority investment in the convertible debt		$ 500	$ 300

Investments - Summary of Available for Sale Investments (Detail) $ in Thousands	12 Months Ended
	Oct. 02, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 39,654
Gross Unrealized Holding Gains	8
Gross Unrealized Holding Losses	(105)
Aggregate Fair Value	39,557
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	24,546
Gross Unrealized Holding Gains	5
Gross Unrealized Holding Losses	(89)
Aggregate Fair Value	24,462
US Treasuries and Agency Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,108
Gross Unrealized Holding Gains	3
Gross Unrealized Holding Losses	(16)
Aggregate Fair Value	$ 15,095

Investments - Summary of Contractual Maturities of Investments (Detail) $ in Thousands	Oct. 02, 2015 USD ($)
Amortized Cost and Fair Value Debt Securities [Abstract]
Less than 1 year	$ 16,259
Over 1 year	23,298
Total investments	$ 39,557

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 54,557	$ 250
Total liabilities measured at fair value	22,972	16,621
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	24,462
US Treasuries and Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	15,095
Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		250
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	15,000
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	1,150	820
Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	21,822	15,801
Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	15,000
Active Markets for Identical Assets (Level 1) [Member] \| Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	15,000
Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	39,557
Observable Inputs (Level 2) [Member] \| Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	24,462
Observable Inputs (Level 2) [Member] \| US Treasuries and Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	15,095
Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		250
Total liabilities measured at fair value	22,972	16,621
Unobservable Inputs (Level 3) [Member] \| Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value		250
Unobservable Inputs (Level 3) [Member] \| Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	1,150	820
Unobservable Inputs (Level 3) [Member] \| Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	$ 21,822	$ 15,801

Fair Value - Additional Information (Detail)	12 Months Ended
Fair Value - Additional Information (Detail)	Oct. 02, 2015	Oct. 03, 2014
Fair Value Measurements Of Financial Instruments [Line Items]
Expected life of common stock warrants	5 years 2 months 12 days	6 years 2 months 12 days
Expected volatility	36.00%	42.30%
Risk free rate	1.30%	2.16%
Money Market Funds [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Investment maturity	90 days or less

Fair Value - Changes in Assets and Liabilities with Inputs Classified within Level 3 of Fair Value (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in financial asset with inputs classified within Level 3 of the fair value, beginning balance	$ 250
Net Realized/ Unrealized Losses (Gains) Included in Earnings	0	$ 0
Purchases and Issuances	500	250
Sales and Settlements	(750)
Transfers in and/or (out) of Level 3	0	0
Changes in financial asset with inputs classified within Level 3 of the fair value, ending balance		250
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	820		$ 6,580
Net Realized/ Unrealized Losses (Gains) Included in Earnings	330		(577)
Purchases and Issuances		820
Sales and Settlements			(6,003)
Transfers in and/or (out) of Level 3	0	0	0
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	1,150	820
Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	15,801	11,873	7,561
Net Realized/ Unrealized Losses (Gains) Included in Earnings	6,021	3,928	4,312
Transfers in and/or (out) of Level 3	0	0	0
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	$ 21,822	$ 15,801	$ 11,873

Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 44,329	$ 34,919
Work-in-process	3,086	5,500
Finished goods	32,528	31,062
Total	$ 79,943	$ 71,481

Property Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 146,182	$ 96,968
Less accumulated depreciation and amortization	(62,423)	(46,916)
Property and equipment - net	83,759	50,052
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	10,981
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	89,852	67,427
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	9,161	7,958
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	983	1,017
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	25,898	12,918
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 9,307	$ 7,648

Property Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 15.7	$ 14.0	$ 10.5

Debt - Additional Information (Detail) - USD ($)			12 Months Ended
Debt - Additional Information (Detail) - USD ($)	May 08, 2014	Sep. 26, 2013	Oct. 02, 2015	Oct. 03, 2014	Feb. 28, 2015
Debt Instrument [Line Items]
Indebtedness on revolving credit facility		$ 245,000,000	$ 100,000,000	$ 245,000,000
Repayment of outstanding credit facility	$ 245,000,000		100,000,000	245,000,000
Estimated fair value of Term Loans			346,500,000
BinOptics Corporation [Member]
Debt Instrument [Line Items]
Indebtedness on revolving credit facility			100,000,000
Capital lease obligations			2,500,000
Capital lease obligations outstanding amount			1,000,000
Debt acquired			$ 2,535,000
Mindspeed Acquisition [Member]
Debt Instrument [Line Items]
Debt acquired				$ 40,177,000
Term Loans [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date			May 31, 2021
Revolving credit facility maximum borrowing availability	350,000,000
Deferred financing costs	2,100,000
Term loan discount rate			0.75%
Revolving credit facility interest rate			Borrowings under the Revolving Facility bear interest (payable quarterly) at (i) for LIBOR loans, a rate per annum equal to the LIBOR rate, plus an applicable margin in the range of 2.00% to 2.50% (based on our total net leverage ratio being within certain defined ranges); and (ii) for base rate loans, a rate per annum equal to the prime rate, plus an applicable margin in the range of 1.00% to 1.50% (based on our total net leverage ratio being within certain defined ranges).
Line of credit effective interest rate			4.50%
Term loans payment term			The Term Loans are payable in quarterly principal installments equal to 0.25% of the aggregate dollar amount of all Term Loans outstanding at the signing of the Credit Agreement, with the remainder due on the maturity date.
Percentage of quarterly principal installment			0.25%
Principal amount			$ 345,625,000
Term Loans [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Floor rate			0.75%
Applicable margin rate			3.75%
Term Loans [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Floor rate			1.75%
Applicable margin rate			2.75%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date			Sep. 30, 2018
Revolving credit facility amended date			Nov. 05, 2013
Revolving credit facility maximum borrowing availability		$ 300,000,000
Credit facility, remaining borrowing capacity			$ 130,000,000
Debt issuance fee			8,700,000
Unamortized deferred financing costs			$ 6,900,000
Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Percentage of unused line fee			0.25%
Revolving Credit Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin rate			2.00%
Revolving Credit Facility [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin rate			1.00%
Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Percentage of unused line fee			0.375%
Revolving Credit Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin rate			2.50%
Revolving Credit Facility [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin rate			1.50%
Revolving Credit Facility One [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date			May 31, 2019
Revolving credit facility maximum borrowing availability	$ 100,000,000				$ 130,000,000

Debt - Schedule of Remained Outstanding on Term Loans (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Debt Instrument [Line Items]
Current portion	$ 4,058	$ 3,478
Long-term, less current portion	340,504	$ 343,178
Term Loans [Member]
Debt Instrument [Line Items]
Principal balance	345,625
Unamortized discount	(2,094)
Total Term Loans	343,531
Total Term Loans	343,531
Current portion	3,500
Long-term, less current portion	$ 340,031

Debt - Schedule of Minimum Principal Payments under Term Loans (Detail) - Term Loans [Member] $ in Thousands	Oct. 02, 2015 USD ($)
Debt Instrument [Line Items]
2016	$ 3,500
2017	3,500
2018	3,500
2019	3,500
2020	3,500
Thereafter	328,125
Total	$ 345,625

Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Employee Benefit Plan [Line Items]
Employer contribution	$ 0	$ 1,400,000
Foreign Jurisdictions [Member]
Employee Benefit Plan [Line Items]
Discretionary matching contribution	$ 1,000,000	$ 1,000,000	$ 900,000

Accrued Liabilities - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Other Liabilities Disclosure [Abstract]
Compensation and benefits	$ 20,711	$ 19,135
Product warranty	656	446
Professional fees	2,167	1,528
Software licenses	1,223	1,862
Distribution costs	3,091	1,757
Restructuring costs	943	801
Interest payable	3,502	2,447
Rent and utilities	1,458	1,658
Other	3,848	3,962
Total	$ 37,599	$ 33,596

Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Detail) $ in Thousands	Oct. 02, 2015 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2016	$ 7,343
2017	6,555
2018	5,177
2019	4,836
2020	2,038
Thereafter	4,279
Total minimum lease payments	$ 30,228

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Loss Contingencies [Line Items]
Rental expenses	$ 6.5	$ 6.6	$ 4.5
Asset retirement obligation	1.3	$ 1.8	$ 1.0
Outstanding non-cancelable purchase commitments	1.2
Letter of Credit [Member]
Loss Contingencies [Line Items]
Outstanding unused letters of credit	$ 0.4

Restructurings - Summary of Costs Related to Restructuring Actions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Restructuring and Related Activities [Abstract]
Beginning Balance of accrued costs	$ 801	$ 145	$ 328
Current period charges	1,280	14,823	1,060
Payments	(1,138)	(14,167)	(1,243)
Ending Balance of accrued costs	$ 943	$ 801	$ 145

Product Warranties - Additional Information (Detail)	12 Months Ended
Product Warranties - Additional Information (Detail)	Oct. 02, 2015
Minimum [Member]
Product Warranty Liability [Line Items]
Term of product warranties	12 months
Maximum [Member]
Product Warranty Liability [Line Items]
Term of product warranties	60 months

Product Warranties - Schedule of Product Warranty Liability Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Payables and Accruals [Abstract]
Balance - beginning of year	$ 446	$ 318	$ 549
Impact of acquisition	50	202
Provisions	160	(74)	(49)
Direct charges			(182)
Balance - end of year	$ 656	$ 446	$ 318

Intangible Assets - Summary of Amortization Expense of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Finite-Lived Intangible Assets [Line Items]
Total	$ 38,980	$ 20,593	$ 4,321
Cost of Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Total	27,285	18,787	2,986
Selling, General and Administrative [Member]
Finite-Lived Intangible Assets [Line Items]
Total	$ 11,695	$ 1,806	$ 1,335

Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 318,006	$ 177,993
Less accumulated amortization	(74,340)	(35,360)
Intangible assets-net	243,666	142,633
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	162,536	131,953
Less accumulated amortization	(52,000)	(27,800)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	144,070	24,670
Less accumulated amortization	(22,300)	(7,600)
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	8,000	17,970
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 3,400	$ 3,400

Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Balance	$ 188,777	$ 46,937
Net intangibles acquired	224,470	137,405
Adjustment to fair value	(190)
Goodwill allocation to discontinued operations	(5,008)
Other intangibles purchased	3,303	4,435
Balance	411,352	188,777
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	17,970
Net intangibles acquired		17,970
Placed in service	(9,780)
Adjustment to fair value	(190)
Balance	8,000	17,970
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	3,400	3,400
Balance	3,400	3,400
Goodwill [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	10,784	6,750
Net intangibles acquired	87,570	4,034
Goodwill allocation to discontinued operations	(5,008)
Balance	93,346	10,784
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	131,953	23,637
Net intangibles acquired	17,500	103,881
Placed in service	9,780
Other intangibles purchased	3,303	4,435
Balance	162,536	131,953
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	24,670	13,150
Net intangibles acquired	119,400	11,520
Balance	$ 144,070	$ 24,670

Intangible Assets - Summary of Estimated Amortization of Intangible Assets (Detail) $ in Thousands	Oct. 02, 2015 USD ($)
Finite-Lived Intangible Assets, Net [Abstract]
2016	$ 43,266
2017	41,741
2018	36,354
2019	31,276
2020	25,779
Thereafter	53,996
Total	$ 232,412

Intangible Assets - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Jul. 31, 2013	Oct. 02, 2015	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		$ 74,340,000	$ 35,360,000
Maximum potential payments to be made for technology licensing and transfer agreement	$ 9,000,000
Amortization period of acquired technology	2017
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Period of potential payments to be made for technology licensing and transfer agreement	2016-07
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		52,000,000	27,800,000
Cost incurred in licensing and transfer of technology		5,000,000	2,700,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		$ 22,300,000	$ 7,600,000

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Oct. 02, 2015	Oct. 03, 2014
Current deferred tax assets:
Accrued liabilities	$ 11,332	$ 9,830
Inventory	5,043	8,088
Deferred revenue	(3)	4,451
Accounts receivable	51	142
Federal net operating loss	11,186	15,452
Other current deferred tax assets		46
Discontinued operations	2,703
Deferred compensation	3,468
Valuation allowance	(2,349)	(2,052)
Current net deferred tax assets	31,431	35,957
Non-current deferred tax assets (liabilities):
Federal and foreign net operating losses and credits	70,448	128,035
Intangible assets	(44,196)	(33,158)
Property and equipment	(2,977)	(3,072)
Other non-current deferred tax assets	292	272
Discontinued operations	9,191
Deferred compensation	1,066
Deferred gain	23,531
Valuation allowance	(9,116)	(7,448)
Non-current net deferred tax assets (liabilities)	48,239	84,629
Total deferred tax asset	$ 79,670	$ 120,586

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Income Taxes [Line Items]
Valuation allowance amount	$ 2,349	$ 2,052
Tax credit valuation allowance	2,000
Deferred tax credit valuation allowance, state	1,200
Reduction in deferred tax credit	600
Income (loss) from operations before income taxes	$ (15,400)	$ (40,900)	$ 2,946
Effective income tax rate	63.90%	39.40%	14.80%
Undistributed earnings	$ 71,300
UK [Member]
Income Taxes [Line Items]
Deferred research and development tax credit valuation allowance	1,400
Ireland [Member]
Income Taxes [Line Items]
Undistributed earnings	34,800
Grand Cayman [Member]
Income Taxes [Line Items]
Undistributed earnings	24,300
United States-Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforward	193,500
Mindspeed Acquisition [Member]
Income Taxes [Line Items]
Valuation allowance amount	11,500	$ 9,500
Mindspeed Acquisition [Member] \| United States-Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforward	158,900
BinOptics Corporation [Member] \| United States-Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforward	26,200
Prior Acquisitions [Member] \| United States-Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforward	$ 8,400

Income Taxes - Summary of Domestic and Foreign Income (Loss) from Continuing Operations Before Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Income Tax Disclosure [Abstract]
United States	$ (34,251)	$ (60,836)	$ (11,333)
Foreign	18,851	19,936	14,279
(Loss) income from operations before income taxes	$ (15,400)	$ (40,900)	$ 2,946

Income Taxes - Components of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Current:
Federal	$ (19,015)	$ 712	$ 2,923
State	688	(419)	1,024
Foreign	1,092	2,181	986
Current provision (benefit)	(17,235)	2,474	4,933
Deferred:
Federal	10,845	(16,557)	(3,326)
State	(4,131)	(756)	(1,146)
Foreign	(1,302)	(725)	(273)
Change in valuation allowance	1,965	(522)	95
Deferred provision (benefit)	7,377	(18,560)	(4,650)
Total provision (benefit)	$ (9,858)	$ (16,086)	$ 283

Income Taxes - Reconciliation of Effective Tax Rates (Detail)	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Foreign rate differential	30.50%	11.20%	(117.90%)
State taxes net of federal benefit	3.50%	1.80%	26.00%
Warrant liabilities	(13.70%)	(3.40%)	51.20%
Change in valuation allowance	(6.00%)	(0.30%)	3.20%
Research and development credits	16.10%	1.90%	(98.60%)
Provision to return adjustments	9.90%		7.30%
Nondeductible compensation expense	(8.90%)	(1.50%)	7.00%
Nondeductible legal fees	(4.10%)	(1.90%)
Nitronex losses		(2.60%)	102.70%
Other permanent differences	1.60%	(0.80%)	(1.10%)
Effective income tax rate	63.90%	39.40%	14.80%

Income Taxes - Activity Related to Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Income Tax Disclosure [Abstract]
Beginning Balance	$ (1,670)
Additions based on tax positions		$ (1,670)
Reductions based on tax positions	0	0
Ending Balance	$ (1,670)	$ (1,670)

Income Taxes - Summary of Fiscal Tax Years Examination by Jurisdictions (Detail)	12 Months Ended
	Oct. 02, 2015
United States-Federal [Member]
Income Taxes And Tax Related [Line Items]
Tax Years Subject to Examination	2013 - forward
United States-Various States [Member]
Income Taxes And Tax Related [Line Items]
Tax Years Subject to Examination	2012 - forward
Ireland [Member]
Income Taxes And Tax Related [Line Items]
Tax Years Subject to Examination	2012 - forward

Share-Based Compensation Plans - Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Non-Employees (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	$ 19,435	$ 11,277	$ 6,096
Cost of Revenue [Member]
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	1,949	1,771	1,068
Research and Development [Member]
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	5,447	2,818	1,739
Selling, General and Administrative [Member]
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	$ 12,039	$ 6,688	$ 3,649

Share-Based Compensation Plans - Additional Information (Detail) $ / shares in Units, $ in Thousands	1 Months Ended				3 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares	May 31, 2015 USD ($) $ / shares shares	Apr. 30, 2015 USD ($) $ / shares shares	Apr. 30, 2014 USD ($) $ / shares shares	Oct. 02, 2015 USD ($) Employees $ / shares shares	Apr. 03, 2015 USD ($) $ / shares	Oct. 03, 2015 USD ($)	Oct. 02, 2015 USD ($) Plans $ / shares shares	Oct. 03, 2014 USD ($) shares	Oct. 02, 2014 USD ($)	Sep. 27, 2013 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans \| Plans								3
Stock-based compensation								$ 19,435	$ 11,277		$ 6,096
Stock options granted targeted vesting period				10 years
Total intrinsic value of options exercised								$ 7,100	$ 7,600		8,400
Stock options granted \| shares								255,000
Stock options granted, fair value				$ 3,500
Weighted-Average Exercise Price per Share, Granted \| $ / shares								$ 33.60
Compensation cost expected to be recognized				3 years				3 years 4 months 24 days
Target price per share for any remaining unamortized compensation cost that will be recognized \| $ / shares				$ 32.55		$ 32.55
Compensation expense to be recognized						$ 2,500
Aggregate Intrinsic Value, Shares expected to vest					$ 45,328			$ 45,328
Fair value of restricted stock awards and units vesting, total							$ 23,300			$ 9,200	3,900
Number of employees \| Employees					20
Stock compensation expense					$ 1,200
Total unrecognized compensation cost					$ 37,800			$ 37,800
Common stock, Issued \| shares					52,958,000			52,958,000	47,548,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price per share \| $ / shares						$ 34.79
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted targeted vesting period								4 years
Percentage of options granted to vest at the end of one year								25.00%
Exercisable period of options granted								7 years
Shares available for future grants \| shares					9,000,000			9,000,000
Percentage of change in control plan			100.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable period of options granted								10 years
Stock options granted \| shares				405,000
Percentage of change in control plan			200.00%
Automotive Divestiture [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation								$ 400	$ 300		$ 100
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted \| shares	30,000
Stock options granted, fair value	$ 400
Exercise price \| $ / shares	$ 29.80
Target price at closing \| $ / shares	63.60
Estimated fair value of stock options \| $ / shares	$ 12.38
Consecutive trading days	3 days
Increase in common stock available for issuance, maximum percentage											4.00%
Increase in common stock available for issuance, shares \| shares								1,900,000			1,900,000
2012 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum payroll deductions to purchase shares of the Company's common stock at a discount								15.00%
Initial Offering Period								In administering the ESPP, the board of directors has limited discretion to set the length of the offering periods thereunder.
Common stock, Issued \| shares					176,000			176,000	150,000
Increase in common stock available for issuance, maximum percentage											1.25%
Increase in common stock available for issuance, shares \| shares								550,000			550,000
Performance Based Restricted Stock Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable period of options granted								7 years
Stock options granted \| shares		225,000	225,000
Stock options granted, fair value		$ 2,000	$ 2,000
Weighted-average grant-date fair value per PRSU, non-vested \| $ / shares		$ 10.12	$ 10.35		$ 34.39			$ 34.39
Weighted-Average Exercise Price per Share, Granted \| $ / shares								$ 34.06
Performance Based Restricted Stock Unit Awards [Member] \| Minimum [Member] \| Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earning percentage of targeted shares								0.00%
Performance Based Restricted Stock Unit Awards [Member] \| Minimum [Member] \| Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earning percentage of targeted shares								0.00%
Performance Based Restricted Stock Unit Awards [Member] \| Minimum [Member] \| Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earning percentage of targeted shares								0.00%
Performance Based Restricted Stock Unit Awards [Member] \| Maximum [Member] \| Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earning percentage of targeted shares								300.00%
Performance Based Restricted Stock Unit Awards [Member] \| Maximum [Member] \| Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earning percentage of targeted shares								300.00%
Performance Based Restricted Stock Unit Awards [Member] \| Maximum [Member] \| Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Earning percentage of targeted shares								300.00%
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock awards and units vesting, total								$ 7,800

Share-Based Compensation Plans - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Aggregate Intrinsic Value Options outstanding, Beginning balance		$ 10,015
Number of Shares, Granted	255
Number of Shares, Exercised	(288)
Number of Shares, Forfeited, canceled or expired	(26)
Number of Shares, Options outstanding - Ending Balance	889
Number of Shares, Options vested and expected to vest - October 2, 2015	889
Number of Shares, Options exercisable - October 2, 2015	644
Weighted-Average Exercise Price per Share, Granted	$ 33.60
Weighted-Average Exercise Price per Share, Exercised	9.08
Weighted-Average Exercise Price per Share, Forfeited, canceled or expired	27.11
Weighted-Average Exercise Price per Share, Options outstanding, Ending balance	18.4
Weighted-Average Exercise Price per Share, Options vested and expected to vest - October 2, 2015	18.4
Weighted-Average Exercise Price per Share, Options exercisable - October 2, 2015	$ 12.63
Weighted-Average Remaining Contractual Term (in Years), Options outstanding	6 years 2 months 9 days	6 years 7 months 6 days
Weighted-Average Remaining Contractual Term (in Years), Options vested and expected to vest - October 2, 2015	6 years 2 months 9 days
Weighted-Average Remaining Contractual Term (in Years), Options exercisable - October 2, 2015	6 years 11 days
Aggregate Intrinsic Value Options outstanding, Ending balance	$ 10,574
Aggregate Intrinsic Value, Options vested and expected to vest - October 2, 2015	10,574
Aggregate Intrinsic Value, Options exercisable - October 2, 2015	$ 10,574

Share-Based Compensation Plans - Weighted Average Assumptions used for Calculating Fair Value of Stock Options Granted (Detail)	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	1.20%	2.71%
Expected term (years)	4 years	10 years
Expected volatility	36.20%	42.60%
Expected dividends	0.00%	0.00%

Share-Based Compensation Plans - Summary of Restricted Stock and Restricted Stock Units Activity (Detail) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 02, 2015 USD ($) shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Shares, Granted	821
Number of Shares, Vested	(704)
Number of Shares, Forfeited, canceled or expired	(145)
Number of Shares, Issued and unvested shares - ending balance	1,692
Number of Shares, Shares expected to vest	1,586
Weighted-Average Remaining Contractual Term in Years, Issued and unvested - October 3, 2014	2 years 3 months 18 days
Weighted-Average Remaining Contractual Term in Years, Issued and unvested shares -October 2, 2015	1 year 4 months 24 days
Weighted-Average Remaining Contractual Term in Years, Shares expected to vest	1 year 3 months 18 days
Aggregate Intrinsic Value, Issued and unvested shares - Ending Balance \| $	$ 48,375
Aggregate Intrinsic Value, Shares expected to vest \| $	$ 45,328

Share-Based Compensation - Summary of Performance-Based Restricted Stock Unit Activity (Detail) shares in Thousands	12 Months Ended
	Oct. 02, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted	821
Number of Shares, Vested	704
Number of Shares, Forfeited	145
Number of Shares, Issued and unvested shares - ending balance	1,692
Performance Based Restricted Stock Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted	83,954
Number of Shares, Change due to performance condition achievement	251,862
Number of Shares, Vested	0
Number of Shares, Forfeited	0
Number of Shares, Issued and unvested shares - ending balance	335,816
Weighted-Average Grant-Date Fair Value per PRSU, Granted \| $ / shares	$ 34.39
Weighted-Average Grant-Date Fair Value per PRSU, Change due to performance condition achievement \| $ / shares	34.39
Weighted-Average Grant-Date Fair Value per PRSU, Vested \| $ / shares	0
Weighted-Average Grant-Date Fair Value per PRSU, Forfeited \| $ / shares	0
Weighted-Average Grant-Date Fair Value per PRSU, Non-vested - ending balance \| $ / shares	$ 34.39

Stockholders' Equity - Additional Information (Detail) - $ / shares	1 Months Ended
	Mar. 31, 2012	Oct. 02, 2015	Oct. 03, 2014
Class of Warrant or Right [Line Items]
Unvested shares of restricted common stock excluded from outstanding shares		11,000	59,000
Common stock warrants per share	$ 14.05
Warrants expire	Dec. 21, 2020
Common Stock [Member]
Class of Warrant or Right [Line Items]
Common stock warrants	1,281,358

Stockholders' Equity - Summary of Activity of Warrant Liability (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Statement of Stockholders' Equity [Abstract]
Beginning Balance	$ 15,801	$ 11,873
Change in estimated fair value	6,021	3,928
Ending Balance	$ 21,822	$ 15,801

Related-Party Transactions - Additional Information (Detail) - USD ($)	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Privately Held Company [Member]
Related Party Transaction [Line Items]
Other income-related party	$ 1,100,000	$ 200,000	$ 200,000
GaAs Labs [Member]
Related Party Transaction [Line Items]
Minimum service requirements or payment obligations	$ 0
Notice period to terminate agreement	30 days
Other income-related party	$ 0	$ 100,000	$ 400,000

Discontinued Operations - Additional information (Detail) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2014	Oct. 02, 2015	Oct. 02, 2015	Oct. 03, 2014	Aug. 17, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale of non-core assets			$ 81,208,000	$ 12,345,000
Gain (loss) on sale of business			63,256,000
Automotive Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration on sale of business		$ 82,100,000	82,100,000		$ 82,100,000
Working capital and other adjustments payable		$ 18,000,000
Pending resolution contingencies period under indemnification agreement		18 months
Pre tax gain on sale of business		$ 61,800,000
Automotive Business [Member] \| Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional cash proceeds to be received from revenue based earnout		$ 30,000,000
Consulting Agreement [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non design advisory services period		2 years
Consulting Agreement [Member] \| Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration on sale of business		$ 15,000,000	15,000,000
Mindspeed Wireless Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre tax gain on sale of business			1,600,000
Cash proceeds from sale of non-core assets			$ 3,100,000	12,300,000
Product Line One [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale of non-core assets				$ 12,000,000
Gain (loss) on sale of business	$ 0

Discontinued Operations - Summary of Operating Results Through Dates of Divestiture Related to Divested Businesses (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Jan. 02, 2015	Oct. 03, 2014	Jul. 04, 2014	Apr. 04, 2014	Jan. 03, 2014	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Operating expenses:
Income (loss) from discontinued operations	$ 40,564	$ 6,271	$ 3,639	$ 3,657	$ 3,959	$ 2,533	$ 1,067	$ 1,932	$ 54,131	$ 9,491	$ 15,533
Automotive Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue									71,712	79,473	80,368
Cost of revenue									46,931	51,425	53,153
Gross profit									24,781	28,048	27,215
Operating expenses:
Research and development									2,319	2,334	2,083
Selling, general and administrative									2,441	3,586	747
Total operating expenses									4,760	5,920	2,830
Income (loss) from discontinued operations									20,021	22,128	24,385
Other income (expense)									4,000
Gain on sale									61,771
Income (loss) before income taxes									85,792	22,128	24,385
Income tax provision (benefit)									32,652	8,032	8,852
Income (loss) from discontinued operations									53,140	14,096	15,533
Above includes depreciation & amortization of									189	302	311
Cashflow from Operating Activities									(9,513)	16,945	11,798
Cashflow from Investing Activities									(505)	(275)	$ (48)
Mindspeed Wireless Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue										2,439
Cost of revenue										1,249
Gross profit										1,190
Operating expenses:
Research and development										4,531
Selling, general and administrative										1,078
Restructuring charges										2,962
Total operating expenses										8,571
Income (loss) from discontinued operations										(7,381)
Gain on sale									1,550
Income (loss) before income taxes									1,550	(7,381)
Income tax provision (benefit)									559	(2,776)
Income (loss) from discontinued operations									991	(4,605)
Cashflow from Operating Activities									$ 991	$ (4,605)

Earnings Per Share - Computation for Basic and Diluted Net Income (Loss) Per Share of Common Stock (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Jan. 02, 2015	Oct. 03, 2014	Jul. 04, 2014	Apr. 04, 2014	Jan. 03, 2014	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Numerator:
Income (loss) from continuing operations	$ 13,841	$ 1,756	$ (11,176)	$ (9,963)	$ 10,578	$ (1,350)	$ (23,189)	$ (10,853)	$ (5,542)	$ (24,814)	$ 2,663
Loss from discontinued operations	40,564	$ 6,271	$ 3,639	$ 3,657	$ 3,959	$ 2,533	$ 1,067	$ 1,932	54,131	9,491	15,533
Net income (loss)									48,589	(15,323)	18,196
Warrant liability gain	$ 9,700								0	0	0
Net income (loss) attributable to common stockholders									$ 48,589	$ (15,323)	$ 18,196
Denominator:
Weighted average common shares outstanding-basic									51,146	47,009	45,916
Weighted average common shares outstanding-diluted									51,146	47,009	47,137
Basic income (loss) per common share:
Continuing operations	$ 0.26	$ 0.03	$ (0.22)	$ (0.21)	$ 0.22	$ (0.03)	$ (0.50)	$ (0.23)	$ (0.11)	$ (0.53)	$ 0.06
Discontinued operations									1.06	0.20	0.34
Net income (loss) - basic									0.95	(0.33)	0.40
Diluted income (loss) per common share:
Continuing operations	$ 0.08	$ 0.03	$ (0.22)	$ (0.21)	$ 0.22	$ (0.03)	$ (0.50)	$ (0.23)	(0.11)	(0.53)	0.06
Discontinued operations									1.06	0.20	0.33
Net income (loss) - diluted									$ 0.95	$ (0.33)	$ 0.39
Stock Options Restricted Stock and Warrants [Member]
Denominator:
Dilutive effect of options and warrants											1,221

Earnings Per Share - Common Equivalent Shares Excluded from Calculation from Net Income Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalent shares excluded	2,056	1,408
Stock Options and Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalent shares excluded	1,342	1,079
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalent shares excluded	714	329

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information Regarding Noncash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Cash paid for interest	$ 15,607	$ 6,994	$ 501
Cash paid for income taxes	$ 22,676	$ 4,668	$ 7,318

Supplemental Cash Flow Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unpaid amounts related to purchase of assets	$ 3.2	$ 2.4
Mindspeed Acquisition [Member]
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assumed indebtedness		40.2
Debt paid		$ 40.2

Accumulated Other Comprehensive Income - Summary of Accumulated Other Comprehensive Income, Net of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	$ (1,354)	$ (167)
Foreign currency translation adjustment	(918)	(1,097)	$ (30)
Pension adjustment, net of tax		(90)
Other adjustments	90	(90)
Unrealized gain/loss on short term investments	(97)
Accumulated other comprehensive income, ending balance	(2,279)	(1,354)	(167)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	(1,264)	(167)
Foreign currency translation adjustment	(918)	(1,097)
Accumulated other comprehensive income, ending balance	(2,182)	(1,264)	$ (167)
Other Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, beginning balance	(90)
Pension adjustment, net of tax		(90)
Other adjustments	90
Unrealized gain/loss on short term investments	(97)
Accumulated other comprehensive income, ending balance	$ (97)	$ (90)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details

Geographic and Significant Customer Information - Additional Information (Detail)	12 Months Ended
	Oct. 02, 2015 Segment Customer	Oct. 03, 2014	Sep. 27, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable operating segment \| Segment	1
Number of major customers \| Customer	10
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	57.00%	52.00%	47.00%

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Detail) - USD ($)
$ in Thousands

3 Months Ended

12 Months Ended

Oct. 02, 2015

Jul. 03, 2015

Apr. 03, 2015

Jan. 02, 2015

Oct. 03, 2014

Jul. 04, 2014

Apr. 04, 2014

Jan. 03, 2014

Oct. 02, 2015

Oct. 03, 2014

Sep. 27, 2013

Revenues from External Customers and Long-Lived Assets [Line Items]

Revenue by Geographic Region

$ 112,564

$ 109,058

$ 102,431

$ 96,556

$ 93,859

$ 93,318

$ 87,734

$ 64,278

$ 420,609

$ 339,189

$ 242,703

Long-Lived Assets by Geographic Region

83,759

50,052

83,759

50,052

United States [Member]

Revenues from External Customers and Long-Lived Assets [Line Items]

Revenue by Geographic Region

152,974

134,436

110,686

Long-Lived Assets by Geographic Region

72,617

41,726

72,617

41,726

China [Member]

Revenues from External Customers and Long-Lived Assets [Line Items]

Revenue by Geographic Region

92,493

33,308

21,057

Taiwan [Member]

Revenues from External Customers and Long-Lived Assets [Line Items]

Revenue by Geographic Region

56,421

34,344

10,612

Other Countries [Member]

Revenues from External Customers and Long-Lived Assets [Line Items]

Revenue by Geographic Region

^[1]

118,721

137,101

$ 100,348

International [Member]

Revenues from External Customers and Long-Lived Assets [Line Items]

Long-Lived Assets by Geographic Region

^[2]

$ 11,142

$ 8,326

$ 11,142

$ 8,326

[1]	No other international countries represented greater than 10% of total revenue during the periods presented.
[2]	No other international country or region represented greater than 10% of the total net long-lived assets as of the dates presented.

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Parenthetical) (Detail)	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic segment long-lived assets threshold	10.00%	10.00%
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	57.00%	52.00%	47.00%
International [Member] \| Sales Revenue, Net [Member] \| Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Total Sales and Accounts Receivable (Detail) - Customer Concentration Risk [Member]	12 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	57.00%	52.00%	47.00%
Customera [Member] \| Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	18.00%	19.00%	21.00%
Customera [Member] \| Accounts Receivable [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	22.00%	20.00%
Customer B [Member] \| Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	12.00%	10.00%
Customer B [Member] \| Accounts Receivable [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	14.00%	2.00%
Customer C [Member] \| Accounts Receivable [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	10.00%	8.00%

Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Jan. 02, 2015	Oct. 03, 2014	Jul. 04, 2014	Apr. 04, 2014	Jan. 03, 2014	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 112,564	$ 109,058	$ 102,431	$ 96,556	$ 93,859	$ 93,318	$ 87,734	$ 64,278	$ 420,609	$ 339,189	$ 242,703
Gross profit	56,961	52,496	46,714	47,419	48,784	43,606	20,142	28,408	203,590	140,940	109,198
Income (loss) from continuing operations	13,841	1,756	(11,176)	(9,963)	10,578	(1,350)	(23,189)	(10,853)	(5,542)	(24,814)	2,663
Income (loss) from discontinued operations	$ 40,564	$ 6,271	$ 3,639	$ 3,657	$ 3,959	$ 2,533	$ 1,067	$ 1,932	$ 54,131	$ 9,491	$ 15,533
Per share data
Income (loss) from continuing operations, basic	$ 0.26	$ 0.03	$ (0.22)	$ (0.21)	$ 0.22	$ (0.03)	$ (0.50)	$ (0.23)	$ (0.11)	$ (0.53)	$ 0.06
Income (loss) from discontinued operations, basic	0.76	0.12	0.07	0.08	0.08	0.05	0.02	0.04	1.06	0.20	0.34
Per share data
Income (loss) from continuing operations, diluted	0.08	0.03	(0.22)	(0.21)	0.22	(0.03)	(0.50)	(0.23)	(0.11)	(0.53)	0.06
Income (loss) from discontinued operations, diluted	$ 0.74	$ 0.11	$ 0.07	$ 0.08	$ 0.08	$ 0.05	$ 0.02	$ 0.04	$ 1.06	$ 0.20	$ 0.33

Quarterly Financial Data - Schedule of Quarterly Financial Data (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 02, 2015	Oct. 02, 2015	Oct. 03, 2014	Sep. 27, 2013
Quarterly Financial Information Disclosure [Abstract]
Warrant liability gain	$ 9,700	$ 0	$ 0	$ 0

Subsequent Events - Additional Information (Detail) - Nov. 17, 2015 $ in Millions, ¥ in Billions	USD ($)	JPY (¥)
FiBest Limited [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Acquisition of business, cash transaction value	$ 60.0	¥ 7.3

Label	Element	Value
Product Warranty Accrual	us-gaap_ProductWarrantyAccrual	$ 446,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	$ 11.72
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1,720,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	948,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested	$ 37,200,000
Common Stock Warrant Liability [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	15,801,000
Contingent Consideration [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	820,000
Trading Securities [Member]
Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Asset Value	mtsi_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisAssetValue	$ 250,000