MACOM Technology Solutions (MTSI) 10-K 5 Dec 13 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 27, 2013	Nov. 29, 2013	Mar. 29, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	27-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'M/A-COM Technology Solutions Holdings, Inc.	'	'
Entity Central Index Key	'0001493594	'	'
Current Fiscal Year End Date	'--09-27	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	46,646,805	'
Entity Public Float	'	'	$331.50

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$110,446	$84,528
Accounts receivable, net	62,961	54,184
Inventories	53,995	57,459
Income taxes receivable	915	4,939
Prepaid expenses and other current assets	6,153	3,660
Deferred income taxes	10,404	8,264
Total current assets	244,874	213,034
Property and equipment, net	31,563	30,209
Goodwill	3,990	3,990
Intangible assets, net	17,899	18,776
Other assets	5,905	2,064
Total assets	304,231	268,073
Current liabilities:	'	'
Accounts payable	25,313	26,958
Accrued liabilities	16,164	13,867
Income taxes payable	20	330
Deferred revenue	9,030	7,992
Contingent consideration	'	6,580
Total current liabilities	50,527	55,727
Common stock warrant liability	11,873	7,561
Other long-term liabilities	3,022	1,236
Deferred income taxes	1,985	4,091
Total liabilities	67,407	68,615
Commitments and contingencies (Note 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; 46,493 and 45,583 shares issued and 46,470 and 45,540 shares outstanding as of September 27, 2013 and September 28, 2012, respectively, of which 74 and 131 shares, respectively, are subject to forfeiture	46	45
Accumulated other comprehensive loss	-167	-137
Additional paid-in capital	357,700	347,971
Treasury stock, 23 and 43 shares of common stock as of September 27, 2013 and September 28, 2012, respectively, at cost	-330	-685
Accumulated deficit	-120,425	-147,736
Total stockholders' equity	236,824	199,458
Total liabilities and stockholders' equity	$304,231	$268,073

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, except Per Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Preferred stock, Par value	$0.00	$0.00
Preferred stock, Authorized	10,000	10,000
Preferred stock, Issued	0	0
Common stock, Par value	$0.00	$0.00
Common stock, Authorized	300,000	300,000
Common stock, Issued	46,493	45,583
Common stock, Outstanding	46,470	45,540
Common stock, Forfeiture	74	131
Treasury stock, Shares	23	43

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Income Statement [Abstract]	'	'	'
Revenue	$318,718	$302,203	$310,295
Cost of revenue	179,019	167,301	178,435
Gross profit	139,699	134,902	131,860
Operating expenses:	'	'	'
Research and development	40,631	35,817	36,121
Selling, general and administrative	50,242	44,754	48,103
Litigation settlement	7,250	'	'
Contingent consideration	-577	-3,922	210
Restructuring charges	950	1,862	1,499
Total operating expenses	98,496	78,511	85,933
Income from operations	41,203	56,391	45,927
Other (expense) income:	'	'	'
Warrant liability (expense) gain	-4,312	3,175	-5,080
Class B conversion liability expense	'	-44,119	-39,737
Interest expense	-817	-695	-1,561
Other income - related party	372	185	'
Other (expense) income, net	-4,757	-41,454	-46,378
Income (loss) before income taxes	36,446	14,937	-451
Income tax provision	9,135	15,953	1,319
Income (loss) from continuing operations	27,311	-1,016	-1,770
Income from discontinued operations	'	'	754
Net income (loss)	27,311	-1,016	-1,016
Accretion to redemption value of redeemable preferred stock and participating stock dividends	'	-2,616	-80,452
Net income (loss) attributable to common stockholders	$27,311	($3,632)	($81,468)
Basic income (loss) per common share:	'	'	'
Income (loss) from continuing operations	$0.59	($0.15)	($54.63)
Income from discontinued operations	'	'	$0.50
Net income (loss) - basic	$0.59	($0.15)	($54.13)
Diluted income (loss) per common share:	'	'	'
Income (loss) from continuing operations	$0.58	($0.15)	($54.63)
Income from discontinued operations	'	'	$0.50
Net income (loss) - diluted	$0.58	($0.15)	($54.13)
Shares used to compute net income (loss) per common share:	'	'	'
Basic	45,916	24,758	1,505
Diluted	47,137	24,758	1,505

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]	'	'	'
Net income (loss)	$27,311	($1,016)	($1,016)
Foreign currency translation gain (loss)	-30	44	-8
Total comprehensive income (loss)	$27,281	($972)	($1,024)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (Deficit) (USD $)	Total	Series A-1 Convertible Preferred Stock [Member]	Series A-2 Convertible Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
In Thousands, except Share data
Balance at Oct. 01, 2010	$44,655	$100	$17	$1	'	($173)	$70,821	($26,111)
Balance, Shares at Oct. 01, 2010	'	100,000,000	16,822,000	992,000	'	'	'	'
Reclassification of Class A	-106,400	-100	-17	'	'	'	-70,821	-35,462
Reclassification of Class A, Shares	'	-100,000,000	-16,822,000	'	'	'	'	'
Dividends declared	-80,000	'	'	'	'	'	'	-80,000
Issuance of common stock upon exercise of stock options	611	'	'	1	'	'	610	'
Issuance of common stock upon exercise of stock options, Shares	'	'	'	755,000	'	'	'	'
Accretion of preferred stock	-4,236	'	'	'	'	'	-2,167	-2,069
Share-based and other incentive compensation	1,557	'	'	'	'	'	1,557	'
Foreign currency translation	-8	'	'	'	'	-8	'	'
Net income (loss)	-1,016	'	'	'	'	'	'	-1,016
Balance at Sep. 30, 2011	-144,837	'	'	2	'	-181	'	-144,658
Balance, Shares at Sep. 30, 2011	'	'	'	1,747,000	'	'	'	'
Issuance of common stock upon initial public offering, net of costs incurred	93,686	'	'	5	'	'	93,681	'
Issuance of common stock upon initial public offering, net of costs incurred, Shares	'	'	'	5,556,000	'	'	'	'
Conversion of redeemable and convertible preferred stock and Class B conversion liability	310,132	'	'	38	'	'	310,094	'
Conversion of redeemable and convertible preferred stock and Class B conversion liability, Shares	'	'	'	37,677,000	'	'	'	'
Payment of Class B conversion preference	-60,000	'	'	'	'	'	-60,000	'
Reclaim of escrow	247	'	'	'	'	'	247	'
Issuance of common stock upon exercise of stock options	527	'	'	'	'	'	527	'
Issuance of common stock upon exercise of stock options, Shares	'	'	'	366,000	'	'	'	'
Accretion of preferred stock	-2,616	'	'	'	'	'	-554	-2,062
Vesting of restricted common stock and units	'	'	'	'	'	'	'	'
Vesting of restricted common stock and units, Shares	'	'	'	106,000	'	'	'	'
Repurchase of common stock	-685	'	'	'	-685	'	'	'
Repurchase of common stock, Shares	'	'	'	'	43,000	'	'	'
Share-based and other incentive compensation	3,762	'	'	'	'	'	3,762	'
Excess tax benefits	214	'	'	'	'	'	214	'
Foreign currency translation	44	'	'	'	'	44	'	'
Net income (loss)	-1,016	'	'	'	'	'	'	-1,016
Balance at Sep. 28, 2012	199,458	'	'	45	-685	-137	347,971	-147,736
Balance, Shares at Sep. 28, 2012	'	'	'	45,452,000	43,000	'	'	'
Issuance of common stock upon exercise of stock options	605	'	'	1	'	'	604	'
Issuance of common stock upon exercise of stock options, Shares	614,000	'	'	614,000	'	'	'	'
Vesting of restricted common stock and units	'	'	'	'	'	'	'	'
Vesting of restricted common stock and units, Shares	'	'	'	248,000	'	'	'	'
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	'	'	'	131,000	'	'	'	'
Repurchase of common stock	-77	'	'	'	-77	'	'	'
Repurchase of common stock, Shares	'	'	'	'	6,000	'	'	'
Retirement of treasury stock	'	'	'	'	432	'	-432	'
Retirement of treasury stock, Shares	'	'	'	-26,000	-26,000	'	'	'
Share-based and other incentive compensation	6,096	'	'	'	'	'	6,096	'
Excess tax benefits	2,180	'	'	'	'	'	2,180	'
Foreign currency translation	-30	'	'	'	'	-30	'	'
Net income (loss)	27,311	'	'	'	'	'	'	27,311
Balance at Sep. 27, 2013	$236,824	'	'	$46	($330)	($167)	$357,700	($120,425)
Balance, Shares at Sep. 27, 2013	'	'	'	46,419,000	23,000	'	'	'

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) (USD $)	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Convertible Preferred Stock	$0.00	$0.00	'
Series A-1 Convertible Preferred Stock [Member]	'	'	'
Convertible Preferred Stock	$0.00	$0.00	$0.00
Series A-2 Convertible Preferred Stock [Member]	'	'	'
Convertible Preferred Stock	$0.00	$0.00	$0.00

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net income (loss)	$27,311	($1,016)	($1,016)
Adjustments to reconcile net (loss) income to net cash from operating activities (net of acquisition):	'	'	'
Common stock warrant liability expense (gain)	4,312	-3,175	5,080
Class B conversion liability expense	'	44,119	39,737
Depreciation and amortization	13,674	12,504	11,175
Gain on disposition of business, net	'	'	-329
Contingent consideration	-577	-3,922	210
Deferred income taxes	-4,649	1,985	-9,073
Loss on disposal of property and equipment	47	152	903
Stock-based and other noncash incentive compensation	6,096	3,762	1,557
Change in operating assets and liabilities (net of acquisition):	'	'	'
Payment of contingent consideration	-5,328	'	'
Accounts receivable	-8,777	-7,972	-690
Inventories	3,464	-4,979	-7,121
Prepaid expenses and other assets	-4,720	-220	-1,877
Accounts payable	-3,490	7,164	1,547
Accrued and other liabilities	4,686	-904	-7,950
Income taxes	3,714	-7,017	'
Deferred revenue	1,038	-5,127	660
Net cash from operating activities	36,801	35,354	32,813
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Purchases of property and equipment	-11,769	-15,679	-9,781
Purchase of intangible assets	-897	'	'
Acquisition of a business - net of cash acquired	'	'	-1,807
Proceeds from sale of assets	'	'	3,042
Net cash from investing activities	-12,666	-15,679	-8,546
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Proceeds from initial public offering, net of underwriters' discount	'	98,175	'
Payment of Class B preference	'	-60,000	'
Financing and offering costs	-1,527	-3,362	-2,448
Payments on notes payable and revolving credit facility	'	'	-30,000
Payments on capital lease	'	'	-1,426
Proceeds from issuance of convertible preferred stock with warrant and conversion features	'	'	118,680
Excess tax benefits	2,180	214	'
Repurchase of common stock	-77	-685	'
Proceeds from stock option exercises and employee stock purchases	1,886	527	611
Payment of contingent consideration	-675	-15,000	-8,825
Payment of dividends	'	-635	-79,137
Payments to Mimix Holdings, Inc. preferred and common stockholders	-4	-49	'
Net cash from financing activities	1,783	19,185	-2,545
NET INCREASE IN CASH AND CASH EQUIVALENTS	25,918	38,860	21,722
CASH AND CASH EQUIVALENTS - Beginning of year	84,528	45,668	23,946
CASH AND CASH EQUIVALENTS - End of year	110,446	84,528	45,668
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'	'
Cash paid for interest	501	317	1,021
Cash paid for income taxes	$7,318	$19,634	$10,269

Nature_of_Business

Nature of Business	12 Months Ended
	Sep. 27, 2013
Accounting Policies [Abstract]	'
Nature of Business	'
	1. NATURE OF BUSINESS
	M/A-COM Technology Solutions Holdings, Inc. (MACOM or the Company) was incorporated in Delaware on March 25, 2009. MACOM is a provider of high-performance analog semiconductor solutions for use in wireless and wireline applications across the radio frequency (RF), microwave and millimeterwave spectrum. Headquartered in Lowell, Massachusetts, MACOM has offices in North America, Europe, Asia and Australia.
	MACOM’s fiscal year ends on the Friday closest to the last day of September. For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks. The fiscal years presented in the accompanying consolidated financial statements were 52 weeks in length. Unless otherwise indicated, references in the consolidated financial statements to fiscal years 2013, 2012 and 2011 are to the Company’s fiscal years ended September 27, 2013, September 28, 2012 and September 30, 2011, respectively.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Sep. 27, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Principles of Consolidation—The accompanying consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
	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, the Company bases 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 second and third quarters of fiscal year 2011, the Company sold assets of non-core laser diode and ferrite business lines and has segregated the operating results of the divested businesses from continuing operations in fiscal year 2011.
	Foreign Currency Translation and Remeasurement—The Company’s consolidated financial statements are presented in U.S. dollars. While the majority of the Company’s foreign operations use the U.S. dollar as the functional currency, the financial statements of the Company’s 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 the Company’s 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. Revenues 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 (losses) on foreign currency remeasurement are reflected in selling, general and administrative expense in the accompanying consolidated statements of operations. The Company’s recognized net gains and losses on foreign exchange are included in selling, general and administrative expense and 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.
	Accounts Receivable—Accounts receivable are stated net of an allowance for estimated uncollectible accounts, which is determined by establishing reserves for specific accounts and considering historical and estimated probable losses.
	Inventories—Inventories are stated at the lower of cost or market. The Company uses a combination of standard cost and moving weighted-average cost methodologies to determine the cost basis for its 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, the Company also evaluates 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
	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 Intangible Assets—The Company has intangible assets with indefinite and definite lives. Goodwill and the “M/A-COM” trade name are indefinite-lived assets and were acquired through business combinations. 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. 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 intangible assets in any period presented through September 27, 2013. The Company’s other intangible assets, including acquired technology and customer relationships, are definite-lived assets and are subject to amortization. The Company amortizes definite-lived assets over their estimated useful lives, which range from 5 to 10 years, based on the pattern over which the Company expects 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, which includes technology and customer relationships. The Company evaluates 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 an asset for recoverability, the Company estimates the undiscounted cash flows expected to result from the Company’s 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 was no impairment of long-lived assets in any period presented.
	Revenue Recognition—Revenue from the sale of products is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Provided other revenue recognition criteria are met, product revenue is recognized upon transfer of title and risk of loss, which is generally upon shipment. The Company has distribution agreements that provide distributors with rights to return certain products and price protection on certain products. The Company is unable to estimate the amount of its products that may be returned by such distributors, and the ultimate sales price of products sold to such distributors, until the distributors have sold the products to third-party customers, at which point both the return rights and the price protection feature lapse. Accordingly, the Company defers the recognition of revenue on shipments of returnable and price-protected products until the products are sold by the distributors to third-party customers. The Company defers both the revenue recognition and related cost of revenue on these products by recording the revenue as deferred revenue and the associated cost remains recorded in inventory in the accompanying consolidated balance sheets. When these products are sold to a distributor’s customers, the Company recognizes the revenue and associated cost of revenue. As of September 27, 2013 and September 28, 2012, $3.0 million and $3.1 million, respectively, of product costs pertaining to deferred revenue was included in inventories as finished goods in the accompanying consolidated balance sheets. Shipping and handling fees billed to customers are recorded as revenue while the related costs are classified as a component of costs of revenue. The Company provides warranties for its products and accrues the estimated costs of warranty claims in the period the related revenue is recorded.
	Advertising Costs—Advertising costs, which are not material, are expensed as incurred.
	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.
	The Company provides 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 taken by the Company in its tax filings or positions is more likely than not to be realized following an examination by taxing authorities. The Company recognizes 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.
	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 convertible preferred stock, stock options, warrants and restricted stock units, using the treasury stock method.
	Asset Retirement Obligations—The Company recognizes the fair value of a liability for an asset retirement obligation in the period in which it is incurred when a reasonable estimate of fair value can be made. The fair value of the liability is added to the carrying amount of the associated asset and this additional carrying amount is amortized over the life of the asset.
	Changes in the fair value of a liability for an asset retirement obligation due to the passage of time are measured by applying an interest method of allocation. Under this method, changes in fair value due to the passage of time are recognized as an increase in the liability and as accretion expense in the same expense category for which the asset relates. Changes in fair value resulting from revisions to the timing or the amount of the original estimate of undiscounted cash flows are recognized as an increase or a decrease in the carrying amounts of the liability and associated asset.
	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, the Company groups 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 the Company to develop its own assumptions for model-based valuation techniques. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures certain financial assets and liabilities at 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—The Company estimates and records 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, the Company estimates the changes in the fair value of contingent consideration, and any change in fair value is recognized in the consolidated statements of operations. The Company estimates 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—The Company accounts for all share-based compensation arrangements using the fair value method. The Company recognizes 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. The Company records the expense in the consolidated statements of operations in the same manner in which the award recipients’ costs are classified. The Company uses 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. The Company records expense related to awards issued to non-employees over the related service period and periodically revalues the awards as they vest. The Company derives 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. The Company based the assumed dividend yield on its expectation of not paying dividends in the foreseeable future. The Company calculated 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 the Company’s limited operating experience. In addition, due to the Company’s limited historical data, the Company incorporates 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.
	Escrow Arrangements and Outstanding Shares—In fiscal year 2012, 282,681 shares of former Series A-2 convertible preferred stock were canceled in resolution of an indemnification claim against an escrow arrangement in connection with a prior acquisition and all remaining shares were released pursuant to the terms of the escrow. The escrow was terminated upon completion of the IPO in March 2012 and no further shares or amounts are held in escrow.
	Outstanding shares of common stock presented in the accompanying consolidated statements of stockholders’ equity as of September 27, 2013 and September 28, 2012 exclude 74,000 and 131,000 shares, respectively, issued as compensation to employees that were subject to forfeiture, pending continued employment with the Company through stated vesting dates.
	Guarantees and Indemnification Obligations—The Company enters into agreements in the ordinary course of business with, among others, customers, distributors, and original equipment manufacturers (OEM). Most of these agreements require the Company to indemnify the other party against third-party claims alleging that a Company product infringes a patent and/or copyright. Certain agreements in which the Company grants limited licenses to specific Company trademarks require the Company 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 the Company to indemnify the other party against certain claims relating to property damage, personal injury, or the acts or omissions of the Company, its employees, agents, or representatives. In addition, from time to time, the Company has made certain guarantees in the form of warranties regarding the performance of Company products to customers.
	The Company has agreements with certain vendors, creditors, lessors, and service providers pursuant to which the Company has agreed to indemnify the other party for specified matters, such as acts and omissions of the Company, its employees, agents, or representatives.
	The Company has procurement or license agreements with respect to technology that is used in its products and agreements in which the Company obtains rights to a product from an OEM. Under some of these agreements, the Company has agreed to indemnify the supplier for certain claims that may be brought against such party with respect to the Company’s acts or omissions relating to the supplied products or technologies.
	The Company’s certificate of incorporation and agreements with certain of its and its 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, the Company has maintained director and officer liability insurance coverage, including coverage for directors and officers of acquired companies.
	The Company has not experienced any losses related to these indemnification obligations in any period presented, and no claims with respect thereto were outstanding as of September 27, 2013. The Company does not expect significant claims related to these indemnification obligations and, consequently, has concluded that the fair value of these obligations is negligible. No liabilities related to indemnification liabilities have been established.
	Recent Accounting Pronouncements—Under the Jumpstart Our Business Startups Act (JOBS Act), the Company meets the definition of an emerging growth company. The Company has elected to avail itself of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act.
	Evaluation of Subsequent Events—Management has evaluated subsequent events involving the Company 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 these Notes to Consolidated Financial Statements.

Mergers_and_Acquisitions

Mergers and Acquisitions	12 Months Ended
	Sep. 27, 2013
Business Combinations [Abstract]	'
Mergers and Acquisitions	'
	3. MERGERS AND ACQUISITIONS
	Acquisition of the MACOM Business—In connection with the acquisition of the MACOM business in March 2009, the Company became obligated to pay the seller up to $30.0 million as contingent consideration. The amount to be paid to the seller was measured based upon the Company’s qualifying revenue, as defined in the purchase agreement, through September 2012. The Company paid $6.0 million, $15.0 million and $8.8 million in fiscal years 2013, 2012 and 2011, respectively, in full satisfaction of all amounts owed under the arrangement.
	The prior owner of the MACOM business entered into incentive compensation arrangements with certain employees of the Company to induce such employees to remain employed by the Company through September 2012, coinciding with the aforementioned contingent purchase price payment period. Because the Company continued to receive benefits from the employment services of the related employees, the incentive compensation was recorded in the Company’s consolidated financial statements as non-cash incentive compensation expense in the consolidated statements of operations, with the offsetting amount recorded as a capital contribution through an increase in additional paid-in capital. In fiscal year 2013, the Company reversed $360,000 of previously recognized accrued compensation upon termination of the arrangement. In fiscal years 2012 and 2011, the Company expensed $103,000 and $277,000, respectively, pursuant to the terms of the incentive compensation arrangement.
	Acquisition of Optomai, Inc.—On April 25, 2011, the Company acquired Optomai, Inc. (Optomai), a developer of integrated circuits and modules for fiber optic networks located in Sunnyvale, California, in exchange for $1.8 million in cash and potential contingent consideration, as amended, payable to the sellers through November 2013, and the assumption of $260,000 of liabilities. The transaction was accounted for as a purchase. The total fair value of purchase consideration paid in the acquisition by the Company was $6.6 million. The operations of Optomai have been included in the Company’s consolidated financial statements since the date of acquisition. The operations of Optomai were not material and had the business combination occurred as of the earliest period presented, the Company’s revenue and earnings would not have been materially different. The Company acquired Optomai to accelerate its entrance into the fiber optics market.
	The acquisition of the Optomai business was originally accounted for as a nontaxable business combination. As a result of the approval of a change in the tax status of the entity prior to acquisition and the election to treat the business combination as a taxable asset purchase during the three months ended December 30, 2011, the acquired assets received a tax basis equal to fair market value, up to the amount of the purchase consideration. As a result, the difference between book and tax basis was eliminated. The adjustment to the related deferred tax liability resulted in a tax benefit of approximately $1.6 million, which was recorded during fiscal year 2012.
	The Company recognized all assets acquired and liabilities assumed, inclusive of the contingent consideration, based upon the fair value of such assets and liabilities measured as of the date of acquisition. The aggregate purchase price for Optomai was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition as follows (in thousands):
	Assets acquired:
	Property and equipment	$	238
	Other assets		79
	Identifiable intangible assets		4,176
	Total assets acquired		4,493
	Liabilities assumed:
	Deferred tax liability	$	1,599
	Other liabilities		260
	Total liabilities assumed		1,859
	Net assets acquired	$	2,634
	Consideration:
	Cash paid at closing	$	1,807
	Contingent consideration		4,817
	Total consideration		6,624
	Net assets acquired		2,634
	Goodwill	$	3,990
	The components of the acquired intangible assets were as follows (in thousands):
	Technology	$	2,565
	Customer relationships		1,611
		$	4,176
	The overall weighted-average life of the identified intangible assets acquired in the acquisition was seven years and the assets are being amortized over their estimated useful lives based upon the pattern over which the Company expects to receive the economic benefit from these assets.
	In connection with the acquisition of Optomai, the Company became obligated to pay the seller additional purchase consideration should the acquired business’ revenue and product development exceed certain thresholds. The amount to be paid to the seller was to be measured based upon the revenue, contribution margin and product development of the acquired business, as amended, through September 2013. The Company recorded a liability carried at fair value as of each reporting date, with changes in fair value being recorded in earnings. The Company did not make any payment nor is any amount payable related to the earn-out periods that expired in September 2013.
	The changes in fair value of contingent consideration resulting from acquisitions are set below (in thousands):
	Balance — October 2, 2010	$	29,300
	Acquisition of Optomai		4,817
	Payment — MACOM business acquisition		(8,825	)
	Change in fair value		210
	Balance — September 30, 2011		25,502
	Payment — MACOM business acquisition		(15,000	)
	Change in fair value		(3,922	)
	Balance — September 28, 2012		6,580
	Payment — MACOM business acquisition		(6,003	)
	Change in fair value		(577	)
	Balance — September 27, 2013	$	—

Financial_Instruments

Financial Instruments	12 Months Ended
	Sep. 27, 2013
Fair Value Disclosures [Abstract]	'
Financial Instruments	'
	4. FINANCIAL INSTRUMENTS
	Financial liabilities measured at fair value on a recurring basis consist of the following (in thousands):
		September 27, 2013
		Fair Value		Active Markets for			Observable Inputs		Unobservable
				Identical Assets			(Level 2)		Inputs (Level 3)
				(Level 1)
	Common stock warrant liability	$	11,873		—			—	$	11,873
		September 28, 2012
		Fair Value		Active Markets for			Observable Inputs		Unobservable
				Identical Assets			(Level 2)		Inputs (Level 3)
				(Level 1)
	Contingent consideration	$	6,580	$	—		$	—	$	6,580
	Common stock warrant liability	$	7,561	$	—		$	—	$	7,561
	The changes in financial liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):
		Fiscal Year 2013
		September 28,		Net			Purchases		Sales and			Transfers in		September 27,
		2012		Realized/Unrealized			and		Settlements			and/or (out)		2013
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—
	Common stock warrant	$	7,561	$	4,312		$	—	$	—		$	—	$	11,873
		Fiscal Year 2012
		September 30,		Net			Purchases		Sales and			Transfers in		September 28,
		2011		Realized/Unrealized			and		Settlements			and/or (out)		2012
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	25,502	$	(3,922	)	$	—	$	(15,000	)	$	—	$	6,580
	Common stock warrant	$	10,736	$	(3,175	)	$	—	$	—		$	—	$	7,561
	Class B conversion liability	$	81,378	$	44,119		$	—	$	(125,497	)	$	—	$	—
		Fiscal Year 2011
		October 2,		Net			Purchases		Sales and			Transfers in		September 30,
		2010		Realized/Unrealized			and		Settlements			and/or (out)		2011
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	29,300	$	210		$	4,817	$	(8,825	)	$	—	$	25,502
	Common stock warrant	$	—	$	5,080		$	5,656	$	—		$	—	$	10,736
	Class B conversion liability	$	—	$	39,737		$	41,641	$	—		$	—	$	81,378
	The fair values of the contingent consideration liabilities were estimated based upon a risk-adjusted present value of the probability-weighted expected payments by the Company. Specifically, the Company 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.
	For periods prior to March 2012, the fair value of the common stock warrants was estimated based upon a present value of the probability-weighted expected investment returns to the holders. The Company weighted various scenarios of possible investment returns to the holders over the terms of the contracts, such as upon a sale of the Company and upon an initial public offering of its common stock, using a range of potential outcomes. Using the scenarios developed, management considered the likely timing and method of exercise of the warrants and investment returns to the holders. Where a settlement was considered likely in the near term, the probable settlement amounts were weighted. Where the time to exercise was expected to be longer, a Black-Scholes option pricing model was used to estimate the fair value of the warrants, giving consideration to remaining contractual life, expected volatility and risk free rates. The probability-weighted expected settlement of the warrant was discounted to the present using a risk adjusted discount rate. As of September 27, 2013 and September 28, 2012, 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 7.2 years and 8.2 years, expected volatility of 43.5% and 42.9% and risk free rates of 2.02% and 1.4%, respectively. The change in approach to estimation results from the Company’s IPO in March 2012 and the availability of a quoted market price for the common stock underlying the warrants.
	The fair values of the Class B conversion liabilities were estimated based upon a consideration of the estimated fair value of the underlying common stock into which the Class B is convertible, and the expected preferential payments pursuant to the terms of the securities. The Company estimated the fair value of the common stock by using the same probability-weighted scenarios in estimating the fair value of the warrants. For each potential scenario, the value to the Class B was estimated relative to the existing preferences. The amount in excess of the liquidation preferences, if any, was then probability-weighted and discounted to the present using a risk adjusted discount rate. The Class B conversion liabilities were settled upon the closing of the Company’s IPO in March 2012.
	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 the Company’s earnings and such changes could be material.

Allowance_for_Doubtful_Account

Allowance for Doubtful Accounts	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Allowance for Doubtful Accounts	'
	5. ALLOWANCE FOR DOUBTFUL ACCOUNTS
	The activity in the allowance for doubtful accounts related to accounts receivable is as follows (in thousands):
		Fiscal Years
		2013			2012		2011
	Balance — beginning of year	$	699		$	657	$	891
	Provision (recoveries), net		(443	)		42		(116	)
	Charge-offs		(61	)		—		(118	)
	Balance — end of year	$	195		$	699	$	657

Inventories

Inventories	12 Months Ended
	Sep. 27, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	6. INVENTORIES
	Inventories consist of the following (in thousands):
		September 27,		September 28,
		2013		2012
	Raw materials	$	27,643	$	29,922
	Work-in-process		5,740		5,472
	Finished goods		20,612		22,065
	Total	$	53,995	$	57,459
	In the fiscal year 2013, the Company refined its estimation process used to capitalize material and manufacturing variances to inventory to better reflect its current business. This change resulted in a $1.1 million increase to inventory and a corresponding reduction to costs of sales in March 2013.

Property_and_Equipment

Property and Equipment	12 Months Ended
	Sep. 27, 2013
Property Plant And Equipment [Abstract]	'
Property and Equipment	'
	7. PROPERTY AND EQUIPMENT
	Property and equipment consists of the following (in thousands):
		September 27,			September 28,
		2013			2012
	Machinery and equipment	$	46,781		$	38,795
	Leasehold improvements		5,051			4,876
	Furniture and fixtures		720			699
	Construction in process		6,124			4,188
	Computer equipment and software		6,352			6,594
	Total property and equipment		65,028			55,152
	Less accumulated depreciation and amortization		(33,465	)		(24,943	)
	Property and equipment — net	$	31,563		$	30,209
	Depreciation and amortization expense related to property and equipment for fiscal years 2013, 2012 and 2011 was $10.2 million, $8.9 million and $7.8 million, respectively.

Debt

Debt	12 Months Ended
	Sep. 27, 2013
Debt Disclosure [Abstract]	'
Debt	'
	8. DEBT
	Acquisition-Related Debt—In connection with the acquisition of the MACOM Business, the Company issued to the seller a term note payable (Term Note) for $30.0 million, which was paid in full in December 2010.
	Revolving Credit Facility—On September 26, 2013, the Company entered into an amended and restated loan agreement with a syndicate of lenders, which replaced its prior revolving credit facility, and provides for a revolving credit facility of up to $300.0 million that matures in September 2018. Borrowings under the revolving credit facility bear either a variable interest rate equal to (i) the greater of the lender’s prime rate, the federal funds effective rate plus 0.5%, or an adjusted LIBOR plus 1.0%, in each case plus either an additional 1.00%, 1.25% or 1.50%, subject to certain conditions, or (ii) an adjusted LIBOR rate plus either 2.00%, 2.25% or 2.50%, subject to certain conditions. The revolving credit facility is secured by a first priority lien on substantially all of the Company’s assets and requires compliance with certain financial and non-financial covenants, including restrictions on payments of dividends, incurrence of additional debt, levels of capital expenditures, amounts and types of investments, guarantees of debts and obligations, creation of liens, transactions with affiliates, sales or leases of assets, transfers of assets, entering new lines of business and entering into certain merger, consolidation or other reorganization transactions. As of September 27, 2013 and September 28, 2012, there were no outstanding borrowings under the revolving credit facility.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Employee Benefit Plans	'
	9. EMPLOYEE BENEFIT PLANS
	The Company 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. Company contributions to the plan may be made at the discretion of the Company’s board of directors. There were no Company contributions made to the 401(k) Plan for calendar year 2013 through September 27, 2013. Contributions to the 401(k) Plan for calendar years 2012 and 2011 were $1.0 million and $1.1 million, respectively.
	The Company’s 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. The Company expensed contributions of $881,000, $711,000 and $681,000 for fiscal years 2013, 2012 and 2011, respectively.

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Accrued Liabilities	'
	10. ACCRUED LIABILITIES
	Accrued liabilities consist of the following (in thousands):
		September 27,		September 28,
		2013		2012
	Compensation and benefits	$	9,593	$	7,643
	Product warranty		522		866
	Professional fees		1,905		1,132
	Software licenses		1,385		616
	Asset retirement obligations — current portion		270		397
	Distribution costs		641		624
	Restructuring costs		145		328
	Other		1,703		2,261
	Total	$	16,164	$	13,867

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Sep. 27, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	11. COMMITMENTS AND CONTINGENCIES
	Operating Leases—The Company has non-cancelable operating lease agreements for office, research and development and manufacturing space in the United States and foreign locations. The Company also has 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. Any lease escalation clauses, rent abatements and/or concessions, such as rent holidays and landlord or tenant incentives or allowances, are 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 September 27, 2013 are as follows (in thousands):
	2014	$	3,298
	2015		2,820
	2016		2,654
	2017		2,417
	2018		1,570
	Thereafter		5,612
	Total minimum lease payments	$	18,371
	Rent expense incurred under non-cancelable operating leases was $3.6 million, $3.9 million and $4.0 million in fiscal years 2013, 2012 and 2011, respectively. Pursuant to the terms of a facility lease, the Company would be obligated to reimburse a landlord for lease incentives of up to $1.0 million should the Company default on the lease during the term, which expires in January 2018.
	The Company is obligated under certain facility leases to restore those facilities to the condition in which the Company or its predecessors first occupied the facilities. The Company is required to remove leasehold improvements and equipment installed in these facilities prior to termination of the leases. The estimated costs for the removal of these assets are recorded as asset retirement obligations. A summary of the changes in the estimated fair values of the asset retirement obligations is as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Balance — beginning of year	$	949		$	913		$	1,819
	Payments		(1,403	)		(41	)		(705	)
	Accretion expense and settlements		1,323			77			(201	)
	Balance — end of year	$	869		$	949		$	913
	Unused Letter of Credit—As of September 27, 2013, the Company had outstanding unused letters of credit from a bank aggregating $246,000.
	Purchase Commitments—As of September 27, 2013, the Company had outstanding noncancelable purchase commitments aggregating $4.4 million pursuant to inventory supply arrangements.
	Litigation—The Company is periodically subject to legal proceedings, claims and contingencies arising in the ordinary course of business.
	Suits By and Against GigOptix. In April 2011, GigOptix, Inc. (GigOptix) filed a complaint and subsequently a first amended complaint (Complaint) in the Santa Clara County Superior Court against the Company, its subsidiary Optomai, and five of the employees (Ex-Employees) who had previously worked for GigOptix. GigOptix alleged that three of the Ex-Employees began conceptualizing a new business venture in 2009 (which would later become Optomai) before resigning from their employment with GigOptix, and that they used confidential information of GigOptix in their new business. The Complaint sought unspecified damages, attorneys’ fees and costs, and injunctive relief for alleged breach of employment-related agreements, trade secret misappropriation and other related alleged torts by the employee defendants, Optomai and, following its April 2011 acquisition of Optomai, the Company.
	In July 2011, GigOptix sought a temporary restraining order and thereafter an injunction on the same grounds, both of which were denied by the court. In August 2011, GigOptix amended its Complaint for the second time to delete its causes of action for negligent and intentional interference with economic advantage and unfair competition, leaving the following causes of action to be adjudicated: (i) breach of duty of loyalty against the Ex-Employees only, (ii) breach of contract against the Ex-Employees only, (iii) misappropriation of trade secrets against all defendants, and (iv) unfair business practices against all defendants. Each side has served and responded to written discovery requests, produced documents and conducted witness depositions.
	On July 30, 2012, GigOptix filed and served a renewed motion for preliminary injunction, which was argued before the court on September 13, 2012. After considering evidence presented by the parties, including witness and expert testimony and forensic evidence, the court denied GigOptix’s renewed motion for preliminary injunction on September 18, 2012. The parties participated in a non-binding mediation of their dispute on December 20, 2012, but did not resolve the issues. In January 2013, the plaintiff’s claims were voluntarily dismissed as to two of the five individual Ex-Employee defendants and the court set a date for a trial beginning August 26, 2013, which was subsequently re-set by the court for September 23, 2013. On July 26, 2013, the court heard motions brought by all defendants to stay the case on the basis that certain individual defendants are being investigated by the United States Attorneys’ Office for the Northern District of California, and consequently may be unavailable to testify and rebut allegations made in the civil complaint. On July 30, 2013, the court denied the defendants’ stay motions.
	On August 22, 2013, the Company filed a complaint against GigOptix in the U.S. District Court for the Northern District of California alleging infringement of U.S. Patent Nos. 6,348,992 and 6,361,717. The complaint sought damages, attorneys’ fees and costs, and injunctive relief against GigOptix’s continued infringement of the patents, and also includes an allegation that GigOptix’s infringement has been willful. On September 13, 2013, GigOptix answered the complaint and denied infringement of both patents. GigOptix asserted several affirmative defenses, including some based on alleged conduct by the previous owner of the patents. GigOptix also asserted counterclaims for a declaratory judgment of non-infringement and invalidity of the patents.
	In September 2013, as a result of a mediation, the parties to each of the above suits entered into a global confidential settlement of all pending lawsuits between them, pursuant to which the parties filed joint requests with the relevant courts to fully and finally dismiss both cases, with prejudice, neither party admitted liability to the other, and the Company made a one-time settlement payment of $7.25 million to GigOptix.
	CSR Matter. In January 2013, CSR Technology Inc. (“CSR”) filed a complaint against the Company in the Massachusetts Superior Court for Suffolk County alleging breach of contract, breach of the implied covenant of good faith and fair dealing, misrepresentation, deceptive business practices and unfair competition, all relating to the Company’s purported failure to honor an alleged minimum purchase commitment contract between the Company with respect to certain semiconductor chips previously supplied by CSR for use in our automotive module product. The complaint claims alleged damages of $2.2 million and asks for attorney’s fees and other remedies. The Company filed an answer to the complaint on January 28, 2013. The parties are proceeding with discovery and document production. The Company intends to continue to defend the lawsuit vigorously. The Company does not expect that the ultimate cost to resolve these matters will have a material effect on the consolidated financial statements. The Company does not believe a risk of loss resulting from litigation is probable, nor is the Company able to estimate any reasonably possible range of loss.

Restructurings

Restructurings	12 Months Ended
	Sep. 27, 2013
Restructuring And Related Activities [Abstract]	'
Restructurings	'
	12. RESTRUCTURINGS
	The Company has periodically implemented restructuring actions in connection broader plans to reduce staffing, reduce the its internal manufacturing footprint and, generally, reduce operating costs. The restructuring expenses relate to direct and incremental costs related to 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):
	Balance of accrued costs — October 2, 2010	$	765
	Current period charges		1,499
	Payments		(1,742	)
	Balance of accrued costs — September 30, 2011		522
	Current period charges		1,862
	Payments		(2,056	)
	Balance of accrued costs — September 28, 2012		328
	Current period charges		950
	Payments		(1,133	)
	Balance of accrued costs — September 27, 2013	$	145
	The accrued balance of restructuring costs as of September 27, 2013 is expected to be paid through the first quarter of fiscal year 2014.

Product_Warranties

Product Warranties	12 Months Ended
	Sep. 27, 2013
Guarantees [Abstract]	'
Product Warranties	'
	13. PRODUCT WARRANTIES
	The Company establishes a product warranty liability at the time of revenue recognition. Product warranties generally have terms of between 12 months and 36 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. For sales to automotive customers, our warranty generally begins when the automobiles are sold to consumers and generally coincides with the automobile manufacturer’s warranty, which is typically 3 years or less based upon mileage limitations. 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
		2013			2012			2011
	Balance — beginning of year	$	866		$	1,885		$	2,140
	Impact of divestitures		—			—			(17	)
	Provisions		1,083			399			474
	Direct charges		(1,427	)		(1,418	)		(712	)
	Balance — end of year	$	522		$	866		$	1,885

Intangible_Assets

Intangible Assets	12 Months Ended
	Sep. 27, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Intangible Assets	'
	14. INTANGIBLE ASSETS
	The Company performed its annual impairment test for the trade name and goodwill in the fourth quarter of each fiscal year presented, concluding no impairment existed. The carrying amount of the trade name is $3.4 million as of September 27, 2013 and September 28, 2012. In connection with the acquisition of Optomai (see Note 3) in fiscal year 2011, the Company recorded goodwill of $4.0 million, which was unchanged as of September 27, 2013.
	Amortized intangible assets consist of the following (in thousands):
		Total			Acquired			Customer
					Technology			Relationships
	As of September 27, 2013:
	Intangible assets	$	28,437		$	16,037		$	12,400
	Less accumulated amortization		(13,938	)		(8,258	)		(5,680	)
	Intangible assets, net	$	14,499		$	7,779		$	6,720
	As of September 28, 2012:
	Intangible assets	$	26,154		$	13,754		$	12,400
	Less accumulated amortization		(10,778	)		(6,358	)		(4,420	)
	Intangible assets, net	$	15,376		$	7,396		$	7,980
	Amortization expense related to amortized intangible assets is as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Cost of revenue	$	1,900		$	1,988		$	1,588
	Selling, general and administrative		1,260			1,317			1,069
	Total	$	3,160		$	3,305		$	2,657
	Estimated amortization of the intangible assets in future fiscal years as of September 27, 2013 (in thousands):
	2014	$	3,215
	2015		3,215
	2016		2,450
	2017		1,686
	2018		1,437
	Thereafter		2,496
	Total	$	14,499
	In July 2013, the Company entered into a long term technology licensing and transfer agreement that calls for potential payments by the Company of up to $9.0 million through July 2016 based upon the achievement of specified milestones. Costs incurred in connection with the licensing and the transfer of the technology are capitalized as incurred as acquired technology and will be amortized to costs of sales upon completion of the transfer, which is currently expected to be completed through fiscal year 2016.

Income_Taxes

Income Taxes	12 Months Ended
	Sep. 27, 2013
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 the Company’s deferred tax assets and liabilities are as follows (in thousands):
		September 27,			September 28,
		2013			2012
	Current deferred tax assets:
	Accrued liabilities	$	4,361		$	2,546
	Inventory		3,466			3,376
	Deferred revenue		2,251			1,835
	Contingent consideration		—			261
	Accounts receivable		59			246
	Federal net operating loss		267			—
	Current net deferred tax assets	$	10,404		$	8,264
	Non-current deferred tax assets (liabilities):
	Federal and foreign net operating losses and credits	$	4,718		$	4,782
	Intangible assets		(2,554	)		(5,655	)
	Property and equipment		(2,889	)		(2,457	)
	Valuation allowance		(857	)		(761	)
	Non-current net deferred tax assets (liabilities)	$	(1,582	)	$	(4,091	)
	Total deferred tax asset	$	8,822		$	4,173
	As of September 27, 2013, the Company had $9.9 million of federal net operating loss carryforward expiring at various dates between fiscal years 2019 and 2026. The use of the federal operating loss carryforward is subject to limitations and such limitations may result in the operating loss carryforward periods expiring prior to full use of such losses.
	The domestic and foreign income (loss) from continuing operations before taxes were as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	United States	$	22,167		$	10,091		$	(16,163	)
	Foreign		14,279			4,846			15,712
	Income (loss) from operations before income taxes	$	36,446		$	14,937		$	(451	)
	The components of the provision for income taxes are as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Current:
	Federal	$	11,287		$	10,487		$	8,587
	State		1,512			2,141			1,044
	Foreign		985			1,340			1,047
	Current provision		13,784			13,968			10,678
	Deferred:
	Federal		(3,326	)		2,569			6,006
	State		(1,146	)		258			368
	Foreign		(273	)		(1,387	)		943
	Change in valuation allowance		96			545			(16,676	)
	Deferred provision (benefit)		(4,649	)		1,985			(9,359	)
	Total provision	$	9,135		$	15,953		$	1,319
	The Company’s net deferred tax asset relates predominantly to its operations in the United States. A valuation allowance is recorded when, based on assessment by 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.
	During fiscal year 2011, the Company reduced the valuation allowance by $16.7 million, after concluding it was more likely than not that the deferred tax assets would be realized. The Company concluded the realization of the assets was more likely than not after recording consolidated book income before nondeductible expenses related to fair value measurements for two years coupled with expectations of future taxable income thereafter that will be sufficient to allow the realization of the deferred tax assets. The $857,000 and $761,000 of valuation allowance remaining as of September 27, 2013 and September 28, 2012, respectively, relates to a foreign jurisdiction for which the Company does not believe recovery of the deferred tax asset is more likely than not.
	The Company’s effective tax rates differ from the federal and statutory rate as follows:
		Fiscal Years
		2013			2012			2011
	Federal statutory rate		35	%		35	%		(35.0	)%
	Foreign rate differential		(9.5	)		(28.4	)		157.9
	State taxes net of federal benefit		2.1			10.1			203.6
	Change in tax status		—			(9.3	)		—
	Class B Conversion and warrant liabilities		4.1			95.9			3,478.00
	Change in valuation allowance		0.3			3.7			(3,742.6	)
	Research and development credits		(8.0	)		(3.7	)		(277.6	)
	Provision to return adjustments		—			—			325.4
	Nondeductible compensation expense		0.6			1.7			138.2
	Other permanent differences		0.5			1.8			44.6
	Effective income tax rate		25.1	%		106.8	%		292.5	%
	The effective income tax rates for fiscal years 2013, 2012 and 2011 were significantly impacted by the changes in fair values of the warrant liability, which is neither taxable nor deductible for income tax purposes. The effective income tax rates for fiscal years 2012 and 2011 were significantly impacted by the changes in fair values of the Class B conversion liability, which is neither taxable nor deductible for tax purposes. In addition, the Company recognized benefits from (i) the retroactive reinstatement of the U.S. research and development tax credits in fiscal year 2013, (ii) a change in tax status of a subsidiary in fiscal year 2011, and (iii) a reduction in the valuation allowance as described above. The U.S. research and development tax credit, which had previously expired on December 31, 2011, was reinstated as part of The American Taxpayer Relief Act of 2012 enacted on January 2, 2013.
	With the exception of the earnings for a Taiwanese subsidiary in fiscal year 2011, all earnings of foreign subsidiaries are considered indefinitely reinvested for the periods presented. In fiscal year 2011, the Company could not conclude that the earnings of a Taiwanese subsidiary could be considered indefinitely invested and, accordingly, provided for the earnings in its tax provision, which increased the tax provision by $842,000 in that fiscal year. This provision was reversed in fiscal year 2012 after the Company completed a reorganization of its foreign subsidiaries. Undistributed earnings of all foreign subsidiaries as of September 27, 2013 aggregated $37.2 million. 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):
	Balance — October 2, 2010 and September 30, 2011	$	437
	Additions based on current year tax positions		597
	Reductions based on prior year tax positions		(437	)
Balance — September 28, 2012		597
Reductions based on prior year tax positions		(597	)
Balance — September 27, 2013	$	—
A summary of the fiscal tax years that remain subject to examination, as of September 27, 2013, for the Company’s significant tax jurisdictions are:
Jurisdiction	Tax Years
	Subject to Examination
United States — federal		2000 — forward
United States — various states		2009 — forward
Ireland		2009 — forward
Generally, the Company is no longer subject to federal income tax examinations for years before 2010, except to the extent of loss and tax credit carryforwards from those years.

ShareBased_Compensation_Plans

Share-Based Compensation Plans	12 Months Ended
	Sep. 27, 2013
Disclosure Of Compensation Related Costs Sharebased 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 the Company’s consolidated statements of operations during the periods presented (in thousands):
		Fiscal Years
		2013			2012		2011
	Cost of revenue	$	1,068		$	704	$	308
	Research and development		1,739			967		219
	Selling, general and administrative		3,649			1,989		753
	Total	$	6,456		$	3,660	$	1,280
	The Company has 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, the Company has the ability to issue incentive stock options (ISOs), nonstatutory stock options (NSOs), stock appreciation rights, restricted stock, restricted stock units (RSUs), performance units, 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 generally vest over a four-year period with 25% vesting at the end of one year and the remaining vest monthly thereafter. Options granted generally are exercisable up to 10 years. In fiscal year 2012, the Company began granting RSUs, which generally vest annually over one, four or five years. As of September 27, 2013, the Company had 10.8 million shares available for future grants under the 2012 Plan.
	A summary of stock option activity for fiscal year 2013 is as follows (in thousands, except per share amounts):
		Number of Shares			Weighted-Average		Weighted-Average		Aggregate
					Exercise Price per		Remaining		Intrinsic Value
					Share		Contractual Term
							(in Years)
	Options outstanding — September 28, 2012		1,861		$	1.23		7.1	$	21,352
	Exercised		(614	)
	Canceled or expired		(406	)
	Options outstanding — September 27, 2013		841		$	1.6		6.2	$	13,131
	Options vested and expected to vest — September 27, 2013		816		$	1.6		6.2	$	12,737
	Options exercisable — September 27, 2013		646		$	1.52		6.1	$	10,140
	A summary of stock options outstanding as of September 27, 2013 is as follows (in thousands, except per share amounts):
	Exercise Prices	Number of Shares			Weighted		Number of
		Outstanding			Average		Shares
					Contractual		Exercisable
					Term
	$  0.64		354			5.8		307
	2.00		471			6.4		327
	11.08		16			7.7		12
			841			6.2		646
	Aggregate intrinsic value represents the difference between the Company’s closing stock price on September 27, 2013 and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $8.4 million for fiscal year 2013. As of September 27, 2013, total unrecognized compensation cost, adjusted for estimated forfeitures, related to nonvested stock options was $175,000, which is expected to be recognized over the next 0.9 years.
	No options were granted in fiscal years 2013 and 2012. The weighted-average assumptions used for calculating the fair value of stock options granted during fiscal year 2011 is as follows:
	Risk-free interest rate		1.9	%
	Expected term (years)		5.8
	Expected volatility		52.7	%
	Expected dividends		—	%
	A summary of restricted stock awards and units activity for fiscal year 2013 is as follows (in thousands):
		Number of			Weighted-Average		Aggregate
		Shares			Remaining		Intrinsic Value
					Contractual Term
					in Years
	Issued and unvested — September 28, 2012		582			2.9	$	7,391
	Granted		863
	Released		(248	)
	Canceled or expired		(68	)
	Issued and unvested shares — September 27, 2013		1,129			2.9	$	18,148
	Shares expected to vest		1,018			2.9	$	16,362
	As of September 27, 2013, total unrecognized compensation cost, adjusted for estimated forfeitures, related to RSUs and restricted stock was approximately $12.5 million, which is expected to be recognized over the next 2.9 years.
	Concurrently with the IPO in March 2012, the ESPP became effective. The ESPP allows eligible employees to purchase shares of the Company’s 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. The board of directors has provided for an initial offering period of eight months following the IPO, followed by six-month offering periods thereafter. As of September 27, 2013, total unrecognized compensation cost related to the ESPP was approximately $0.1 million, which is expected to be recognized through the first quarter of fiscal year 2014. In fiscal years 2013 and 2012, 131,000 and zero, respectively, of shares of common stock were issued under the ESPP.
	The financial impact of any modifications to share-based awards during the periods presented was immaterial.
	For the purpose of determining the exercise prices of the Company’s share-based awards prior to the IPO, fair value of the Company’s common stock was contemporaneously estimated by its board of directors as of each grant date, with input from management. Since the IPO, the Company’s quoted market price represents the fair value of the common stock.
	Certain of the share-based awards granted and outstanding as of September 27, 2013 are subject to accelerated vesting upon a sale of the Company or similar changes in control.
	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 2013, 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.

Preferred_Stock

Preferred Stock	12 Months Ended
	Sep. 27, 2013
Equity [Abstract]	'
Preferred Stock	'
	17. PREFERRED STOCK
	Upon completion of the IPO in March 2012, all outstanding shares of preferred stock were converted to common stock. Since that date, common stock is the only outstanding capital stock.
	In December 2010, the Company authorized 34,169,560 shares and issued 34,169,559.75 shares of Class B preferred stock (Class B) to new investors for $120.0 million in gross proceeds and net proceeds of $118.7 million. In connection with the Class B issuance, the Company also issued warrants to the new investors 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 within 10 days following consummation of a sale of all or substantially all assets or capital stock or other equity securities of the Company, including by merger consolidation, recapitalization, or similar transactions, if not otherwise exercised.
	Prior to cancellation in connection with the IPO, the Class A preferred stock (Class A) and Class B preferred stock had preferential voting, dividend, redemption and other rights superior to common stock. Each share of Class A and Class B automatically converted into .25 shares of common stock on the completion of the IPO.
	Qualified Public Offering or QPO Preference—The Class B stockholders were eligible to receive a preference payment based upon a formula that resulted in $60.0 million being paid to the Class B stockholders upon the close of the IPO on March 20, 2012.
	The Class B was recorded outside of permanent stockholders’ equity as mezzanine equity due to the existence of the optional redemption rights. As a result of the amendments to the preference rights of Class A described above, the Company reclassified the Class A from stockholders’ equity to mezzanine equity in December 2010. The reclassification was made at the issuance date fair value, which aggregated $106.4 million.
	The Company initially recorded the carrying value of the Class B as the total gross proceeds from the issuance less issuance costs, the fair value of the warrants (see Note 18) and the fair value of the Class B Conversion Liability discussed further below. The Company accreted the carrying value of the redeemable securities, including the Class B, to their redemption values using the effective interest method over the period from issuance to earliest redemption date. The accretion was recorded as an increase in the carrying value of the redeemable securities and a reduction to additional paid in capital, or in the absence of such, as an increase in the accumulated deficit.
	A summary of the allocation of proceeds to and changes in the carrying value of the Class B follows (in thousands):
		Shares			Amount
	Balance — October 2, 2010				$	—
	Issuance of Class B redeemable
	Issuance of Class B redeemable convertible preferred stock		34,170			120,000
	Less:
	Issuance costs					(1,321	)
	Fair value of common stock warrant					(5,656	)
	Fair value of Class B conversion liability					(41,641	)
	Initial recorded value					71,382
	Accretion					4,236
	Balance — September 30, 2011					75,618
	Accretion					2,616
	Reclassification upon conversion of Class B to common stock					(78,234	)
	Balance — September 28, 2012				$	—
	Class B Conversion Liability—The Class B redemption right allowed the holders to elect to receive a greater redemption amount related to the fair value of the Company’s common stock. This feature and the QPO Preference are embedded derivatives not deemed clearly and closely related to the host contract, Class B, due to, among other things, the potential cash settlement of both features. The embedded derivatives have been aggregated for financial reporting purposes. Accordingly, the embedded derivatives require separate accounting from the Class B. Upon issuance of the Class B, the estimated fair values of these embedded derivatives were bifurcated from the remainder of the Class B proceeds and recorded as long-term liabilities in the accompanying consolidated financial statements. Prior to March 2012, the carrying values of the embedded derivatives were adjusted to fair value at the end of each reporting period and the changes in fair value recognized in the statements of operations. The Class B conversion liabilities were settled upon the closing of the Company’s IPO in March 2012. The following is a summary of the changes in the carrying value of the Class B conversion liability (in thousands):
	Balance — October 2, 2010	$	—
	Estimated fair value upon issuance		41,641
	Change in estimated fair value		39,737
	Balance — September 30, 2011		81,378
	Change in estimated fair value		44,119
	Payment of Class B preference		(60,000	)
	Reclassification upon conversion of Class B to common stock		(65,497	)
	Balance — September 28, 2012	$	—

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Sep. 27, 2013
Equity [Abstract]	'
Stockholders' Equity	'
	18. STOCKHOLDERS’ EQUITY
	Special Dividend—On January 4, 2011, in connection with the Class B issuance, the Company declared and paid a special dividend of $80 million to Class A and common stockholders of record on that date, including $863,000 held in escrow pursuant to a merger in fiscal 2010. Dividends of $0.63 per share, $0.81 per share and $2.44 per share were payable to the record holders as of January 4, 2011 of the Company’s Series A-1, Series A-2 and common stock, respectively, aggregating $80.0 million. Pursuant to the terms of an escrow agreement, $228,000 was reclaimed by the Company upon resolution of an indemnification claim against the escrow and the reclaim of certain shares of Series A-2 in fiscal year 2012.
	Common Stock Warrants—In connection with the Class B issuance, the Company 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 of the Company, 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. Following completion of the IPO in March 2012, and pursuant to an investor rights agreement between the Company and the holders of the warrants, the holders of the warrants have the right in certain circumstances to require the Company to register the warrants or the underlying shares of common stock for resale under the Securities Act. The Company does not have a sufficient number of shares currently registered and available to satisfy the request for registration, if such is made. As of September 27, 2013, 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.
	The inclusion of antidilution rights and the subsequent registration rights result in the warrants being recorded outside stockholders’ equity (deficit) and as a liability in accordance with authoritative accounting literature. The Company is 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 30, 2011	$	10,736
	Change in estimated fair value		(3,175	)
	Balance — September 28, 2012		7,561
	Change in estimated fair value		4,312
	Balance — September 27, 2013	$	11,873
	On March 8, 2012, the Company’s board of directors and stockholders approved a one-for-four reverse stock split of its common stock, which took effect on March 9, 2012. All share and per share amounts relating to the Company’s common stock in these consolidated financial statements give effect to the reverse stock split for all periods presented.

RelatedParty_Transactions

Related-Party Transactions	12 Months Ended
	Sep. 27, 2013
Related Party Transactions [Abstract]	'
Related-Party Transactions	'
	19. RELATED-PARTY TRANSACTIONS
	GaAs Labs, LLC (GaAs Labs), a stockholder and an affiliate of directors and majority stockholders John and Susan Ocampo, was formerly engaged to provide management services pursuant to an agreement entered into in fiscal year 2008 and amended in December 2010. Selling, general and administrative expenses for fiscal years 2012 and 2011 include $360,000, and 720,000, respectively, for such services. The agreement terminated by its terms concurrently with the closing of the IPO in March 2012.
	In April 2012, the Company entered into an agreement with GaAs Labs whereby GaAs Labs pays the Company for administrative and business development services provided 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. For fiscal years 2013 and 2012, the Company billed GaAs Labs $372,000 and $185,000, respectively, for services provided pursuant to this agreement and has recorded these amounts as other income in the accompanying consolidated statements of operations.
	In February 2012, the Company entered into a design services agreement with Ubiquiti Networks, Inc. (Ubiquiti). Two of the Company’s directors were also directors of Ubiquiti at such time. An affiliate of one of the directors is also an Ubiquiti stockholder. The agreement provides that the Company will provide engineering
	services to Ubiquiti toward the development of an IC device. The agreement also provides that Ubiquiti will pay the Company up to $500,000 for such services based on milestone achievement and sets a unit price for any future production orders of such devices. Pursuant to the terms of the agreement, the Company recorded related revenue of $300,000 and $200,000, respectively, in fiscal years 2013 and 2012, respectively.
	In fiscal year 2013, the Company purchased $65,000 of material from a GaAs Labs subsidiary and recorded revenue of $242,000 from sales of product to a privately-held company with a common director.

Divestitures

Divestitures	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Divestitures	'
	20. DIVESTITURES
	In fiscal year 2011, the Company sold non-core assets representing two businesses to two separate acquirers, receiving cash proceeds aggregating $3.0 million. The Company has no continuing interests in either business. One sale resulted in a loss of $1.3 million and the other sale resulted in a gain of $1.6 million. The net gain arising from the divestitures is included in income from discontinued operations in the accompanying consolidated statement of operations for fiscal year 2011. The following is a summary of operating results in fiscal year 2011 related to the divested businesses (in thousands):
	Revenue	$	5,808
	Income from discontinued operations before income taxes	$	67
	Gain on sale of assets, net		329
	Income tax benefit		358
	Income from discontinued operations, net	$	754

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Sep. 27, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	21. 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
		2013		2012			2011
	Numerator:
	Net income (loss) available to controlling interest	$	27,311	$	(1,016	)	$	(1,016	)
	Accretion to redemption value of redeemable convertible preferred stock		—		(2,616	)		(4,236	)
	Dividends declared and paid or payable to preferred stockholders		—		—			(76,216	)
	Net income (loss) attributable to common stockholders	$	27,311	$	(3,632	)	$	(81,468	)
	Dividends declared and paid to common stockholders	$	—	$	—		$	3,784
	Denominator:
	Weighted average common shares outstanding-basic		45,916		24,758			1,505
	Dilutive effect of options and warrants		1,221		—			—
	Weighted average common shares outstanding-diluted		47,137		24,758			1,505
	Common stock earnings per share-basic:
	Distributed	$	—	$	—		$	2.51
	Undistributed		0.59		(0.15	)		(54.13	)
	Net common stock earnings per share	$	0.59	$	(0.15	)	$	(51.62	)
	Common stock earnings per share-diluted:
	Distributed	$	—	$	—		$	2.51
	Undistributed		0.58		(0.15	)		(54.13	)
	Net common stock earnings per share	$	0.58	$	(0.15	)	$	(51.62	)
	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
		2013		2012			2011
	Stock options and restricted stock		—		1,821			3,042
	Convertible preferred stock		—		17,733			—
	Warrants		—		141			—
	Total common stock equivalent shares excluded		—		19,695			3,042
	The table above excludes 1.3 million shares of common stock for fiscal year 2011 issuable upon exercise of out-of-the money common stock warrants.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Sep. 27, 2013
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flow Information	'
	22. SUPPLEMENTAL CASH FLOW INFORMATION
	The following is supplemental cash flow information regarding noncash investing and financing activities:
		•	As of September 27, 2013 and September 28, 2012 the Company had $2.4 million and $1.1 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.
		•	In March 2012, upon completion of the IPO, all shares of convertible preferred stock converted into common stock. As a result, the carrying values immediately prior to the conversion of Series A-1 convertible preferred stock ($64.0 million), Series A-2 convertible preferred stock ($42.4 million), and Class B ($78.2 million) were reclassified to stockholders’ equity, primarily as in additional paid-in capital. In addition, the carrying value of the Class B conversion liability immediately prior to conversion of the Class B ($125.5 million) was reclassified to additional paid-in capital.
		•	In fiscal year 2011, pursuant to the terms of an escrow agreement from a merger in fiscal 2010, the Company withheld the payment of $863,000 in dividends, which were either paid or forfeited in fiscal year 2012 pursuant to the terms of the arrangement.

Geographic_and_Significant_Cus

Geographic and Significant Customer Information	12 Months Ended
	Sep. 27, 2013
Segment Reporting [Abstract]	'
Geographic and Significant Customer Information	'
	23. GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION
	The Company has 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 the Company’s operations in different geographic regions, based upon customer locations, is presented below (in thousands):
			Fiscal Years
	Revenue by Geographic Region		2013			2012			2011
	United States		$	186,025		$	159,479		$	166,176
	International (1)			132,693			142,724			144,119
	Total		$	318,718		$	302,203		$	310,295
			As Of
	Long-Lived Assets by Geographic Region		September 27,			September 28,
			2013			2012
	United States		$	25,054		$	23,027
	International (2)			6,509			7,182
	Total		$	31,563		$	30,209
	-1	No international countries represented greater than 10% of total revenue during the periods presented.
	-2	No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia-Pacific region, which accounted for 12%.
	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		2013			2012			2011
	Customer A			16	%		18	%		21	%
	Customer B			25	%		16	%		12	%
	Accounts Receivable		September 27,			September 28,
			2013			2012
	Customer A			18	%		16	%
	Customer B			21	%		18	%
	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 2013, 2012 and 2011, ten customers represented an aggregate of 59%, 55% and 61% of total revenue, respectively.

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Sep. 27, 2013
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 2013
	Revenue		$	75,014	$	77,824		$	82,225	$	83,655	$	318,718
	Gross profit			32,265		33,861			36,293		37,280		139,699
	Net income (1)			6,108		8,086			9,367		3,750		27,311
	Per share data (2)
	Net income, basic		$	0.13	$	0.18		$	0.2	$	0.08	$	0.59
	Net income, diluted		$	0.13	$	0.17		$	0.2	$	0.08	$	0.58
	Fiscal Year 2012
	Revenue		$	73,035	$	77,480		$	77,125	$	74,563	$	302,203
	Gross profit			31,415		36,549			35,404		31,534		134,902
	Net income (loss)			22,042		(53,561	)		13,545		16,958		(1,016	)
	Per share data (2)
	Net income (loss), basic		$	0.43	$	(8.02	)	$	0.3	$	0.37	$	(0.15	)
	Net income (loss), diluted		$	0.2	$	(8.02	)	$	0.29	$	0.36	$	(0.15	)
	-1	The fourth quarter of fiscal year 2013 includes a litigation settlement of $7.3 million.
	-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 do not necessarily equal the full year earnings per share.

Subsequent_Events

Subsequent Events	12 Months Ended
	Sep. 27, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	25. SUBSEQUENT EVENTS
	On November 5, 2013, the Company entered into an Agreement and Plan of Merger (the Merger Agreement) with Micro Merger Sub, Inc., a Delaware corporation and wholly-owned subsidiary of the Company (Purchaser), and Mindspeed Technologies, Inc., a Delaware corporation (Mindspeed), pursuant to which the Company will acquire Mindspeed (the Mindspeed Acquisition). Mindspeed is a supplier of semiconductor solutions for communications infrastructure applications.
	Pursuant to the terms and subject to the conditions set forth in the Merger Agreement on November 19, 2013, the Company and Purchaser commenced a cash tender offer (the Offer) to purchase all of the issued and outstanding shares of common stock, par value $0.01, of Mindspeed (the Shares) at a purchase price of $5.05 per share, net to the seller in cash, without interest, less any applicable withholding taxes. The Offer will expire at 12:00 midnight on December 17, 2013, unless it is extended. Upon completion of the Offer and subject to the terms and conditions of the Merger Agreement and Section 251(h) of the Delaware General Corporation Law, Purchaser will merge with and into Mindspeed (the Merger), with Mindspeed surviving as a wholly-owned subsidiary of the Company. The Company expects to fund the acquisition through the use of available cash and borrowings under its revolving credit facility. The purchase price is expected to be $272 million, excluding certain assumed liabilities and costs related to the acquisition.
	The Offer and the Merger are subject to the satisfaction of certain closing conditions, including, among others, that (a) there is validly tendered (and not validly withdrawn) the number of Shares which, when added to any Shares owned by the Company or any of its subsidiaries, would represent at least a majority of the outstanding Shares of Mindspeed, (b) the waiting periods applicable to the Offer under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and similar foreign merger control laws have expired or terminated, and (c) other customary conditions as set forth in Annex A to the Merger Agreement have been satisfied or waived.
	The Merger Agreement contains customary representations and warranties and covenants for a transaction of this nature, including covenants regarding the operation of the business of Mindspeed prior to the closing of the Merger. The Merger Agreement also contains certain termination rights for each of the Company and Mindspeed subject to the conditions set forth in the Merger Agreement, and in certain circumstances, Mindspeed may be required to pay the Company a termination fee of $9.5 million. In addition, a MACOM board member is employed by the financial adviser representing Mindspeed.
	One of the Company’s directors is a Managing Director of Morgan Stanley & Co., LLC (Morgan Stanley). Morgan Stanley served as a financial advisor to Mindspeed and provided a fairness opinion to Mindspeed’s Board of Directors in connection with the Mindspeed Acquisition. At the commencement of the Company’s interest in the Mindspeed Acquisition, Morgan Stanley informed the Company, and asked the Company to so inform its Board of Directors, that such director was a member of the Morgan Stanley team that would be providing financial advisory services to Mindspeed in connection with the Mindspeed Acquisition. As a result, such director was screened from all of the Company’s processes and confidential information sent to the Company’s Board of Directors regarding this transaction, and such director was recused and excluded from any discussions regarding, and from approval of, the Mindspeed Acquisition by the Company’s Board of Directors. The Company understands that Morgan Stanley will be paid a fee by Mindspeed of approximately $5.4 million for its services, $100,000 of which was paid as a retainer fee, $500,000 of which has been earned but not yet paid upon the rendering of the opinion to Mindspeed and the remainder of which (approximately $4.8 million) is contingent upon the closing of the Merger.
	On November 5, 2013, the Company entered into Amendment No. 1 to Amended and Restated Credit Agreement (the “Amendment”) with the lenders party thereto and JPMorgan Chase Bank, N.A, as Administrative Agent for the lenders, pursuant to which the Company’s revolving credit facility was amended to allow for certain indebtedness of Mindspeed to remain outstanding after the consummation of the Merger.
	Between November 7, 2013 and November 20, 2013, eleven purported class action lawsuits were filed on behalf of Mindspeed stockholders against various defendants including Mindspeed, its directors, the Company, the Company’s wholly-owned subsidiary, Micro Merger Sub, Inc., and unnamed “John Doe” defendants in connection with the proposed Merger. Those cases are captioned Marchese v. Mindspeed Technologies, Inc., et al., Case No. 30-2013-00686181-CU-BT-CXC (Cal. Super. Ct., Orange Cnty., Nov. 7, 2013); Iacobellis V. Decker, et al., Case No. 30-2013-00686796-CU-SL-CXC (Cal. Super. Ct., Orange Cnty., Nov. 7 2013); Pogal v. Mindspeed Technologies, Inc., et al., Case No. 9076-VCN (Del. Ch. Ct. Nov. 12, 2013); Hoffman v. Mindspeed Technologies, Inc., et al., Case No. 30-2013-00687029-CU-SL-CXC (Cal. Super. Ct., Orange Cnty., Nov. 12, 2013); Swain v. Mindspeed Technologies, Inc., et al., Case No. 30-2013-00687498-CU-SL-CXC (Cal. Super. Ct., Orange Cnty., Nov. 12, 2013); Miller v. Mindspeed Technologies, Inc., et al., Case No. 30-2013-00687951-CU-BT-CXC (Cal. Super. Ct., Orange Cnty., Nov. 13, 2013); Durand v. Decker, et al., Case No. 9080 (Del. Ch. Ct. Nov. 14, 2013); Tassa v. Mindspeed Technologies, Inc., et al., Case No. 9096 (Del. Ch. Ct. Nov. 15, 2013); Feuerstein v. Mindspeed Technologies, Inc., et al., Case No. 9101 (Del. Ch. Ct. Nov. 18, 2013); Hoffman v. Mindspeed Technologies, Inc., et al., Case No. 9105 (Del. Ch. Ct. Nov. 19, 2013); and Vinciguerra v. Mindspeed Technologies, Inc., et al., Case No. 9107 (Del. Ch. Ct. Nov. 20, 2013). The complaints allege, generally, that the Mindspeed director defendants breached their fiduciary duties to Mindspeed stockholders, and that the other defendants aided and abetted such breaches, by seeking to sell Mindspeed through an allegedly defective process, for an unfair price, and on unfair terms. The lawsuits seek, among other things, equitable relief that would enjoin the consummation of the proposed merger, rescission of the proposed merger (to the extent the proposed merger has already been consummated), damages, and attorneys’ fees and costs. The Company intends to defend the lawsuits vigorously. The Company does not expect that the ultimate cost to resolve these matters will have a material effect on the consolidated financial statements. The Company does not believe a risk of loss resulting from litigation is probable, nor is the Company able to estimate any reasonably possible range of loss.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 27, 2013
Accounting Policies [Abstract]	'
Principles of Consolidation	'
	Principles of Consolidation—The accompanying consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	'
	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, the Company bases 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	'
	Discontinued Operations—In the second and third quarters of fiscal year 2011, the Company sold assets of non-core laser diode and ferrite business lines and has segregated the operating results of the divested businesses from continuing operations in fiscal year 2011.
Foreign Currency Translation and Remeasurement	'
	Foreign Currency Translation and Remeasurement—The Company’s consolidated financial statements are presented in U.S. dollars. While the majority of the Company’s foreign operations use the U.S. dollar as the functional currency, the financial statements of the Company’s 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 the Company’s 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. Revenues 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 (losses) on foreign currency remeasurement are reflected in selling, general and administrative expense in the accompanying consolidated statements of operations. The Company’s recognized net gains and losses on foreign exchange are included in selling, general and administrative expense and for all periods presented were immaterial.
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.
Accounts Receivable	'
	Accounts Receivable—Accounts receivable are stated net of an allowance for estimated uncollectible accounts, which is determined by establishing reserves for specific accounts and considering historical and estimated probable losses.
Inventories	'
	Inventories—Inventories are stated at the lower of cost or market. The Company uses a combination of standard cost and moving weighted-average cost methodologies to determine the cost basis for its 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, the Company also evaluates 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—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
	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 Intangible Assets	'
	Goodwill and Intangible Assets—The Company has intangible assets with indefinite and definite lives. Goodwill and the “M/A-COM” trade name are indefinite-lived assets and were acquired through business combinations. 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. 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 intangible assets in any period presented through September 27, 2013. The Company’s other intangible assets, including acquired technology and customer relationships, are definite-lived assets and are subject to amortization. The Company amortizes definite-lived assets over their estimated useful lives, which range from 5 to 10 years, based on the pattern over which the Company expects to receive the economic benefit from these assets.
Impairment of Long-Lived Assets	'
	Impairment of Long-Lived Assets—Long-lived assets include property and equipment and definite-lived intangible assets subject to amortization, which includes technology and customer relationships. The Company evaluates 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 an asset for recoverability, the Company estimates the undiscounted cash flows expected to result from the Company’s 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 was no impairment of long-lived assets in any period presented.
Revenue Recognition	'
	Revenue Recognition—Revenue from the sale of products is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Provided other revenue recognition criteria are met, product revenue is recognized upon transfer of title and risk of loss, which is generally upon shipment. The Company has distribution agreements that provide distributors with rights to return certain products and price protection on certain products. The Company is unable to estimate the amount of its products that may be returned by such distributors, and the ultimate sales price of products sold to such distributors, until the distributors have sold the products to third-party customers, at which point both the return rights and the price protection feature lapse. Accordingly, the Company defers the recognition of revenue on shipments of returnable and price-protected products until the products are sold by the distributors to third-party customers. The Company defers both the revenue recognition and related cost of revenue on these products by recording the revenue as deferred revenue and the associated cost remains recorded in inventory in the accompanying consolidated balance sheets. When these products are sold to a distributor’s customers, the Company recognizes the revenue and associated cost of revenue. As of September 27, 2013 and September 28, 2012, $3.0 million and $3.1 million, respectively, of product costs pertaining to deferred revenue was included in inventories as finished goods in the accompanying consolidated balance sheets. Shipping and handling fees billed to customers are recorded as revenue while the related costs are classified as a component of costs of revenue. The Company provides warranties for its products and accrues the estimated costs of warranty claims in the period the related revenue is recorded.
Advertising Costs	'
	Advertising Costs—Advertising costs, which are not material, are expensed as incurred.
Research and Development Costs	'
	Research and Development Costs—Costs incurred in the research and development of products are expensed as incurred.
Income Taxes	'
	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.
	The Company provides 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 taken by the Company in its tax filings or positions is more likely than not to be realized following an examination by taxing authorities. The Company recognizes 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.
Earnings Per Share	'
	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 convertible preferred stock, stock options, warrants and restricted stock units, using the treasury stock method.
Asset Retirement Obligations	'
	Asset Retirement Obligations—The Company recognizes the fair value of a liability for an asset retirement obligation in the period in which it is incurred when a reasonable estimate of fair value can be made. The fair value of the liability is added to the carrying amount of the associated asset and this additional carrying amount is amortized over the life of the asset.
	Changes in the fair value of a liability for an asset retirement obligation due to the passage of time are measured by applying an interest method of allocation. Under this method, changes in fair value due to the passage of time are recognized as an increase in the liability and as accretion expense in the same expense category for which the asset relates. Changes in fair value resulting from revisions to the timing or the amount of the original estimate of undiscounted cash flows are recognized as an increase or a decrease in the carrying amounts of the liability and associated asset.
Fair Value Measurements	'
	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, the Company groups 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 the Company to develop its own assumptions for model-based valuation techniques. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures certain financial assets and liabilities at 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	'
	Contingent Consideration—The Company estimates and records 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, the Company estimates the changes in the fair value of contingent consideration, and any change in fair value is recognized in the consolidated statements of operations. The Company estimates 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	'
	Share-Based Compensation—The Company accounts for all share-based compensation arrangements using the fair value method. The Company recognizes 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. The Company records the expense in the consolidated statements of operations in the same manner in which the award recipients’ costs are classified. The Company uses 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. The Company records expense related to awards issued to non-employees over the related service period and periodically revalues the awards as they vest. The Company derives 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. The Company based the assumed dividend yield on its expectation of not paying dividends in the foreseeable future. The Company calculated 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 the Company’s limited operating experience. In addition, due to the Company’s limited historical data, the Company incorporates 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.
Escrow Arrangements and Outstanding Shares	'
	Escrow Arrangements and Outstanding Shares—In fiscal year 2012, 282,681 shares of former Series A-2 convertible preferred stock were canceled in resolution of an indemnification claim against an escrow arrangement in connection with a prior acquisition and all remaining shares were released pursuant to the terms of the escrow. The escrow was terminated upon completion of the IPO in March 2012 and no further shares or amounts are held in escrow.
	Outstanding shares of common stock presented in the accompanying consolidated statements of stockholders’ equity as of September 27, 2013 and September 28, 2012 exclude 74,000 and 131,000 shares, respectively, issued as compensation to employees that were subject to forfeiture, pending continued employment with the Company through stated vesting dates.
Guarantees and Indemnification Obligations	'
	Guarantees and Indemnification Obligations—The Company enters into agreements in the ordinary course of business with, among others, customers, distributors, and original equipment manufacturers (OEM). Most of these agreements require the Company to indemnify the other party against third-party claims alleging that a Company product infringes a patent and/or copyright. Certain agreements in which the Company grants limited licenses to specific Company trademarks require the Company 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 the Company to indemnify the other party against certain claims relating to property damage, personal injury, or the acts or omissions of the Company, its employees, agents, or representatives. In addition, from time to time, the Company has made certain guarantees in the form of warranties regarding the performance of Company products to customers.
	The Company has agreements with certain vendors, creditors, lessors, and service providers pursuant to which the Company has agreed to indemnify the other party for specified matters, such as acts and omissions of the Company, its employees, agents, or representatives.
	The Company has procurement or license agreements with respect to technology that is used in its products and agreements in which the Company obtains rights to a product from an OEM. Under some of these agreements, the Company has agreed to indemnify the supplier for certain claims that may be brought against such party with respect to the Company’s acts or omissions relating to the supplied products or technologies.
	The Company’s certificate of incorporation and agreements with certain of its and its 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, the Company has maintained director and officer liability insurance coverage, including coverage for directors and officers of acquired companies.
	The Company has not experienced any losses related to these indemnification obligations in any period presented, and no claims with respect thereto were outstanding as of September 27, 2013. The Company does not expect significant claims related to these indemnification obligations and, consequently, has concluded that the fair value of these obligations is negligible. No liabilities related to indemnification liabilities have been established.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements—Under the Jumpstart Our Business Startups Act (JOBS Act), the Company meets the definition of an emerging growth company. The Company has elected to avail itself of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act.
Evaluation of Subsequent Events	'
	Evaluation of Subsequent Events—Management has evaluated subsequent events involving the Company 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 these Notes to Consolidated Financial Statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 27, 2013
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
	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

Mergers_and_Acquisitions_Table

Mergers and Acquisitions (Tables)	12 Months Ended
	Sep. 27, 2013
Business Combinations [Abstract]	'
Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed	'
	The aggregate purchase price for Optomai was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition as follows (in thousands):
	Assets acquired:
	Property and equipment	$	238
	Other assets		79
	Identifiable intangible assets		4,176
	Total assets acquired		4,493
	Liabilities assumed:
	Deferred tax liability	$	1,599
	Other liabilities		260
	Total liabilities assumed		1,859
	Net assets acquired	$	2,634
	Consideration:
	Cash paid at closing	$	1,807
	Contingent consideration		4,817
	Total consideration		6,624
	Net assets acquired		2,634
	Goodwill	$	3,990
Components of Acquired Intangible Assets	'
	The components of the acquired intangible assets were as follows (in thousands):
	Technology	$	2,565
	Customer relationships		1,611
		$	4,176
Schedule of Changes in Fair Value of Contingent Consideration Resulting from Acquisitions	'
	The changes in fair value of contingent consideration resulting from acquisitions are set below (in thousands):
	Balance — October 2, 2010	$	29,300
	Acquisition of Optomai		4,817
	Payment — MACOM business acquisition		(8,825	)
	Change in fair value		210
	Balance — September 30, 2011		25,502
	Payment — MACOM business acquisition		(15,000	)
	Change in fair value		(3,922	)
	Balance — September 28, 2012		6,580
	Payment — MACOM business acquisition		(6,003	)
	Change in fair value		(577	)
	Balance — September 27, 2013	$	—

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Sep. 27, 2013
Fair Value Disclosures [Abstract]	'
Financial Liabilities Measured at Fair Value on Recurring Basis	'
	Financial liabilities measured at fair value on a recurring basis consist of the following (in thousands):
		September 27, 2013
		Fair Value		Active Markets for			Observable Inputs		Unobservable
				Identical Assets			(Level 2)		Inputs (Level 3)
				(Level 1)
	Common stock warrant liability	$	11,873		—			—	$	11,873
		September 28, 2012
		Fair Value		Active Markets for			Observable Inputs		Unobservable
				Identical Assets			(Level 2)		Inputs (Level 3)
				(Level 1)
	Contingent consideration	$	6,580	$	—		$	—	$	6,580
	Common stock warrant liability	$	7,561	$	—		$	—	$	7,561
Changes in Financial Liabilities with Inputs Classified within Level 3 of Fair Value	'
	The changes in financial liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):
		Fiscal Year 2013
		September 28,		Net			Purchases		Sales and			Transfers in		September 27,
		2012		Realized/Unrealized			and		Settlements			and/or (out)		2013
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—
	Common stock warrant	$	7,561	$	4,312		$	—	$	—		$	—	$	11,873
		Fiscal Year 2012
		September 30,		Net			Purchases		Sales and			Transfers in		September 28,
		2011		Realized/Unrealized			and		Settlements			and/or (out)		2012
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	25,502	$	(3,922	)	$	—	$	(15,000	)	$	—	$	6,580
	Common stock warrant	$	10,736	$	(3,175	)	$	—	$	—		$	—	$	7,561
	Class B conversion liability	$	81,378	$	44,119		$	—	$	(125,497	)	$	—	$	—
		Fiscal Year 2011
		October 2,		Net			Purchases		Sales and			Transfers in		September 30,
		2010		Realized/Unrealized			and		Settlements			and/or (out)		2011
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	29,300	$	210		$	4,817	$	(8,825	)	$	—	$	25,502
	Common stock warrant	$	—	$	5,080		$	5,656	$	—		$	—	$	10,736
	Class B conversion liability	$	—	$	39,737		$	41,641	$	—		$	—	$	81,378

Allowance_for_Doubtful_Account1

Allowance for Doubtful Accounts (Tables)	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Schedule of Allowance for Doubtful Accounts Related to Accounts Receivable	'
	The activity in the allowance for doubtful accounts related to accounts receivable is as follows (in thousands):
		Fiscal Years
		2013			2012		2011
	Balance — beginning of year	$	699		$	657	$	891
	Provision (recoveries), net		(443	)		42		(116	)
	Charge-offs		(61	)		—		(118	)
	Balance — end of year	$	195		$	699	$	657

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Sep. 27, 2013
Inventory Disclosure [Abstract]	'
Components of Inventories	'
	Inventories consist of the following (in thousands):
		September 27,		September 28,
		2013		2012
	Raw materials	$	27,643	$	29,922
	Work-in-process		5,740		5,472
	Finished goods		20,612		22,065
	Total	$	53,995	$	57,459

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Sep. 27, 2013
Property Plant And Equipment [Abstract]	'
Components of Property and Equipment	'
	Property and equipment consists of the following (in thousands):
		September 27,			September 28,
		2013			2012
	Machinery and equipment	$	46,781		$	38,795
	Leasehold improvements		5,051			4,876
	Furniture and fixtures		720			699
	Construction in process		6,124			4,188
	Computer equipment and software		6,352			6,594
	Total property and equipment		65,028			55,152
	Less accumulated depreciation and amortization		(33,465	)		(24,943	)
	Property and equipment — net	$	31,563		$	30,209

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Schedule of Accrued Liabilities	'
	Accrued liabilities consist of the following (in thousands):
		September 27,		September 28,
		2013		2012
	Compensation and benefits	$	9,593	$	7,643
	Product warranty		522		866
	Professional fees		1,905		1,132
	Software licenses		1,385		616
	Asset retirement obligations — current portion		270		397
	Distribution costs		641		624
	Restructuring costs		145		328
	Other		1,703		2,261
	Total	$	16,164	$	13,867

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Sep. 27, 2013
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 September 27, 2013 are as follows (in thousands):
	2014	$	3,298
	2015		2,820
	2016		2,654
	2017		2,417
	2018		1,570
	Thereafter		5,612
	Total minimum lease payments	$	18,371
Schedule of Changes in Fair Value of Asset Retirement Obligations	'
	A summary of the changes in the estimated fair values of the asset retirement obligations is as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Balance — beginning of year	$	949		$	913		$	1,819
	Payments		(1,403	)		(41	)		(705	)
	Accretion expense and settlements		1,323			77			(201	)
	Balance — end of year	$	869		$	949		$	913

Restructurings_Tables

Restructurings (Tables)	12 Months Ended
	Sep. 27, 2013
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):
	Balance of accrued costs — October 2, 2010	$	765
	Current period charges		1,499
	Payments		(1,742	)
	Balance of accrued costs — September 30, 2011		522
	Current period charges		1,862
	Payments		(2,056	)
	Balance of accrued costs — September 28, 2012		328
	Current period charges		950
	Payments		(1,133	)
	Balance of accrued costs — September 27, 2013	$	145

Product_Warranties_Tables

Product Warranties (Tables)	12 Months Ended
	Sep. 27, 2013
Guarantees [Abstract]	'
Schedule of Product Warranty Liability Activity	'
	Product warranty liability activity is as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Balance — beginning of year	$	866		$	1,885		$	2,140
	Impact of divestitures		—			—			(17	)
	Provisions		1,083			399			474
	Direct charges		(1,427	)		(1,418	)		(712	)
	Balance — end of year	$	522		$	866		$	1,885

Intangible_Assets_Tables

Intangible Assets (Tables)	12 Months Ended
	Sep. 27, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Summary of Amortized Intangible Assets	'
	Amortized intangible assets consist of the following (in thousands):
		Total			Acquired			Customer
					Technology			Relationships
	As of September 27, 2013:
	Intangible assets	$	28,437		$	16,037		$	12,400
	Less accumulated amortization		(13,938	)		(8,258	)		(5,680	)
	Intangible assets, net	$	14,499		$	7,779		$	6,720
Summary of Amortization Expense of Intangible Assets	'
	Amortization expense related to amortized intangible assets is as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Cost of revenue	$	1,900		$	1,988		$	1,588
	Selling, general and administrative		1,260			1,317			1,069
	Total	$	3,160		$	3,305		$	2,657
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years	'
	Estimated amortization of the intangible assets in future fiscal years as of September 27, 2013 (in thousands):
	2014	$	3,215
	2015		3,215
	2016		2,450
	2017		1,686
	2018		1,437
	Thereafter		2,496
	Total	$	14,499

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Sep. 27, 2013
Income Tax Disclosure [Abstract]	'
Components of Deferred Tax Assets and Liabilities	'
	The components of the Company’s deferred tax assets and liabilities are as follows (in thousands):
		September 27,			September 28,
		2013			2012
	Current deferred tax assets:
	Accrued liabilities	$	4,361		$	2,546
	Inventory		3,466			3,376
	Deferred revenue		2,251			1,835
	Contingent consideration		—			261
	Accounts receivable		59			246
	Federal net operating loss		267			—
	Current net deferred tax assets	$	10,404		$	8,264
	Non-current deferred tax assets (liabilities):
	Federal and foreign net operating losses and credits	$	4,718		$	4,782
	Intangible assets		(2,554	)		(5,655	)
	Property and equipment		(2,889	)		(2,457	)
	Valuation allowance		(857	)		(761	)
	Non-current net deferred tax assets (liabilities)	$	(1,582	)	$	(4,091	)
	Total deferred tax asset	$	8,822		$	4,173
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
		2013			2012			2011
	United States	$	22,167		$	10,091		$	(16,163	)
	Foreign		14,279			4,846			15,712
	Income (loss) from operations before income taxes	$	36,446		$	14,937		$	(451	)
Components of Provision for Income Taxes	'
	The components of the provision for income taxes are as follows (in thousands):
		Fiscal Years
		2013			2012			2011
	Current:
	Federal	$	11,287		$	10,487		$	8,587
	State		1,512			2,141			1,044
	Foreign		985			1,340			1,047
	Current provision		13,784			13,968			10,678
	Deferred:
	Federal		(3,326	)		2,569			6,006
	State		(1,146	)		258			368
	Foreign		(273	)		(1,387	)		943
	Change in valuation allowance		96			545			(16,676	)
	Deferred provision (benefit)		(4,649	)		1,985			(9,359	)
	Total provision	$	9,135		$	15,953		$	1,319
Reconciliation of Effective Tax Rates	'
	The Company’s effective tax rates differ from the federal and statutory rate as follows:
		Fiscal Years
		2013			2012			2011
	Federal statutory rate		35	%		35	%		(35.0	)%
	Foreign rate differential		(9.5	)		(28.4	)		157.9
	State taxes net of federal benefit		2.1			10.1			203.6
	Change in tax status		—			(9.3	)		—
	Class B Conversion and warrant liabilities		4.1			95.9			3,478.00
	Change in valuation allowance		0.3			3.7			(3,742.6	)
	Research and development credits		(8.0	)		(3.7	)		(277.6	)
	Provision to return adjustments		—			—			325.4
	Nondeductible compensation expense		0.6			1.7			138.2
	Other permanent differences		0.5			1.8			44.6
	Effective income tax rate		25.1	%		106.8	%		292.5	%
Activity Related to Unrecognized Tax Benefits	'
	Activity related to unrecognized tax benefits is as follows (in thousands):
	Balance — October 2, 2010 and September 30, 2011	$	437
	Additions based on current year tax positions		597
	Reductions based on prior year tax positions		(437	)
	Balance — September 28, 2012		597
	Reductions based on prior year tax positions		(597	)
	Balance — September 27, 2013	$	—
Summary of Fiscal Tax Years Examination by Jurisdictions	'
	A summary of the fiscal tax years that remain subject to examination, as of September 27, 2013, for the Company’s significant tax jurisdictions are:
	Jurisdiction	Tax Years
		Subject to Examination
	United States — federal		2000 — forward
	United States — various states		2009 — forward
	Ireland		2009 — forward

ShareBased_Compensation_Plans_

Share-Based Compensation Plans (Tables)	12 Months Ended
	Sep. 27, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees	'
	The following table presents the effects of stock-based compensation expense related to stock-based awards to employees and non-employees in the Company’s consolidated statements of operations during the periods presented (in thousands):
		Fiscal Years
		2013			2012		2011
	Cost of revenue	$	1,068		$	704	$	308
	Research and development		1,739			967		219
	Selling, general and administrative		3,649			1,989		753
	Total	$	6,456		$	3,660	$	1,280
Summary of Stock Option Activity	'
	A summary of stock option activity for fiscal year 2013 is as follows (in thousands, except per share amounts):
		Number of Shares			Weighted-Average		Weighted-Average		Aggregate
					Exercise Price per		Remaining		Intrinsic Value
					Share		Contractual Term
							(in Years)
	Options outstanding — September 28, 2012		1,861		$	1.23		7.1	$	21,352
	Exercised		(614	)
	Canceled or expired		(406	)
	Options outstanding — September 27, 2013		841		$	1.6		6.2	$	13,131
	Options vested and expected to vest — September 27, 2013		816		$	1.6		6.2	$	12,737
	Options exercisable — September 27, 2013		646		$	1.52		6.1	$	10,140
Summary of Stock Options Outstanding	'
	A summary of stock options outstanding as of September 27, 2013 is as follows (in thousands, except per share amounts):
	Exercise Prices	Number of Shares			Weighted		Number of
		Outstanding			Average		Shares
					Contractual		Exercisable
					Term
	$  0.64		354			5.8		307
	2.00		471			6.4		327
	11.08		16			7.7		12
			841			6.2		646
Weighted Average Assumptions used for Calculating Fair Value of Stock Options Granted	'
	No options were granted in fiscal years 2013 and 2012. The weighted-average assumptions used for calculating the fair value of stock options granted during fiscal year 2011 is as follows:
	Risk-free interest rate		1.9	%
	Expected term (years)		5.8
	Expected volatility		52.7	%
	Expected dividends		—	%
Summary of Restricted Stock Activity	'
	A summary of restricted stock awards and units activity for fiscal year 2013 is as follows (in thousands):
		Number of			Weighted-Average		Aggregate
		Shares			Remaining		Intrinsic Value
					Contractual Term
					in Years
	Issued and unvested — September 28, 2012		582			2.9	$	7,391
	Granted		863
	Released		(248	)
	Canceled or expired		(68	)
	Issued and unvested shares — September 27, 2013		1,129			2.9	$	18,148
	Shares expected to vest		1,018			2.9	$	16,362

Preferred_Stock_Tables

Preferred Stock (Tables)	12 Months Ended
	Sep. 27, 2013
Equity [Abstract]	'
Summary of Allocation of Proceeds to and Changes in Carrying Value of Class B	'
	A summary of the allocation of proceeds to and changes in the carrying value of the Class B follows (in thousands):
		Shares			Amount
	Balance — October 2, 2010				$	—
	Issuance of Class B redeemable
	Issuance of Class B redeemable convertible preferred stock		34,170			120,000
	Less:
	Issuance costs					(1,321	)
	Fair value of common stock warrant					(5,656	)
	Fair value of Class B conversion liability					(41,641	)
	Initial recorded value					71,382
	Accretion					4,236
	Balance — September 30, 2011					75,618
	Accretion					2,616
	Reclassification upon conversion of Class B to common stock					(78,234	)
	Balance — September 28, 2012				$	—
Summary of Changes in Carrying Value of Class B Conversion Liability	'
	The following is a summary of the changes in the carrying value of the Class B conversion liability (in thousands):
	Balance — October 2, 2010	$	—
	Estimated fair value upon issuance		41,641
	Change in estimated fair value		39,737
	Balance — September 30, 2011		81,378
	Change in estimated fair value		44,119
	Payment of Class B preference		(60,000	)
	Reclassification upon conversion of Class B to common stock		(65,497	)
	Balance — September 28, 2012	$	—

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Sep. 27, 2013
Equity [Abstract]	'
Summary of Activity of Warrant Liability	'
	The following is a summary of the activity of the warrant liability (in thousands):
	Balance — September 30, 2011	$	10,736
	Change in estimated fair value		(3,175	)
	Balance — September 28, 2012		7,561
	Change in estimated fair value		4,312
	Balance — September 27, 2013	$	11,873

Divestitures_Tables

Divestitures (Tables)	12 Months Ended
	Sep. 27, 2013
Text Block [Abstract]	'
Summary of Operating Results Through Dates of Divestiture Related to Divested Businesses	'
	The following is a summary of operating results in fiscal year 2011 related to the divested businesses (in thousands):
	Revenue	$	5,808
	Income from discontinued operations before income taxes	$	67
	Gain on sale of assets, net		329
	Income tax benefit		358
	Income from discontinued operations, net	$	754

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Sep. 27, 2013
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
		2013		2012			2011
	Numerator:
	Net income (loss) available to controlling interest	$	27,311	$	(1,016	)	$	(1,016	)
	Accretion to redemption value of redeemable convertible preferred stock		—		(2,616	)		(4,236	)
	Dividends declared and paid or payable to preferred stockholders		—		—			(76,216	)
	Net income (loss) attributable to common stockholders	$	27,311	$	(3,632	)	$	(81,468	)
	Dividends declared and paid to common stockholders	$	—	$	—		$	3,784
	Denominator:
	Weighted average common shares outstanding-basic		45,916		24,758			1,505
	Dilutive effect of options and warrants		1,221		—			—
	Weighted average common shares outstanding-diluted		47,137		24,758			1,505
	Common stock earnings per share-basic:
	Distributed	$	—	$	—		$	2.51
	Undistributed		0.59		(0.15	)		(54.13	)
	Net common stock earnings per share	$	0.59	$	(0.15	)	$	(51.62	)
	Common stock earnings per share-diluted:
	Distributed	$	—	$	—		$	2.51
	Undistributed		0.58		(0.15	)		(54.13	)
	Net common stock earnings per share	$	0.58	$	(0.15	)	$	(51.62	)
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
		2013		2012			2011
	Stock options and restricted stock		—		1,821			3,042
	Convertible preferred stock		—		17,733			—
	Warrants		—		141			—
	Total common stock equivalent shares excluded		—		19,695			3,042

Geographic_and_Significant_Cus1

Geographic and Significant Customer Information (Tables)	12 Months Ended
	Sep. 27, 2013
Segment Reporting [Abstract]	'
Summary of Different Geographic Regions	'
	Information about the Company’s operations in different geographic regions, based upon customer locations, is presented below (in thousands):
			Fiscal Years
	Revenue by Geographic Region		2013			2012			2011
	United States		$	186,025		$	159,479		$	166,176
	International (1)			132,693			142,724			144,119
	Total		$	318,718		$	302,203		$	310,295
			As Of
	Long-Lived Assets by Geographic Region		September 27,			September 28,
			2013			2012
	United States		$	25,054		$	23,027
	International (2)			6,509			7,182
	Total		$	31,563		$	30,209
	-1	No international countries represented greater than 10% of total revenue during the periods presented.
	-2	No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia-Pacific region, which accounted for 12%.
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		2013			2012			2011
	Customer A			16	%		18	%		21	%
	Customer B			25	%		16	%		12	%
	Accounts Receivable		September 27,			September 28,
			2013			2012
	Customer A			18	%		16	%
	Customer B			21	%		18	%

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Sep. 27, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Financial Data	'
			First Quarter		Second Quarter			Third Quarter		Fourth Quarter		Fiscal Year
	Fiscal Year 2013
	Revenue		$	75,014	$	77,824		$	82,225	$	83,655	$	318,718
	Gross profit			32,265		33,861			36,293		37,280		139,699
	Net income (1)			6,108		8,086			9,367		3,750		27,311
	Per share data (2)
	Net income, basic		$	0.13	$	0.18		$	0.2	$	0.08	$	0.59
	Net income, diluted		$	0.13	$	0.17		$	0.2	$	0.08	$	0.58
	Fiscal Year 2012
	Revenue		$	73,035	$	77,480		$	77,125	$	74,563	$	302,203
	Gross profit			31,415		36,549			35,404		31,534		134,902
	Net income (loss)			22,042		(53,561	)		13,545		16,958		(1,016	)
	Per share data (2)
	Net income (loss), basic		$	0.43	$	(8.02	)	$	0.3	$	0.37	$	(0.15	)
	Net income (loss), diluted		$	0.2	$	(8.02	)	$	0.29	$	0.36	$	(0.15	)
	-1	The fourth quarter of fiscal year 2013 includes a litigation settlement of $7.3 million.
	-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 do not necessarily equal the full year earnings per share.

Nature_of_Business_Additional_

Nature of Business - Additional Information (Detail)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Organization Consolidation And Presentation Of Financial Statements [Abstract]	'	'	'
Reporting period description	'For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks	'	'
Number of weeks in period	'52 weeks	'52 weeks	'52 weeks

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Schedule of Estimated Useful Life (Detail)	12 Months Ended
	Sep. 27, 2013
Leasehold Improvements [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'Shorter of useful life or term of lease
Minimum [Member] | Machinery and Equipment [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'2 years
Minimum [Member] | Computer Equipment and Software [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'2 years
Minimum [Member] | Furniture and Fixtures [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'7 years
Maximum [Member] | Machinery and Equipment [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'7 years
Maximum [Member] | Computer Equipment and Software [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'5 years
Maximum [Member] | Furniture and Fixtures [Member]	'
Accounting Policies [Line Items]	'
Property plant and equipment estimated useful life	'10 years

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012
Accounting Policies [Line Items]	'	'
Product cost pertaining to deferred revenue	3	3.1
Series A-2 Convertible Preferred Stock [Member]	'	'
Accounting Policies [Line Items]	'	'
Preferred stock cancelled	'	282,681
Shares issued as compensation to employees	74,000	131,000
Minimum [Member]	'	'
Accounting Policies [Line Items]	'	'
Definite-lived intangible asset useful life	'5 years	'
Maximum [Member]	'	'
Accounting Policies [Line Items]	'	'
Definite-lived intangible asset useful life	'10 years	'

Mergers_and_Acquisitions_Addit

Mergers and Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended	12 Months Ended
	Sep. 27, 2013	Apr. 25, 2011	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
		Optomai [Member]	Optomai [Member]	M/A-COM Tech Business [Member]	M/A-COM Tech Business [Member]	M/A-COM Tech Business [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Purchase price of acquisition	'	'	'	'	$30,000,000	'
Contingent consideration cash paid	'	'	'	6,000,000	15,000,000	8,800,000
Incentive compensation expenses	'	'	'	360,000	103,000	277,000
Business acquisition cost of acquired entity, cash paid	'	1,807,000	'	'	'	'
Business acquisition purchase price allocation, liabilities assumed	'	260,000	'	'	'	'
Fair value of the contingent consideration	'	6,624,000	'	'	'	'
Adjustment to related deferred tax liability, tax benefit	'	'	$1,600,000	'	'	'
Weighted-average life of identified intangible assets acquired	'7 years	'	'	'	'	'

Mergers_and_Acquisitions_Sched

Mergers and Acquisitions - Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012	Apr. 25, 2011
In Thousands, unless otherwise specified			Optomai [Member]
Assets acquired:	'	'	'
Property and equipment	'	'	$238
Other assets	'	'	79
Identifiable intangible assets	'	'	4,176
Total assets acquired	'	'	4,493
Liabilities assumed:	'	'	'
Deferred tax liability	'	'	1,599
Other liabilities	'	'	260
Total liabilities assumed	'	'	1,859
Net assets acquired	'	'	2,634
Consideration:	'	'	'
Cash paid at closing	'	'	1,807
Contingent consideration	'	'	4,817
Total consideration	'	'	6,624
Net assets acquired	'	'	2,634
Goodwill	$3,990	$3,990	$3,990

Mergers_and_Acquisitions_Compo

Mergers and Acquisitions - Components of Acquired Intangible Assets (Detail) (Optomai [Member], USD $)	1 Months Ended
In Thousands, unless otherwise specified	Apr. 25, 2011
Acquired Intangible Assets [Line Items]	'
Acquired intangible assets	$4,176
Technology [Member]	'
Acquired Intangible Assets [Line Items]	'
Acquired intangible assets	2,565
Customer Relationships [Member]	'
Acquired Intangible Assets [Line Items]	'
Acquired intangible assets	$1,611

Mergers_and_Acquisitions_Sched1

Mergers and Acquisitions - Schedule of Changes in Fair Value of Contingent Consideration Resulting from Acquisitions (Detail) (M/A-COM Tech Business and Optomai [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
M/A-COM Tech Business and Optomai [Member]	'	'	'
Business Acquisition, Contingent Consideration [Line Items]	'	'	'
Beginning Balance	$6,580	$25,502	$29,300
Acquisition of Optomai	'	'	4,817
Payment - MACOM business acquisition	-6,003	-15,000	-8,825
Change in fair value	-577	-3,922	210
Ending Balance	'	$6,580	$25,502

Financial_Instruments_Financia

Financial Instruments - Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Common stock warrant liability [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	$11,873	$7,561
Contingent Consideration [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	'	6,580
Active Markets for Identical Assets (Level 1) [Member] | Common stock warrant liability [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	'	'
Active Markets for Identical Assets (Level 1) [Member] | Contingent Consideration [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	'	'
Observable Inputs (Level 2) [Member] | Common stock warrant liability [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	'	'
Observable Inputs (Level 2) [Member] | Contingent Consideration [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	'	'
Unobservable Inputs (Level 3) [Member] | Common stock warrant liability [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	11,873	7,561
Unobservable Inputs (Level 3) [Member] | Contingent Consideration [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	'	$6,580

Financial_Instruments_Changes_

Financial Instruments - Changes in Financial Liabilities with Inputs Classified within Level 3 of Fair Value (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Contingent Consideration [Member]	'	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	$6,580	$25,502	$29,300
Net Realized/ Unrealized Losses (Gains) Included in Earnings	-577	-3,922	210
Purchases and Issuances	'	'	4,817
Sales and Settlements	-6,003	-15,000	-8,825
Transfers in and/or (out) of Level 3	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	'	6,580	25,502
Common stock warrant liability [Member]	'	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	7,561	10,736	'
Net Realized/ Unrealized Losses (Gains) Included in Earnings	4,312	-3,175	5,080
Purchases and Issuances	'	'	5,656
Sales and Settlements	'	'	'
Transfers in and/or (out) of Level 3	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	11,873	7,561	10,736
Class B Conversion Liability [Member]	'	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	'	81,378	'
Net Realized/ Unrealized Losses (Gains) Included in Earnings	'	44,119	39,737
Purchases and Issuances	'	'	41,641
Sales and Settlements	'	-125,497	'
Transfers in and/or (out) of Level 3	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	'	'	$81,378

Financial_Instruments_Addition

Financial Instruments - Additional Information (Detail)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012
Fair Value Disclosures [Abstract]	'	'
Expected life of common stock warrants	'7 years 2 months 12 days	'8 years 2 months 12 days
Expected volatility	43.50%	42.90%
Risk free rate	2.02%	1.40%

Allowance_for_Doubtful_Account2

Allowance for Doubtful Accounts - Schedule of Allowance for Doubtful Accounts Related to Accounts Receivable (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Receivables [Abstract]	'	'	'
Balance - beginning of year	$699	$657	$891
Provision (recoveries), net	-443	42	-116
Charge-offs	-61	'	-118
Balance - end of year	$195	$699	$657

Inventories_Components_of_Inve

Inventories - Components of Inventories (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$27,643	$29,922
Work-in-process	5,740	5,472
Finished goods	20,612	22,065
Total	$53,995	$57,459

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 27, 2013
Inventory Disclosure [Abstract]	'
Increase in inventory	$1.10
Reduction to costs of sales	$1.10

Property_and_Equipment_Compone

Property and Equipment - Components of Property and Equipment (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	$65,028	$55,152
Less accumulated depreciation and amortization	-33,465	-24,943
Property and equipment - net	31,563	30,209
Machinery and Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	46,781	38,795
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	5,051	4,876
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	720	699
Construction in Process [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	6,124	4,188
Computer Equipment and Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	$6,352	$6,594

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Property Plant And Equipment Useful Life And Values [Abstract]	'	'	'
Depreciation and amortization expense	$10.20	$8.90	$7.80

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 27, 2013	Sep. 30, 2011	Sep. 28, 2012
Term Note [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Term note payable	$30,000,000	'	'
Revolving Credit Facility [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Revolving credit facility maturity date	'	30-Sep-18	'
Revolving credit facility maximum borrowing availability	'	300,000,000	'
Revolving credit facility interest date	'Borrowings under the revolving credit facility bear either a variable interest rate equal to (i) the greater of the lender's prime rate, the federal funds effective rate plus 0.5%, or an adjusted LIBOR plus 1.0%, in each case plus either an additional 1.25%, 1.50% or 1.75%, subject to certain conditions, or (ii) an adjusted LIBOR rate plus either 2.25%, 2.50% or 2.75%, subject to certain conditions	'	'
Revolving credit facility, LIBOR rate	'Adjusted LIBOR plus 1.0%	'	'
Revolving credit facility federal funds effective rate	'Federal funds effective rate plus 0.5%	'	'
Federal funds effective rate	0.50%	'	'
LIBOR rate	1.00%	'	'
Outstanding borrowing under revolving credit facility	$0	'	$0
Revolving Credit Facility [Member] | Interest Rate LIBOR One [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Adjusted LIBOR rate percentage	1.00%	'	'
Revolving Credit Facility [Member] | Interest Rate LIBOR Two [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Adjusted LIBOR rate percentage	1.25%	'	'
Revolving Credit Facility [Member] | Interest Rate LIBOR Three [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Adjusted LIBOR rate percentage	1.50%	'	'
Revolving Credit Facility [Member] | Interest Rate LIBOR Four [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Adjusted LIBOR rate percentage	2.00%	'	'
Revolving Credit Facility [Member] | Interest Rate LIBOR Five [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Adjusted LIBOR rate percentage	2.25%	'	'
Revolving Credit Facility [Member] | Interest Rate LIBOR Six [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Adjusted LIBOR rate percentage	2.50%	'	'

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Employee Benefit Plans [Line Items]	'	'	'
Employer contribution	$0	$1,000,000	$1,100,000
Foreign Jurisdictions [Member]	'	'	'
Employee Benefit Plans [Line Items]	'	'	'
Discretionary matching contribution	$881,000	$711,000	$681,000

Accrued_Liabilities_Schedule_o

Accrued Liabilities - Schedule of Accrued Liabilities (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Other Liabilities Disclosure [Abstract]	'	'
Compensation and benefits	$9,593	$7,643
Product warranty	522	866
Professional fees	1,905	1,132
Software licenses	1,385	616
Asset retirement obligations - current portion	270	397
Distribution costs	641	624
Restructuring costs	145	328
Other	1,703	2,261
Total	$16,164	$13,867

Commitments_and_Contingencies_1

Commitments and Contingencies - Schedule of Future Minimum Lease Payments for Operating Leases (Detail) (USD $)	Sep. 27, 2013
In Thousands, unless otherwise specified
Commitments And Contingencies Disclosure [Abstract]	'
2014	$3,298
2015	2,820
2016	2,654
2017	2,417
2018	1,570
Thereafter	5,612
Total minimum lease payments	$18,371

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Jan. 28, 2013	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011	Apr. 30, 2011
		Defendant			Employees
Commitments And Contingencies Disclosure [Abstract]	'	'	'	'	'
Rental expenses	'	$3,600,000	$3,900,000	$4,000,000	'
Obligation to reimburse for lease incentives	'	1,000,000	'	'	'
Operating leases, expiration period	'	31-Jan-18	'	'	'
Outstanding unused letters of credit from a bank	'	246,000	'	'	'
Outstanding noncancelable purchase commitments	'	4,400,000	'	'	'
Number of Ex-Employees previously worked for GigOptix	'	'	'	'	5
Number of Ex-Employees conceptualizing a new business venture	'	'	'	'	3
Ex-Employee defendants	'	5	'	'	'
Number of plaintiff's claims, voluntarily dismissed	'	2	'	'	'
One time settlement payments to GigOptix	'	7,250,000	'	'	'
Alleged damages	$2,200,000	'	'	'	'

Commitments_and_Contingencies_3

Commitments and Contingencies - Schedule of Changes in Fair Value of Asset Retirement Obligations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Commitments And Contingencies Disclosure [Abstract]	'	'	'
Balance - beginning of year	$949	$913	$1,819
Payments	-1,403	-41	-705
Accretion expense and settlements	1,323	77	-201
Balance - end of year	$869	$949	$913

Restructurings_Summary_of_Cost

Restructurings - Summary of Costs Related to Restructuring Actions (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Restructuring And Related Activities [Abstract]	'	'	'
Beginning Balance of accrued costs	$328	$522	$765
Current period charges	950	1,862	1,499
Payments	-1,133	-2,056	-1,742
Ending Balance of accrued costs	$145	$328	$522

Product_Warranties_Additional_

Product Warranties - Additional Information (Detail)	12 Months Ended
	Sep. 27, 2013
Automobile Manufacturer's [Member]	'
Product Warranty Disclosure [Line Items]	'
Term of product warranties	'3 years
Minimum [Member]	'
Product Warranty Disclosure [Line Items]	'
Term of product warranties	'12 months
Maximum [Member]	'
Product Warranty Disclosure [Line Items]	'
Term of product warranties	'36 months

Product_Warranties_Schedule_of

Product Warranties - Schedule of Product Warranty Liability Activity (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Payables And Accruals [Abstract]	'	'	'
Balance-beginning of year	$866	$1,885	$2,140
Impact of divestitures	'	'	-17
Provisions	1,083	399	474
Direct charges	-1,427	-1,418	-712
Balance-end of year	$522	$866	$1,885

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	1 Months Ended
	Jul. 31, 2013	Sep. 27, 2013	Sep. 28, 2012
Intangible Assets [Line Items]	'	'	'
Carrying value of trade name	'	$3,400,000	$3,400,000
Goodwill	'	3,990,000	3,990,000
Maximum potential payments to be made for technology licensing and transfer agreement	9,000,000	'	'
Amortization period of acquired technology	'2016	'	'
Minimum [Member]	'	'	'
Intangible Assets [Line Items]	'	'	'
Period of potential payments to be made for technology licensing and transfer agreement	'2016-07	'	'
Optomai [Member]	'	'	'
Intangible Assets [Line Items]	'	'	'
Goodwill	'	$4,000,000	'

Intangible_Assets_Summary_of_A

Intangible Assets - Summary of Amortized Intangible Assets (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	$28,437	$26,154
Less accumulated amortization	-13,938	-10,778
Intangible assets, net	14,499	15,376
Acquired Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	16,037	13,754
Less accumulated amortization	-8,258	-6,358
Intangible assets, net	7,779	7,396
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	12,400	12,400
Less accumulated amortization	-5,680	-4,420
Intangible assets, net	$6,720	$7,980

Intangible_Assets_Summary_of_A1

Intangible Assets - Summary of Amortization Expense of Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Schedule Of Amortization Expenses Recognized [Line Items]	'	'	'
Total	$3,160	$3,305	$2,657
Cost of Revenue [Member]	'	'	'
Schedule Of Amortization Expenses Recognized [Line Items]	'	'	'
Total	1,900	1,988	1,588
Selling, General and Administrative [Member]	'	'	'
Schedule Of Amortization Expenses Recognized [Line Items]	'	'	'
Total	$1,260	$1,317	$1,069

Intangible_Assets_Summary_of_E

Intangible Assets - Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
2014	$3,215	'
2015	3,215	'
2016	2,450	'
2017	1,686	'
2018	1,437	'
Thereafter	2,496	'
Intangible assets, net	$14,499	$15,376

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012
In Thousands, unless otherwise specified
Current deferred tax assets:	'	'
Accrued liabilities	$4,361	$2,546
Inventory	3,466	3,376
Deferred revenue	2,251	1,835
Contingent consideration	'	261
Accounts receivable	59	246
Federal net operating loss	267	'
Current net deferred tax assets	10,404	8,264
Non-current deferred tax assets (liabilities):	'	'
Federal and foreign net operating losses and credits	4,718	4,782
Intangible assets	-2,554	-5,655
Property and equipment	-2,889	-2,457
Valuation allowance	-857	-761
Non-current net deferred tax assets (liabilities)	-1,582	-4,091
Total deferred tax asset	$8,822	$4,173

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Income Taxes [Line Items]	'	'	'
Increase (decrease) in valuation allowance	$96,000	$545,000	($16,676,000)
Remaining valuation allowance	857,000	761,000	'
Increase in tax provision	'	'	842,000
Undistributed earnings	37,200,000	'	'
United States - Federal [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Net operating loss carryforward	$9,900,000	'	'
Expiration beginning year for net operating loss carryforward	'2019	'	'
Expiration ending year for net operating loss carryforward	'2026	'	'

Income_Taxes_Summary_of_Domest

Income Taxes - Summary of Domestic and Foreign Income (Loss) from Continuing Operations Before Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]	'	'	'
United States	$22,167	$10,091	($16,163)
Foreign	14,279	4,846	15,712
Income (loss) from operations before income taxes	$36,446	$14,937	($451)

Income_Taxes_Components_of_Pro

Income Taxes - Components of Provision for Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Current:	'	'	'
Federal	$11,287	$10,487	$8,587
State	1,512	2,141	1,044
Foreign	985	1,340	1,047
Current provision	13,784	13,968	10,678
Deferred:	'	'	'
Federal	-3,326	2,569	6,006
State	-1,146	258	368
Foreign	-273	-1,387	943
Change in valuation allowance	96	545	-16,676
Deferred provision (benefit)	-4,649	1,985	-9,359
Total provision	$9,135	$15,953	$1,319

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Effective Tax Rates (Detail)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]	'	'	'
Federal statutory rate	35.00%	35.00%	-35.00%
Foreign rate differential	-9.50%	-28.40%	157.90%
State taxes net of federal benefit	2.10%	10.10%	203.60%
Change in tax status	'	-9.30%	'
Class B Conversion and warrant liabilities	4.10%	95.90%	3478.00%
Change in valuation allowance	0.30%	3.70%	-3742.60%
Research and development credits	-8.00%	-3.70%	-277.60%
Provision to return adjustments	'	'	325.40%
Nondeductible compensation expense	0.60%	1.70%	138.20%
Other permanent differences	0.50%	1.80%	44.60%
Effective income tax rate	25.10%	106.80%	292.50%

Income_Taxes_Activity_Related_

Income Taxes - Activity Related to Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012
Income Tax Disclosure [Abstract]	'	'
Beginning Balance	$597	$437
Additions based on current year tax positions	'	597
Reductions based on prior year tax positions	-597	-437
Ending Balance	'	$597

Income_Taxes_Summary_of_Fiscal

Income Taxes - Summary of Fiscal Tax Years Examination by Jurisdictions (Detail)	12 Months Ended
	Sep. 27, 2013
United States - Federal [Member]	'
Income Taxes And Tax Related [Line Items]	'
Tax Years Subject to Examination	'2000 - forward
United States - Various States [Member]	'
Income Taxes And Tax Related [Line Items]	'
Tax Years Subject to Examination	'2009 - forward
Ireland [Member]	'
Income Taxes And Tax Related [Line Items]	'
Tax Years Subject to Examination	'2009 - forward

ShareBased_Compensation_Plans_1

Share-Based Compensation Plans - Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Components Of Salaries And Benefits [Line Items]	'	'	'
Total stock-based compensation expense	$6,456	$3,660	$1,280
Cost of Revenue [Member]	'	'	'
Components Of Salaries And Benefits [Line Items]	'	'	'
Total stock-based compensation expense	1,068	704	308
Research and Development [Member]	'	'	'
Components Of Salaries And Benefits [Line Items]	'	'	'
Total stock-based compensation expense	1,739	967	219
Selling, General and Administrative [Member]	'	'	'
Components Of Salaries And Benefits [Line Items]	'	'	'
Total stock-based compensation expense	$3,649	$1,989	$753

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012
	Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Number of equity incentive plans	3	'
Vesting period of options granted	'4 years	'
Percentage of options granted to vest at the end of One year	25.00%	'
Exercisable period of options granted	'10 years	'
Vesting period of RSU granted	'Annually over one, four or five years	'
Shares available for future grants	10,800,000	'
Total intrinsic value of options exercised	$8,400,000	'
Compensation cost expected to be recognized	'10 months 24 days	'
Common stock issued	46,493,000	45,583,000
Non Vested Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total unrecognized compensation cost	175,000	'
Restricted Stock Units [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total unrecognized compensation cost	12,500,000	'
Compensation cost expected to be recognized	'2 years 10 months 24 days	'
2012 Employee Stock Purchase Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total unrecognized compensation cost	$100,000	'
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. The board of directors has provided for an initial offering period of eight months following the IPO, followed by six-month offering periods thereafter.	'
Common stock issued	131,000	0
Increase in common stock available for issuance, maximum percentage	1.25%	'
Increase in common stock available for issuance, shares	550,000	'
2012 Plan [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Increase in common stock available for issuance, maximum percentage	4.00%	'
Increase in common stock available for issuance, shares	1,900,000	'

ShareBased_Compensation_Plans_2

Share-Based Compensation Plans - Summary of Stock Option Activity (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of Shares, Outstanding - Beginning Balance	1,861
Number of Shares, Exercised	-614
Number of Shares, Canceled or expired	-406
Number of Shares, Outstanding - Ending Balance	841
Number of Shares, Options vested and expected to vest-September 27, 2013	816
Number of Shares, Options exercisable-September 27, 2013	646
Weighted-Average Exercise Price Per Share, Outstanding - Beginning Balance	$1.23
Weighted-Average Exercise Price Per Share, Exercised	'
Weighted-Average Exercise Price Per Share, Canceled or expired	'
Weighted-Average Exercise Price Per Share, Outstanding - Ending Balance	$1.60
Weighted-Average Exercise Price Per Share, Options vested and expected to vest-September 27, 2013	$1.60
Weighted-Average Exercise Price Per Share, Options exercisable-September 27, 2013	$1.52
Weighted-Average Remaining Contractual Term (in years), Beginning Balance	'7 years 1 month 6 days
Weighted-Average Remaining Contractual Term (in years), Ending Balance	'6 years 2 months 12 days
Weighted-Average Remaining Contractual Term (in years), Options vested and expected to vest-September 27, 2013	'6 years 2 months 12 days
Weighted-Average Remaining Contractual Term (in years), Options exercisable-September 27, 2013	'6 years 1 month 6 days
Aggregate Intrinsic Value, Beginning Balance	$21,352
Aggregate Intrinsic Value, Ending Balance	13,131
Aggregate Intrinsic Value, Options vested and expected to vest-September 27, 2013	12,737
Aggregate Intrinsic Value, Options exercisable-September 27, 2013	$10,140

ShareBased_Compensation_Plans_3

Share-Based Compensation Plans - Summary of Stock Options Outstanding (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Weighted Average Contractual Term	'6 years 2 months 12 days
Number of Shares Outstanding	841
Number of Shares Exercisable	646
Exercise Price 0.64 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Exercise Prices	0.64
Weighted Average Contractual Term	'5 years 9 months 18 days
Number of Shares Outstanding	354
Number of Shares Exercisable	307
Exercise Price 2.00 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Exercise Prices	2
Weighted Average Contractual Term	'6 years 4 months 24 days
Number of Shares Outstanding	471
Number of Shares Exercisable	327
Exercise Price 11.08 [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Exercise Prices	11.08
Weighted Average Contractual Term	'7 years 8 months 12 days
Number of Shares Outstanding	16
Number of Shares Exercisable	12

ShareBased_Compensation_Plans_4

Share-Based Compensation Plans - Weighted-Average Assumptions used for Calculating Fair Value of Stock Options Granted (Detail)	12 Months Ended
	Sep. 30, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Risk-free interest rate	1.90%
Expected term (years)	'5 years 9 months 18 days
Expected volatility	52.70%
Expected dividends	'

ShareBased_Compensation_Plans_5

Share-Based Compensation Plans - Summary of Restricted Stock and Units Activity (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of shares, Issued and unvested - Beginning Balance	582
Number of shares, Granted	863
Number of shares, Released	-248
Number of shares, Canceled or expired	-68
Number of shares, Issued and unvested - Ending Balance	1,129
Number of Shares, Shares expected to vest	1,018
Weighted-Average Remaining Contractual Term (in years), Unvested-September 28, 2012	'2 years 10 months 24 days
Weighted-Average Remaining Contractual Term (in years), Issued and unvested-June 28, 2013	'2 years 10 months 24 days
Weighted- Average Remaining Contractual Term (in years), Shares expected to vest	'2 years 10 months 24 days
Aggregate Intrinsic Value, Unvested - Beginning Balance	$7,391
Aggregate Intrinsic Value, Issued and unvested - Ending Balance	18,148
Aggregate Intrinsic Value, Shares expected to vest	$16,362

Preferred_Stock_Additional_Inf

Preferred Stock - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended		1 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2010	Sep. 27, 2013	Sep. 28, 2012	Mar. 20, 2012	Dec. 31, 2010	Sep. 27, 2013
				Class B Preferred Stock [Member]	Class B Preferred Stock [Member]	Class B Preferred Stock [Member]
Convertible Preferred Stock Warrants [Line Items]	'	'	'	'	'	'
Preferred stock, shares authorized	'	10,000,000	10,000,000	'	34,169,560	'
Preferred stock, shares issued	'	0	0	'	34,169,560	'
Gross proceeds from issuance of preferred stock	'	'	'	'	$120	'
Net proceeds from issuance of preferred stock	'	'	'	'	118.7	'
Warrants issued to purchase common stock	1,281,358	'	'	'	'	'
Warrants issued to purchase common stock, price per share	$14.05	'	'	'	'	'
Warrants expiration date	21-Dec-20	'	'	'	'	'
Preferred stock Class A and B conversion on completion of IPO	'	'.25 shares of common stock	'	'	'	'
Preference payment made to Class B stockholders	'	'	'	60	'	'
Aggregate fair value of preferred stock	'	'	'	'	'	$106.40

Preferred_Stock_Summary_of_All

Preferred Stock - Summary of Allocation of Proceeds to and Changes in Carrying Value of Class B (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2012	Sep. 30, 2011
Temporary Equity [Line Items]	'	'
Beginning Balance	$75,618	'
Issuance of Class B redeemable	'	'
Issuance costs	'	-1,321
Fair value of common stock warrant	'	-5,656
Fair value of Class B conversion liability	'	-41,641
Initial recorded value	'	71,382
Accretion	2,616	4,236
Ending Balance	'	75,618
Class B Preferred Stock [Member]	'	'
Temporary Equity [Line Items]	'	'
Issuance of Class B redeemable convertible preferred stock, Shares	'	34,170
Issuance of Class B redeemable	'	'
Issuance of Class B redeemable convertible preferred stock	'	120,000
Fair value of Class B conversion liability	'	-41,641
Reclassification upon conversion of Class B to common stock	($78,234)	'

Preferred_Stock_Summary_of_Cha

Preferred Stock - Summary of Changes in Carrying Value of Class B Conversion Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2012	Sep. 30, 2011	Mar. 31, 2012
Convertible Preferred Stock [Line Items]	'	'	'
Beginning Balance	$81,378	'	'
Estimated fair value upon issuance	'	41,641	'
Change in estimated fair value	44,119	39,737	'
Payment of Class B preference	-60,000	'	'
Ending Balance	'	81,378	'
Class B Preferred Stock [Member]	'	'	'
Convertible Preferred Stock [Line Items]	'	'	'
Beginning Balance	'	'	78,200
Estimated fair value upon issuance	'	41,641	'
Payment of Class B preference	-60,000	'	'
Reclassification upon conversion of Class B to common stock	-65,497	'	'
Ending Balance	'	'	$78,200

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended
	Jan. 04, 2011	Mar. 08, 2012	Sep. 27, 2013	Sep. 30, 2011
Class of Warrant or Right [Line Items]	'	'	'	'
Dividends declared and paid	$80,000,000	'	'	'
Payment of dividend	863,000	'	'	863,000
Amount reclaimed against escrow and reclaim of Series A-2 shares	$228,000	'	'	'
Common stock warrants per share	'	'	14.05	'
Warrants expire	'	'	21-Dec-20	'
Reverse stock split approved by board of directors and stockholders	'	'One-for-four	'	'
Series A-1 Convertible Preferred Stock [Member]	'	'	'	'
Class of Warrant or Right [Line Items]	'	'	'	'
Dividends per share	$0.63	'	'	'
Series A-2 Convertible Preferred Stock [Member]	'	'	'	'
Class of Warrant or Right [Line Items]	'	'	'	'
Dividends per share	$0.81	'	'	'
Common Stock [Member]	'	'	'	'
Class of Warrant or Right [Line Items]	'	'	'	'
Dividends per share	$2.44	'	'	'
Common stock warrants	'	'	1,281,358	'

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Activity of Warrant Liability (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012
Statement Of Stockholders Equity [Abstract]	'	'
Beginning Balance	$7,561	$10,736
Change in estimated fair value	4,312	-3,175
Ending Balance	$11,873	$7,561

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Related Party Transaction [Line Items]	'	'	'
Selling, general and administrative expenses	'	$360,000	$720,000
Minimum service requirements or payment obligations	'	0	'
Notice period to terminate agreement	'	'30 days	'
Other income-related party	372,000	185,000	'
Agreement with Ubiquiti Networks, Inc. description	'Two of the Company's directors are also directors of Ubiquiti. An affiliate of one of the directors is also an Ubiquiti stockholder.	'	'
Payments for engineering services based on milestone achievement	500,000	'	'
Recorded revenue pursuant to the terms of the agreement	300,000	200,000	'
Purchased material from GaAs Labs	65,000	'	'
Director [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Recorded revenue pursuant to the terms of the agreement	$242,000	'	'

Divestitures_Additional_Inform

Divestitures - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Jul. 01, 2011
Divestitures [Line Items]	'
Cash proceeds from sale of non-core assets	$3
Business One [Member]	'
Divestitures [Line Items]	'
Gain (loss) on sale of business	1.3
Business Two [Member]	'
Divestitures [Line Items]	'
Gain (loss) on sale of business	$1.60

Divestitures_Summary_of_Operat

Divestitures - Summary of Operating Results Through Dates of Divestiture Related to Divested Businesses (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2011
Income Statement [Abstract]	'
Revenue	$5,808
Income from discontinued operations before income taxes	67
Gain on sale of assets, net	329
Income tax benefit	358
Income from discontinued operations, net	$754

Earnings_Per_Share_Computation

Earnings Per Share - Computation for Basic and Diluted Net Income (Loss) Per Share of Common Stock (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Numerator:	'	'	'	'	'	'	'	'	'	'	'
Net income (loss) available to controlling interest	$3,750	$9,367	$8,086	$6,108	$16,958	$13,545	($53,561)	$22,042	$27,311	($1,016)	($1,016)
Accretion to redemption value of redeemable convertible preferred stock	'	'	'	'	'	'	'	'	'	-2,616	-4,236
Dividends declared and paid or payable to preferred stockholders	'	'	'	'	'	'	'	'	'	'	-76,216
Net income (loss) attributable to common stockholders	'	'	'	'	'	'	'	'	27,311	-3,632	-81,468
Dividends declared and paid to common stockholders	'	'	'	'	'	'	'	'	'	'	$3,784
Denominator:	'	'	'	'	'	'	'	'	'	'	'
Weighted average common shares outstanding-basic	'	'	'	'	'	'	'	'	45,916	24,758	1,505
Weighted average common shares outstanding-diluted	'	'	'	'	'	'	'	'	47,137	24,758	1,505
Common stock earnings per share-basic:	'	'	'	'	'	'	'	'	'	'	'
Distributed	'	'	'	'	'	'	'	'	'	'	$2.51
Undistributed	'	'	'	'	'	'	'	'	$0.59	($0.15)	($54.13)
Net income (loss) - basic	$0.08	$0.20	$0.18	$0.13	$0.37	$0.30	($8.02)	$0.43	$0.59	($0.15)	($54.13)
Common stock earnings per share-diluted:	'	'	'	'	'	'	'	'	'	'	'
Distributed	'	'	'	'	'	'	'	'	'	'	$2.51
Undistributed	'	'	'	'	'	'	'	'	$0.58	($0.15)	($54.13)
Net income (loss) - diluted	$0.08	$0.20	$0.17	$0.13	$0.36	$0.29	($8.02)	$0.20	$0.58	($0.15)	($54.13)
Options and Warrants [Member]	'	'	'	'	'	'	'	'	'	'	'
Denominator:	'	'	'	'	'	'	'	'	'	'	'
Dilutive effect of options and warrants	'	'	'	'	'	'	'	'	1,221	'	'

Earnings_Per_Share_Common_Equi

Earnings Per Share - Common Equivalent Shares Excluded from Calculation from Net Income Per Share (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Total common stock equivalent shares excluded	'	19,695	3,042
Stock Options and Restricted Stock [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Total common stock equivalent shares excluded	'	1,821	3,042
Class B Conversion Liability [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Total common stock equivalent shares excluded	'	17,733	'
Common Stock Warrant Liability [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Total common stock equivalent shares excluded	'	141	'

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail)	Sep. 30, 2011
In Millions, unless otherwise specified
Earnings Per Share [Abstract]	'
Common stock issuable upon exercise of out-of-the money common stock warrants	1.3

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Jan. 04, 2011	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011	Oct. 01, 2010	Mar. 31, 2012	Mar. 31, 2012	Mar. 31, 2012
						Class B Preferred Stock [Member]	Series A-1 [Member]	Series A-2 [Member]
Supplemental Cash Flow Elements [Abstract]	'	'	'	'	'	'	'	'
Unpaid amounts related to purchase of assets	'	$2,400,000	$1,100,000	'	'	'	'	'
Convertible Preferred stock	'	'	'	81,378,000	'	78,200,000	64,000,000	42,400,000
Class B conversion liability	'	'	'	'	'	125,500,000	'	'
Payment of dividend	$863,000	'	'	$863,000	'	'	'	'

Geographic_and_Significant_Cus2

Geographic and Significant Customer Information - Additional Information (Detail)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
	Customer
	Segment
Segment Reporting [Abstract]	'	'	'
Number of reportable operating segment	1	'	'
Number of major customers	10	'	'
Total revenue of customer in percentage	59.00%	55.00%	61.00%
Percentage of geographic segment long-lived assets threshold	10.00%	10.00%	'

Geographic_and_Significant_Cus3

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue by Geographic Region	$83,655	$82,225	$77,824	$75,014	$74,563	$77,125	$77,480	$73,035	$318,718	$302,203	$310,295
Long-Lived Assets by Geographic Region	31,563	'	'	'	30,209	'	'	'	31,563	30,209	'
United States [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue by Geographic Region	'	'	'	'	'	'	'	'	186,025	159,479	166,176
Long-Lived Assets by Geographic Region	25,054	'	'	'	23,027	'	'	'	25,054	23,027	'
International [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Revenue by Geographic Region	'	'	'	'	'	'	'	'	132,693	142,724	144,119
Long-Lived Assets by Geographic Region	$6,509	'	'	'	$7,182	'	'	'	$6,509	$7,182	'

Geographic_and_Significant_Cus4

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Parenthetical) (Detail)	Sep. 27, 2013	Sep. 28, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Percentage of geographic segment revenue threshold	10.00%	10.00%
Percentage of geographic segment long-lived assets threshold	10.00%	10.00%
Asia-Pacific Region [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Percentage of geographic segment long-lived assets threshold	12.00%	12.00%

Geographic_and_Significant_Cus5

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Total Sales and Accounts Receivable (Detail)	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Revenue from External Customer [Line Items]	'	'	'
Revenue	59.00%	55.00%	61.00%
Customer A [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenue	16.00%	18.00%	21.00%
Accounts Receivable	18.00%	16.00%	'
Customer B [Member]	'	'	'
Revenue from External Customer [Line Items]	'	'	'
Revenue	25.00%	16.00%	12.00%
Accounts Receivable	21.00%	18.00%	'

Quarterly_Financial_Data_Sched

Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenue	$83,655	$82,225	$77,824	$75,014	$74,563	$77,125	$77,480	$73,035	$318,718	$302,203	$310,295
Gross profit	37,280	36,293	33,861	32,265	31,534	35,404	36,549	31,415	139,699	134,902	131,860
Net income	$3,750	$9,367	$8,086	$6,108	$16,958	$13,545	($53,561)	$22,042	$27,311	($1,016)	($1,016)
Net income (loss), basic	$0.08	$0.20	$0.18	$0.13	$0.37	$0.30	($8.02)	$0.43	$0.59	($0.15)	($54.13)
Net income (loss), diluted	$0.08	$0.20	$0.17	$0.13	$0.36	$0.29	($8.02)	$0.20	$0.58	($0.15)	($54.13)

Quarterly_Financial_Data_Sched1

Quarterly Financial Data - Schedule of Quarterly Financial Data (Parenthetical) (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2013	Sep. 27, 2013
Quarterly Financial Information Disclosure [Abstract]	'	'
Litigation settlement	$7,300	$7,250

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012	Nov. 05, 2013	Nov. 19, 2013
			Subsequent Event [Member]	Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'	'
Common stock par value amount	$0.00	$0.00	'	$0.01
Purchase price per share	'	'	'	$5.05
Purchase price	'	'	'	$272,000,000
Termination fee to be paid	'	'	9,500,000	'
Services fee paid	'	'	5,400,000	'
Amount of retainer fee included in services fee	'	'	100,000	'
Service fee earned but not yet paid	'	'	500,000	'
Contingent portion of service fee	'	'	$4,800,000	'