MACOM Technology Solutions (MTSI) 10-Q 12 May 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Apr. 04, 2014	Apr. 22, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	4-Apr-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Entity Registrant Name	'M/A-COM Technology Solutions Holdings, Inc.	'
Entity Central Index Key	'0001493594	'
Current Fiscal Year End Date	'--09-27	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	47,267,957

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Apr. 04, 2014	Sep. 27, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$63,139	$110,488
Accounts receivable, net	67,913	63,526
Inventories	71,937	54,908
Income taxes receivable	17,577	915
Prepaid expenses and other current assets	17,380	6,206
Deferred income taxes	10,423	10,404
Total current assets	248,369	246,447
Property and equipment, net	48,268	32,735
Goodwill	15,840	6,750
Intangible assets, net	171,929	24,798
Deferred income taxes	72,479	404
Other assets	9,393	5,501
TOTAL ASSETS	566,278	316,635
Current liabilities:	'	'
Notes payable	4,532	'
Accounts payable	28,520	25,986
Accrued liabilities	40,486	16,921
Income taxes payable	992	20
Deferred revenue	14,899	9,231
Total current liabilities	89,429	52,158
Revolving credit facility	245,000	'
Warrant liability	14,657	11,873
Other long-term liabilities	8,249	3,478
Deferred income taxes	'	1,985
Total liabilities	357,335	69,494
Commitments and contingencies (Note 10)	'	'
Stockholders' equity:	'	'
Preferred stock	'	'
Common stock	47	46
Additional paid-in capital	373,011	379,780
Treasury stock	-330	-330
Accumulated deficit	-163,231	-132,188
Accumulated other comprehensive loss	-554	-167
Total stockholders' equity	208,943	247,141
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$566,278	$316,635

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Income Statement [Abstract]	'	'	'	'
Revenue	$107,827	$78,843	$191,981	$154,919
Cost of revenue	80,964	46,010	129,396	90,600
Gross profit	26,863	32,833	62,585	64,319
Operating expenses:	'	'	'	'
Research and development	20,347	11,204	32,777	21,799
Selling, general and administrative	24,504	13,289	43,887	24,657
Contingent consideration	'	-405	'	-577
Restructuring charges	2,635	'	15,725	'
Total operating expenses	47,486	24,088	92,389	45,879
Income (loss) from operations	-20,623	8,745	-29,804	18,440
Other income (expense)	'	'	'	'
Warrant liability expense	-4,066	-1,069	-2,784	-3,095
Interest expense	-1,622	-200	-2,208	-426
Other income	1,009	86	1,087	170
Total other income (expense)	-4,679	-1,183	-3,905	-3,351
Income (loss) before income taxes	-25,302	7,562	-33,709	15,089
Income tax provision (benefit)	-5,680	2,142	-7,271	5,613
Income (loss) from continuing operations	-19,622	5,420	-26,438	9,476
Loss from discontinued operations	-2,500	'	-4,605	'
Net income (loss)	($22,122)	$5,420	($31,043)	$9,476
Basic income (loss) per share:	'	'	'	'
Income (loss) from continuing operations	($0.42)	$0.12	($0.57)	$0.21
Loss from discontinued operations	($0.05)	'	($0.10)	'
Net income (loss) per share - basic	($0.47)	$0.12	($0.67)	$0.21
Diluted income (loss) per share:	'	'	'	'
Income (loss) from continuing operations	($0.42)	$0.11	($0.57)	$0.20
Loss from discontinued operations	($0.05)	'	($0.10)	'
Net income (loss) per share - diluted	($0.47)	$0.11	($0.67)	$0.20
Shares used:	'	'	'	'
Basic	46,808	45,789	46,656	45,649
Diluted	46,808	47,168	46,656	46,986

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]	'	'	'	'
Net income (loss)	($22,122)	$5,420	($31,043)	$9,476
Foreign currency translation loss	-432	-125	-387	-132
Total comprehensive income (loss)	($22,554)	$5,295	($31,430)	$9,344

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
In Thousands
Balance at Sep. 27, 2013	$247,141	$46	($330)	($167)	$379,780	($132,188)
Balance, Shares at Sep. 27, 2013	'	46,419	23	'	'	'
Capital contributions	3,200	'	'	'	3,200	'
Common control business combination	-26,080	'	'	'	-26,080	'
Tax benefits acquired in common control business combination	6,160	'	'	'	6,160	'
Issuance of common stock upon exercise of common stock options and employee stock purchases	2,295	1	'	'	2,294	'
Issuance of common stock upon exercise of common stock options and employee stock purchases, Shares	306	380	'	'	'	'
Vesting of restricted common stock and units	'	'	'	'	'	'
Vesting of restricted common stock and units, Shares	'	303	'	'	'	'
Share-based compensation	5,135	'	'	'	5,135	'
Common stock repurchased and retired	-300	'	'	'	-300	'
Common stock repurchased and retired, Shares	'	-18	'	'	'	'
Fair value of vested awards assumed in acquisition	1,491	'	'	'	1,491	'
Excess tax benefits	1,331	'	'	'	1,331	'
Foreign currency translation	-387	'	'	-387	'	'
Net loss	-31,043	'	'	'	'	-31,043
Balance at Apr. 04, 2014	$208,943	$47	($330)	($554)	$373,011	($163,231)
Balance, Shares at Apr. 04, 2014	208,943	47,084	23	'	'	'

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'
Net income (loss)	($31,043)	$9,476
Adjustments to reconcile net income (loss) to net cash from operating activities, net of effects from an acquisition:	'	'
Warrant liability expense	2,784	3,095
Depreciation and amortization	15,951	7,815
Impact of inventory valuation step-up in an acquisition	18,053	'
Contingent consideration	'	-577
Deferred income taxes	1,017	'
Loss on disposal of property and equipment	89	'
Share-based compensation	5,135	2,946
Change in operating assets and liabilities, net of effects from an acquisition:	'	'
Payment of contingent consideration	'	-5,328
Accounts receivable	8,345	4,742
Inventories	-3,933	-51
Prepaid expenses and other assets	-1,753	-1,004
Accounts payable	-8,480	-2,262
Accrued and other liabilities	759	-1,768
Income taxes	-16,420	1,391
Deferred revenue	5,212	121
Net cash used in operating activities	-4,284	18,596
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'
Purchases of property and equipment	-5,994	-5,068
Acquisition of businesses	-258,108	'
Sale of business	8,627	'
Acquisition of intellectual property	-4,096	'
Net cash used in investing activities	-259,571	-5,068
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'
Proceeds from revolving credit facility	245,000	'
Capital contributions	3,200	3,795
Proceeds from stock option exercises and employee stock purchases	2,295	1,031
Common stock repurchased and retired	-300	'
Excess tax benefits	1,331	1,312
Payment of assumed debt	-34,952	'
Repurchase of common stock	'	-77
Payments of contingent consideration	'	-675
Other	-68	-130
Net cash from financing activities	216,506	5,256
NET CHANGE IN CASH AND CASH EQUIVALENTS	-47,349	18,784
CASH AND CASH EQUIVALENTS - Beginning of period	110,488	84,600
CASH AND CASH EQUIVALENTS - End of period	63,139	103,384
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'
Cash paid for interest	1,900	235
Cash paid for income taxes	$4,138	$3,381

Description_of_Business_Basis_

Description of Business, Basis of Presentation and Accounting	6 Months Ended
	Apr. 04, 2014
Accounting Policies [Abstract]	'
Description of Business, Basis of Presentation and Accounting	'
	1. DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING
	Description 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 and in high speed communications. Headquartered in Lowell, Massachusetts, MACOM has offices in North America, Europe, Asia and Australia.
	The Company has one reportable operating segment which designs, develops, manufactures and markets semiconductors and modules.
	Basis of Presentation—The accompanying unaudited condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 27, 2013 filed with the SEC on December 5, 2013.
	MACOM acquired Nitronex LLC (Nitronex) in connection with a common-control business combination on February 13, 2014 (Nitronex Acquisition). Nitronex, a supplier of high-performance gallium nitride (GaN) semiconductors for RF, microwave, and millimeterwave applications, was previously acquired by GaAs Labs, LLC (GaAs Labs) on June 25, 2012. GaAs Labs is a stockholder in MACOM and GaAs Labs, Nitronex and MACOM were under common control from June 25, 2012 through February 13, 2014 due to a common controlling stockholder. The accompanying condensed financial statements for the three and six months ended April 4, 2014 and March 29, 2013 include the operations of Nitronex on a combined basis from June 25, 2012 through February 13, 2014 and on a consolidated basis from June 25, 2012 through April 4, 2014. The accompanying condensed financial statements have been presented in a manner similar to a pooling-of-interests, and include the results of operations of each business since the date of common control. All periods from June 25, 2012 have been combined using historical amounts. The accompanying combined consolidated and consolidated financial statements are referred to as “consolidated” for all periods presented.
	The Company’s fiscal year ends on the Friday closest to September 30. For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks. Fiscal year 2013 was 52 weeks in length. Fiscal year 2014 is 53 weeks and the three months and six months ended April 4, 2014 include 13 and 27 weeks, respectively.
	In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2014. The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.
	Use of Estimates—The preparation of consolidated financial statements in conformity with GAAP 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. The accounting policies which our management believes involve the most significant application of judgment, or involve complex estimation include revenue recognition, inventory, warranty obligations, share-based compensation, income taxes and fair value measurements related to purchase accounting and stock warrant liabilities. Actual results could differ from those estimates, and material effects on our operating results and financial position may result.
	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. Generally, revenue is recognized up delivery of products, providing all other criteria is met. When rights of return exist, the Company will provide a reserve for estimated returns at the time of product delivery. When the Company is unable to estimate the amount of its products that may be returned by such distributors or the ultimate sales price of products sold to such distributors, revenue is recognized when the distributors have sold the products to third-party customers, at which point both the return rights and any price protection feature lapse. Accordingly, in this circumstance, the Company defers the recognition of revenue until the products are sold by the distributors to third-party customers and 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. 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.
	Recent Accounting Standards—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.
	In April 2014, the FASB issued Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU 2014-08”), which raises the threshold for disposals to qualify as discontinued operations. A discontinued operation is defined as: (1) a component of an entity or group of components that has been disposed of or classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results; or (2) an acquired business that is classified as held for sale on the acquisition date. ASU 2014-08 also requires additional disclosures regarding discontinued operations, as well as material disposals that do not meet the definition of discontinued operations. The application of this guidance is prospective from the date of adoption and applies only to disposals (or new classifications to held for sale) that have not been reported as discontinued operations in our previously issued financial statements.

Acquisitions

Acquisitions	6 Months Ended
	Apr. 04, 2014
Business Combinations [Abstract]	'
Acquisitions	'
	2. ACQUISITIONS
	Acquisition under Common Control—On February 13, 2014, MACOM acquired Nitronex, an entity under common control, whereby MACOM completed the Nitronex Acquisition for $26.1 million in cash for all of the outstanding ownership interests of Nitronex. The purchase price includes $3.9 million held on account by a third-party escrow agent pending any claims by MACOM in connection with general representation matters made by GaAs Labs in the transaction. The escrow agreement expires in August 2015, at which point if no claims are made, all amounts will be paid to GaAs Labs. The Company has assumed no amount from the escrow will be returned to it in the accounting for the Nitronex Acquisition. MACOM funded the Nitronex Acquisition through the use of available cash and borrowings under its revolving credit facility.
	Acquisition of Mindspeed Technologies, Inc.—On December 18, 2013, MACOM completed the acquisition of Mindspeed Technologies, Inc. (Mindspeed), a supplier of semiconductor solutions for communications infrastructure applications (Mindspeed Acquisition). MACOM acquired Mindspeed to further its expansion into high-performance analog products.
	MACOM completed the Mindspeed Acquisition through a cash tender offer (Offer) by Micro Merger Sub, Inc. (Merger Sub), a wholly-owned subsidiary of MACOM, for all of the outstanding shares of common stock, par value $0.01 per share, of Mindspeed (Shares) at a purchase price of $5.05 per share, net to the seller in cash, without interest, less any applicable withholding taxes (Offer Price). Immediately following the Offer, Merger Sub merged with and into Mindspeed, with Mindspeed surviving as a wholly-owned subsidiary of MACOM. At the effective time of the merger, each Share not acquired in the Offer (other than shares held by MACOM, Merger Sub and Mindspeed, and shares of restricted stock assumed by MACOM in the merger) was converted into the right to receive the Offer Price. MACOM funded the Mindspeed Acquisition through the use of available cash and borrowings under its revolving credit facility (see Note 6). The aggregate purchase price for the Shares, net of cash acquired, was $232.0 million and MACOM assumed $80.4 million of liabilities and incurred costs of $4.5 million expensed in the six months ended April 4, 2014.
	The Mindspeed Acquisition was accounted for as a purchase and the operations of Mindspeed have been included in MACOM’s consolidated financial statements since December 18, 2013, the date of acquisition.
	MACOM is recognizing all assets acquired and liabilities assumed based upon the fair value of such assets and liabilities measured as of the date of acquisition. The aggregate purchase price for Mindspeed is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. A preliminary allocation follows (in thousands):
	Current assets	$	51,801
	Intangible and other assets		253,013
	Total assets acquired		304,814
	Current liabilities		34,966
	Debt		39,824
	Other liabilities		5,595
	Total liabilities assumed		80,385
	Net assets acquired		224,429
	Consideration:
	Cash paid upon closing, net of cash acquired		232,028
	Fair value of vested awards assumed in acquisition		1,491
	Total consideration		233,519
	Goodwill	$	9,090
	In connection with the Mindspeed Acquisition, MACOM assumed all of the outstanding options and all unvested restricted stock awards under Mindspeed’s equity plans and converted such options and stock awards into equivalent MACOM awards under the same general terms and conditions as were in existence with adjustments made to shares and exercise prices, if any, pursuant to a formula stipulated in the terms of the acquisition. The fair value of the assumed options and stock awards was $4.8 million, of which $1.5 million relates to vested stock options and has been included in the purchase consideration and the remainder relates to unvested stock options and stock awards, which will be expensed as the remaining services are provided.
	The components of the acquired intangible assets on a preliminary basis were as follows (in thousands):
		Above			Useful Lives
					(Years)
	Developed technology	$	118,180		7
	Customer relationships		12,920		10
	In-process research and development		21,580		N/A
		$	152,680
	The overall weighted-average life of the identified intangible assets acquired in the acquisition is estimated to be 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.
	The purchase accounting is preliminary and subject to completion, including the areas of taxation where a study of the potential utilization of acquired net operating losses is not yet complete, and certain fair value measurements, particularly the finalization of the valuation assessment of the acquired tangible and intangible assets. The adjustments arising from the completion of the outstanding matters may materially affect the preliminary purchase accounting and would be retroactively reflected in the financial statements as of April 4, 2014 and for the interim periods then ended.
	The following is a summary of Mindspeed revenue and earnings, excluding a restructuring charge and change-in-control payments aggregating $14.9 million, included in MACOM’s accompanying condensed consolidated statements of operations for the six months ended April 4, 2014 (in thousands):
	Revenue	$	33,809
	Loss from continuing operations before income taxes		(22,707	)
	Subsequent to closing the Mindspeed Acquisition, MACOM divested the wireless business of Mindspeed. The operations of the wireless business are included in discontinued operations and the assets of the wireless business are presented as assets held for sale. The Company completed the sale of the wireless business in February 2014. The accompanying condensed consolidated statement of operations for the three and six months ended April 4, 2014 include the following operating results related to the business to be divested (in thousands):
		Periods Ended April 4, 2014
		Three Months			Six Months
	Revenue	$	1,983		$	2,440
	Loss before income taxes		(4,007	)		(7,381	)
	Benefit for income taxes		1,507			2,776
	Loss from discontinued operations, net		(2,500	)		(4,605	)
	Supplemental Pro Forma Data
	The pro forma statements of operations data for the six months ended April 4, 2014 below give effect to the acquisition, described above, as if it had occurred at September 28, 2013. These amounts have been calculated after applying MACOM’s accounting policies and adjusting the results of Mindspeed to reflect the additional depreciation and amortization that would have been charged assuming the fair value adjustments to property, plant and equipment and intangible assets and additional interest expense on acquisition-related borrowings had been applied and incurred since September 28, 2013. The supplemental pro forma earnings for the six months ended April 4, 2014 were adjusted to exclude discontinued operations, acquisition costs of $4.5 million paid by MACOM, seller-related professional fees incurred by Mindspeed prior to the acquisition, amortization and impairments of intangible assets incurred by Mindspeed prior to the acquisition and $14.9 million of restructuring charges and change-in-control payments, as well as the impact of the step-up to fair value of the acquired inventory. This pro forma data is presented for informational purposes only and does not purport to be indicative of the Company’s future results of operations.
	Revenue	$	211,437
	Net loss		(28,234	)

Financial_Instruments

Financial Instruments	6 Months Ended
	Apr. 04, 2014
Fair Value Disclosures [Abstract]	'
Financial Instruments	'
	3. FINANCIAL INSTRUMENTS
	Financial liabilities measured at fair value on a recurring basis consist of the following (in thousands):
		April 4, 2014
		Fair		Active			Observable		Unobservable
		Value		Markets			Inputs		Inputs
				for			(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Common stock warrant liability	$	14,657	$	—		$	—	$	14,657
		September 27, 2013
		Fair		Active			Observable		Unobservable
		Value		Markets			Inputs		Inputs
				for			(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Common stock warrant liability	$	11,873	$	—		$	—	$	11,873
	The changes in financial liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):
		Three Months Ended April 4, 2014
		January 3,		Net Realized/			Purchases		Sales and			Transfers in		April 4,
		2014		Unrealized			and		Settlements			and/or (out)		2014
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Stock warrant liability	$	10,591	$	4,066		$	—	$	—		$	—	$	14,657
		Three Months Ended March 29, 2013
		December 28,		Net Realized/			Purchases		Sales and			Transfers in		March 29,
		2012		Unrealized			and		Settlements			and/or (out)		2013
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	405	$	(405	)	$	—	$	—		$	—	$	—
	Stock warrant liability	$	9,587	$	1,069		$	—	$	—		$	—	$	10,656
		Six Months Ended April 4, 2014
		September 27,		Net Realized/			Purchases		Sales and			Transfers in		April 4,
		2013		Unrealized			and Issuances		Settlements			and/or (out) of		2014
				Losses (Gains)								Level 3
				Included in
				Earnings
	Stock warrant liability	$	11,873	$	2,784		$	—	$	—		$	—	$	14,657
		Six Months Ended March 29, 2013
		September 28,		Net Realized/			Purchases		Sales and			Transfers in		March 29,
		2012		Unrealized			and Issuances		Settlements			and/or (out) of		2013
				Losses (Gains)								Level 3
				Included in
				Earnings
	Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—
	Stock warrant liability	$	7,561	$	3,095		$	—	$	—		$	—	$	10,656
	As of April 4, 2014, the fair value of the common stock warrants has been estimated using a Black-Scholes option pricing model giving consideration to the quoted market price of the common stock on that date, an expected life of 6.7 years, expected volatility of 42.6% and risk free rate of 2.3%.
	These estimates include significant judgments about potential future liquidity events and actual results could differ and could have an 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.

Inventories

Inventories	6 Months Ended
	Apr. 04, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	4. INVENTORIES
	Inventories consist of the following (in thousands):
		April 4,		September 27,
		2014		2013
	Raw materials	$	36,242	$	27,855
	Work-in-process		7,031		6,021
	Finished goods		28,664		21,032
	Total	$	71,937	$	54,908

Property_and_Equipment

Property and Equipment	6 Months Ended
	Apr. 04, 2014
Property Plant And Equipment [Abstract]	'
Property and Equipment	'
	5. PROPERTY AND EQUIPMENT
	Property and equipment consists of the following (in thousands):
		April 4,			September 27,
		2014			2013
	Machinery and equipment	$	63,822		$	48,051
	Leasehold improvements		7,998			5,129
	Furniture and fixtures		1,017			782
	Construction in process		8,082			6,234
	Computer equipment and software		7,758			7,908
	Total property and equipment		88,677			68,104
	Less accumulated depreciation and amortization		(40,409	)		(35,369	)
	Property and equipment — net	$	48,268		$	32,735
	Depreciation and amortization expense related to property and equipment for the three and six months ended April 4, 2014 was $3.9 million and $7.1 million, respectively. Depreciation and amortization expense related to property and equipment for the three and six months ended March 29, 2013 was $2.7 million and $5.4 million, respectively.

Debt

Debt	6 Months Ended
	Apr. 04, 2014
Debt Disclosure [Abstract]	'
Debt	'
	6. DEBT
	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.
	On November 5, 2013, the Company entered into an amendment to its revolving credit facility, 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 Mindspeed Acquisition.
	On May 8, 2014, the Company refinanced its outstanding indebtedness under its existing revolving credit facility and discharged its obligations thereunder by entering into a credit agreement (Credit Agreement) with Goldman Sachs Bank USA and a syndicate of lenders. Concurrent with the execution of the Credit Agreement, the Company terminated its existing revolving credit facility. The Credit Agreement provides for term loans in an aggregate principal amount of $350.0 million, which mature in May 2021, and a revolving credit facility of up to $100.0 million, which matures in May 2019.
	In connection with the Mindspeed and Nitronex acquisitions, MACOM drew down $245.0 million of indebtedness on its revolving credit facility, all of which remained outstanding as of April 4, 2014.
	As of April 4, 2014, the Company had $3.5 million of outstanding notes assumed in the Mindspeed Acquisition, which accrue interest at a rate of 6.5% per annum. The notes are payable at $4.5 million upon demand by the holder at any time and, if not paid earlier, become due in June 2017.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	6 Months Ended
	Apr. 04, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	7. GOODWILL AND INTANGIBLE ASSETS
	Amortization expense related to intangible assets is as follows (in thousands):
		Three Months Ended						Six Months Ended
		April 4,			March 29,			April 4,		March 29,
		2014			2013			2014		2013
	Cost of revenue	$	6,504		$	745		$	8,022	$	1,490
	Selling, general and administrative		484			334			869		668
	Total	$	6,988		$	1,079		$	8,891	$	2,158
	Intangible assets consist of the following (in thousands):
		April 4,			September 27,
		2014			2013
	Acquired technology	$	145,159		$	23,637
	Customer relationships		26,070			13,150
	In-process research and development		21,580			—
	Trade name		3,400			3,400
	Total		196,209			40,187
	Less accumulated amortization		(24,280	)		(15,389	)
	Intangible assets —   net	$	171,929		$	24,798
	A summary of the activity in intangible assets and goodwill follows (in thousands):
		Total			Acquired			Customer		In-Process		Trade		Goodwill
					Technology			Relationships		Research and		Name
										Development
	Balance at September 27, 2013	$	46,937		$	23,637		$	13,150	$	—	$	3,400	$	6,750
	Mindspeed Acquisition		161,770			118,180			12,920		21,580		—		9,090
	Other intangibles purchased		3,342			3,342			—		—		—		—
	Balance at April 4, 2014	$	212,049		$	145,159		$	26,070	$	21,580	$	3,400	$	15,840
	The trade name and in-process research and development (IPR&D) are indefinite-lived intangible assets. During development, IPR&D is not subject to amortization and is tested for impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired. The impairment test consists of a comparison of the fair value to its carrying amount. If the carrying value exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. Once an IPR&D project is complete, it becomes a definite long-lived intangible asset and is evaluated for impairment in accordance with the Company’s policy for long-lived assets.
	Accumulated amortization for the acquired technology and customer relationships was $17.6 million and $6.7 million, respectively, as of April 4, 2014 and $9.6 million and $5.8 million, respectively, as of September 27, 2013.
	As of April 4, 2014, estimated amortization of the intangible assets in future fiscal years, subject to the completion of the purchase price allocation for the Mindspeed Acquisition, was as follows (in thousands):
	2014 (rest of fiscal year)	$	14,055
	2015		26,773
	2016		24,089
	2017		21,889
	2018		18,316
	Thereafter		41,827
	Total	$	146,949

Stockholders_Equity

Stockholder's Equity	6 Months Ended
	Apr. 04, 2014
Equity [Abstract]	'
Stockholder's Equity	'
	8. STOCKHOLDER’S EQUITY
	The Company has authorized 10 million shares of $0.001 par value preferred stock and 300 million shares of $0.001 par value common stock as of April 4, 2014.
	Outstanding shares of our common stock as of April 4, 2014 and September 27, 2013 presented in the accompanying condensed consolidated statements of stockholders’ equity exclude 158,000 and 74,000 unvested shares of restricted common stock, respectively, issued as compensation to employees that remained subject to forfeiture.
	The Company has presented payments in the form of capital contributions received by Nitronex from the majority stockholder prior to the Nitronex Acquisition as an increase to additional paid-in capital.

Income_Loss_Per_Share

Income (Loss) Per Share	6 Months Ended
	Apr. 04, 2014
Earnings Per Share [Abstract]	'
Income (Loss) Per Share	'
	9. INCOME (LOSS) PER SHARE
	Basic net income (loss) per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net income per share is computed using the weighted-average number of common shares and, if dilutive, potential common shares outstanding during the period. The Company’s potential dilutive common shares consist of common shares issuable upon the exercise of warrants, stock options and vesting of restricted stock units. The dilutive effect of outstanding stock options is reflected in diluted earnings per share by application of the treasury stock method.
	The following table sets forth the computation for basic and diluted net income per share of common stock (in thousands, except per share data):
		Three Months Ended					Six Months Ended
		April 4,			March 29,		April 4,			March 29,
		2014			2013		2014			2013
	Numerator:
	Net income (loss)	$	(22,122	)	$	5,420	$	(31,043	)	$	9,476
	Denominator:
	Weighted average common shares outstanding-basic		46,808			45,789		46,656			45,649
	Dilutive effect of options and warrants		—			1,379		—			1,337
	Weighted average common shares outstanding-diluted		46,808			47,168		46,656			46,986
	Common stock income (loss) per share:
	Basic	$	(0.47	)	$	0.12	$	(0.67	)	$	0.21
	Diluted	$	(0.47	)	$	0.11	$	(0.67	)	$	0.2
	The table above excludes the effects of shares of common stock issuable upon exercise of stock options and warrants for the three and six months ended April 4, 2014 as the inclusion of which would be antidilutive.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Apr. 04, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	10. COMMITMENTS AND CONTINGENCIES
	Purchase Commitments—As of April 4, 2014 and September 27, 2013, the Company had outstanding non-cancelable purchase commitments aggregating $4.1 million and $4.4 million, respectively, pursuant to inventory supply arrangements. The Company has a long-term technology licensing and transfer commitment that calls for remaining potential payments by the Company of up to $5.2 million through July 2016.
	Litigation—The Company is periodically subject to legal proceedings, claims and contingencies arising in the ordinary course of business.
	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 our purported failure to honor an alleged minimum purchase commitment contract with respect to certain semiconductor chips previously supplied by CSR for use in the Company’s automotive module product. The complaint claims alleged damages of $2.2 million and asks for attorney’s fees and other remedies. We filed an answer to the complaint on January 28, 2013. The parties have concluded fact discovery and CSR has filed a motion for summary judgment. We are opposing that motion and, if we are successful in doing so, we intend to continue to defend the lawsuit vigorously.
	Mindspeed Tender Offer Litigation in Delaware and California.
	Following our November 2013 announcement of the execution of a definitive agreement between us and Mindspeed Technologies, Inc. (Mindspeed) contemplating a tender offer by us for all outstanding shares of common stock of Mindspeed and thereafter a merger with Mindspeed (Merger), a number of purported class action lawsuits were filed against Mindspeed, its directors, the Company’s merger subsidiary and the Company in the Delaware Court of Chancery and the California Superior Court for Orange County.
	The complaints alleged, 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 sought, among other things, equitable relief that would have enjoined the consummation of the Merger, rescission of the Merger, damages, and attorneys’ fees and costs.
	Further Discussion of Delaware Tender Offer Litigation. On November 22, 2013, an amended complaint was filed in the Delaware Court of Chancery. The amended complaint included similar allegations to the original complaint, along with claims that the Mindspeed Schedule 14D-9 filed in connection with the Merger included misstatements or omissions of material facts. On November 25, 2013, a motion for preliminary injunction was filed in the Delaware Court of Chancery in the Hoffman Action. On December 3, 2013, all of the complaints filed in the Delaware Court of Chancery were consolidated (Delaware Actions).
	On December 6, 2013, the plaintiffs in the Delaware Actions filed their brief in support of a motion to enjoin the proposed Merger. While the Defendants denied the allegations made in the lawsuits and maintain that they have committed no wrongdoing whatsoever, to permit the timely consummation of the Merger, and without admitting the validity of any allegations made in the lawsuits, the Defendants concluded that it was desirable that the Delaware Actions be resolved.
	On December 9, 2013, the Defendants’ and plaintiffs’ counsel in the Delaware Actions entered into a memorandum of understanding to settle the Delaware Actions and to resolve all allegations which were brought or could have been brought by the purported class of Mindspeed shareholder plaintiffs. The proposed settlement, which is subject to confirmatory discovery and court approval, provides for the release of all claims against the Defendants relating to the proposed Merger. In connection with the settlement, Mindspeed agreed to provide additional supplemental disclosures concerning the tender offer as reflected in Amendment No. 3 to the Schedule 14D-9 filed with the SEC on December 10, 2013, which supplement the information provided in the Schedule 14D-9. There can be no assurance that the settlement will be finalized or that the Delaware Court of Chancery will approve the settlement. After the parties entered into the memorandum of understanding, the motion for a preliminary injunction was withdrawn and the hearing vacated in the Delaware Actions. The Merger closed on December 18, 2013.
	Further Discussion of California Tender Offer Litigation. On December 5, 2013, an amended complaint was filed in one of the California actions. The amended complaint includes similar allegations to the original complaint along with claims that the Mindspeed Schedule 14D-9 filed in connection with the Merger included misstatements or omissions of material facts. On December 5, 2013, the plaintiffs filed an ex parte application for an order shortening time in which to bring a motion for expedited discovery, which was denied on December 6, 2013.
	On December 30, 2013, the California Court entered an Initial Case Management Order. Among other things, the Initial Case Management Order set an Initial Case Management Conference for February 4, 2014 and stayed all discovery and motion practice until that date. On January 6, 2014, the Defendants filed notices of special appearance and intent to file, or join in, a motion to stay or dismiss the amended complaint. The Case Management Conference has been continued until July 14, 2014.
	The Company intends to continue to defend the aforementioned 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.

Restructurings

Restructurings	6 Months Ended
	Apr. 04, 2014
Restructuring And Related Activities [Abstract]	'
Restructurings	'
	11. RESTRUCTURINGS
	The Company has periodically implemented restructuring actions in connection with broader plans to reduce staffing, reduce its internal manufacturing footprint and, generally, reduce operating costs. The restructuring expenses are comprised of direct and incremental costs related to change-in-control obligations of $11.5 million, 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-September 27, 2013	$	145
	Current period charges - continuing operations		15,725
	Payments		(4,819	)
	Balance-April 4, 2014	$	11,051
	In the six months ended April 4, 2014, the Company implemented restructuring plans to reduce manufacturing and operating costs of the Mindspeed and Nitronex operations through a reduction of staffing. These restructuring plans resulted in a charge to continuing operations, representing the initial cost of the actions that will continue into the third and possibly fourth quarters of fiscal year 2014. These costs are expected to be paid through fiscal year 2014.

ShareBased_Compensation

Share-Based Compensation	6 Months Ended
	Apr. 04, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Share-Based Compensation	'
	12. SHARE-BASED COMPENSATION
	The following table presents the effects of share-based compensation expense related to share-based awards to employees and non-employees in the Company’s condensed consolidated statements of operations during the periods presented (in thousands):
		Three Months Ended					Six Months Ended
		April 4,			March 29,		April 4,		March 29,
		2014			2013		2014		2013
	Cost of revenue	$	426		$	292	$	709	$	609
	Research and development		728			484		1,212		856
	Selling, general and administrative		2,136			907		3,214		1,841
	Total stock-based compensation expense	$	3,290		$	1,683	$	5,135	$	3,306
	Effective September 28, 2013, pursuant to an “evergreen” provision, the number of shares of common stock available for issuance under the 2012 Omnibus Incentive Plan (2012 Plan) and the 2012 Employee Stock Purchase Plan (ESPP) were increased by 1.9 million shares and 0.6 million shares, respectively. As of April 4, 2014, MACOM had 10.5 million shares available for future grants under the 2012 Plan.
	Stock option activity for the six months ended April 4, 2014, is as follows (in thousands, except per share amounts):
		Number of			Weighted-		Weighted-		Aggregate
		Shares			Average		Average		Intrinsic
					Exercise Price		Remaining		Value
					Per Share		Contractual
							Term
							(in years)
	Outstanding-September 27, 2013		841		$	1.6		6.2	$	13,131
	Assumed in Mindspeed Acquisition		439			24.5
	Granted		—			—
	Exercised		(306	)		4.61
	Forfeited, canceled or expired		(78	)		35.16
	Outstanding-April 4, 2014		896		$	8.92		4.8	$	11,223
	Options vested and expected to vest as of April 4, 2014		896		$	8.92		4.8	$	11,223
	Options vested and exercisable as of April 4, 2014		813		$	9.29		4.7	$	9,956
	Aggregate intrinsic value represents the difference between the Company’s closing stock price on April 4, 2014 and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $4.2 million for the six months ended April 4, 2014. As of April 4, 2014, total unrecognized compensation cost, excluding the impact of the assumed Mindspeed stock options, adjusted for estimated forfeitures, related to unvested stock options was $0.1 million, which is expected to be recognized over the next 0.1 years.
	A summary of restricted stock and restricted stock units activity for the six months ended April 4, 2014, is as follows (in thousands):
		Number of			Weighted-		Aggregate
		Shares			Average		Intrinsic
					Remaining		Value
					Contractual
					Term
					(in years)
	Unvested-September 27, 2013		1,129			2.9	$	18,148
	Assumed in Mindspeed Acquisition		285
	Granted		724
	Vested and released		(303	)
	Forfeited, canceled or expired		(107	)
	Issued and unvested-April 4, 2014		1,728			2.8	$	34,824
	Shares expected to vest-April 4, 2014		1,529			2.8	$	30,803
	The total intrinsic value of restricted stock awards vesting was $5.1 million for the six months ended April 4, 2014. As of April 4, 2014, total unrecognized compensation cost, excluding the impact of the assumed Mindspeed stock awards, adjusted for estimated forfeitures, related to restricted stock and units was $19.0 million, which is expected to be recognized over the next 2.8 years.
	As of April 4, 2014, total unrecognized compensation cost related to the ESPP was not material.
	Certain of the share-based awards granted and outstanding as of April 4, 2014 are subject to accelerated vesting upon a sale of the Company or similar changes in control.
	There were no material modifications to stock-based awards during the periods presented.

Income_Taxes

Income Taxes	6 Months Ended
	Apr. 04, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	13. INCOME TAXES
	The Company is subject to income tax in the United States as well as other tax jurisdictions in which it conducts business. Earnings from non-U.S. activities are subject to local country income tax and may also be subject to current U.S. income tax. For interim periods, the Company records a tax provision or benefit based upon the estimated effective tax rate expected for the full fiscal year, adjusted for material discrete taxation matters arising during the interim periods.
	The difference between the U.S. federal statutory income tax rate of 35% and the Company’s effective income tax rates for the three and six months ended April 4, 2014 and March 29, 2013 was primarily impacted in both periods by changes in fair values of the common stock warrant liability which is not deductible nor taxable for tax purposes, income taxed in foreign jurisdictions at generally lower tax rates, offset by U.S. state income taxes, and, for the three and six months ended April 4, 2014, by nondeductible expenses for tax purposes resulting from the Mindspeed Acquisition.
	At the closing of the Mindspeed Acquisition, Mindspeed had, on a preliminary basis, federal net operating loss (NOL) carryforwards of approximately $683.7 million, which will expire at various dates through 2033, and federal research and development tax credit carryforwards of $19.5 million. Both the NOL and the tax credits are subject to change-in-control limitations within the Internal Revenue Code and, accordingly, these carryforwards were reduced to $305.9 million, the estimated realizable amount after consideration of the limitations. The NOL carryforwards and tax credits are included in the computation of net deferred income tax assets arising from the Mindspeed Acquisition. The aggregate net deferred income tax assets acquired in the Mindspeed Acquisition is estimated to be $85.7 million, which includes a net deferred income tax liability of $68.9 million related to the difference between the book and tax bases of the intangible and other assets acquired in the acquisition. A valuation allowance of $16.8 million was also recorded to reduce the overall net deferred tax assets to estimated realizable value.
	The tax effect of the difference between the book and tax bases in the net assets acquired in the Nitronex Acquisition of $6.2 million has been recorded as an increase to additional paid-in capital in the three and six months ended April 4, 2014.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Apr. 04, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	14. RELATED PARTY TRANSACTIONS
	GaAs Labs, a stockholder and an affiliate of directors and majority stockholders John and Susan Ocampo, engaged the Company to provide 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 the three and six months ended April 4, 2014, the Company billed GaAs Labs $40,000 and $118,000, respectively, and for the three and six months ended March 29, 2013, the Company billed GaAs Labs $86,000 and $170,000, respectively, for services provided pursuant to this agreement and has recorded these amounts as other income in the accompanying condensed consolidated statements of operations.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	6 Months Ended
	Apr. 04, 2014
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flow Information	'
	15. SUPPLEMENTAL CASH FLOW INFORMATION
	As of April 4, 2014 and March 29, 2013, the Company had $568,000 and $1.0 million, respectively, in unpaid amounts related to purchases of property and equipment included in accounts payable and accrued liabilities. These amounts have been excluded from the payments for purchases of property and equipment in the accompanying condensed consolidated statements of cash flows until paid.
	Upon closing the Mindspeed Acquisition, MACOM assumed $39.8 million of the seller’s indebtedness, $35.0 million of which was paid in the six months ended April 4, 2014.

Geographic_and_Significant_Cus

Geographic and Significant Customer Information	6 Months Ended
	Apr. 04, 2014
Segment Reporting [Abstract]	'
Geographic and Significant Customer Information	'
	16. GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION
	Information about the Company’s operations in different geographic regions, based upon customer locations, is presented below (in thousands):
			Three Months Ended						Six Months Ended
	Revenue by Geographic Region		April 4,			March 29,			April 4,			March 29,
			2014			2013			2014			2013
	United States		$	50,915		$	47,281		$	104,804		$	92,617
	International (1)			56,912			31,562			87,177			62,302
	Total		$	107,827		$	78,843		$	191,981		$	154,919
			As of
	Long-Lived Assets by Geographic Region		April 4,			September 27,
			2014			2013
	United States		$	40,962		$	26,226
	International (2)			7,306			6,509
	Total		$	48,268		$	32,735
	-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 that represented 12% of total long-lived assets as of September 27, 2013.
	The following is a summary of customer concentrations as a percentage of total sales and accounts receivable as of and for the periods presented:
			Three Months Ended						Six Months Ended
	Revenue		April 4,			March 29,			April 4,			March 29,
			2014			2013			2014			2013
	Customer A			13	%		15	%		18	%		15	%
	Customer B			19	%		25	%		21	%		25	%
			As of
	Accounts Receivable		April 4,			September 27,
			2014			2013
	Customer A			17	%		18	%
	Customer B			18	%		21	%
	No other customer represented more than 10% of revenue or accounts receivable in the periods presented in the accompanying consolidated financial statements. For the three months ended April 4, 2014 and March 29, 2013, ten customers represented 64% and 61% of total revenue, respectively. For the six months ended April 4, 2014 and March 29, 2013, ten customers represented 62% and 61% of total revenue, respectively.

Subsequent_Events

Subsequent Events	6 Months Ended
	Apr. 04, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	17. SUBSEQUENT EVENTS
	On May 8, 2014, the Company refinanced its outstanding indebtedness under its existing revolving credit facility and discharged its obligations thereunder by entering into a credit agreement (Credit Agreement) with Goldman Sachs Bank USA and a syndicate of lenders. Concurrent with the execution of the Credit Agreement, the Company terminated its existing revolving credit facility. The Credit Agreement provides for term loans in an aggregate principal amount of $350.0 million, which mature in May 2021 (Term Loans), and a revolving credit facility of up to $100.0 million, which matures in May 2019 (Revolving Facility). The Term Loans were issued with an original issue discount of 0.75%, which is being amortized over the term of the Term Loans using the effective interest rate method. Borrowings under both the Term Loans and the Revolving Facility bear interest at variable rates payable quarterly. The Term Loans are payable in quarterly principal installments of 0.25% of the aggregate Term Loans on the last business day of each calendar quarter, beginning on the last business day of September 2014, with the remainder due on the maturity date. At the signing of the Credit Agreement, the Company drew down the entire $350 million principal amount of the Term Loans, and no draws were made on the Revolving Facility. The Term Loans and Revolving Facility are secured by a first priority lien on substantially all of the Company’s assets and provide that the Company must comply with certain financial and non-financial covenants.
	On May 9, 2014, the Company’s subsidiary Mindspeed Technologies, Inc. completed the sale of its CPE communication processor product line.

Description_of_Business_Basis_1

Description of Business, Basis of Presentation and Accounting (Policies)	6 Months Ended
	Apr. 04, 2014
Accounting Policies [Abstract]	'
Description of Business	'
	Description 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 and in high speed communications. Headquartered in Lowell, Massachusetts, MACOM has offices in North America, Europe, Asia and Australia.
	The Company has one reportable operating segment which designs, develops, manufactures and markets semiconductors and modules.
Basis of Presentation	'
	Basis of Presentation—The accompanying unaudited condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 27, 2013 filed with the SEC on December 5, 2013.
	MACOM acquired Nitronex LLC (Nitronex) in connection with a common-control business combination on February 13, 2014 (Nitronex Acquisition). Nitronex, a supplier of high-performance gallium nitride (GaN) semiconductors for RF, microwave, and millimeterwave applications, was previously acquired by GaAs Labs, LLC (GaAs Labs) on June 25, 2012. GaAs Labs is a stockholder in MACOM and GaAs Labs, Nitronex and MACOM were under common control from June 25, 2012 through February 13, 2014 due to a common controlling stockholder. The accompanying condensed financial statements for the three and six months ended April 4, 2014 and March 29, 2013 include the operations of Nitronex on a combined basis from June 25, 2012 through February 13, 2014 and on a consolidated basis from June 25, 2012 through April 4, 2014. The accompanying condensed financial statements have been presented in a manner similar to a pooling-of-interests, and include the results of operations of each business since the date of common control. All periods from June 25, 2012 have been combined using historical amounts. The accompanying combined consolidated and consolidated financial statements are referred to as “consolidated” for all periods presented.
	The Company’s fiscal year ends on the Friday closest to September 30. For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks. Fiscal year 2013 was 52 weeks in length. Fiscal year 2014 is 53 weeks and the three months and six months ended April 4, 2014 include 13 and 27 weeks, respectively.
	In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2014. The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.
Use of Estimates	'
	Use of Estimates—The preparation of consolidated financial statements in conformity with GAAP 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. The accounting policies which our management believes involve the most significant application of judgment, or involve complex estimation include revenue recognition, inventory, warranty obligations, share-based compensation, income taxes and fair value measurements related to purchase accounting and stock warrant liabilities. Actual results could differ from those estimates, and material effects on our operating results and financial position may result.
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. Generally, revenue is recognized up delivery of products, providing all other criteria is met. When rights of return exist, the Company will provide a reserve for estimated returns at the time of product delivery. When the Company is unable to estimate the amount of its products that may be returned by such distributors or the ultimate sales price of products sold to such distributors, revenue is recognized when the distributors have sold the products to third-party customers, at which point both the return rights and any price protection feature lapse. Accordingly, in this circumstance, the Company defers the recognition of revenue until the products are sold by the distributors to third-party customers and 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. 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.
Recent Accounting Standards	'
	Recent Accounting Standards—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.
	In April 2014, the FASB issued Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (“ASU 2014-08”), which raises the threshold for disposals to qualify as discontinued operations. A discontinued operation is defined as: (1) a component of an entity or group of components that has been disposed of or classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results; or (2) an acquired business that is classified as held for sale on the acquisition date. ASU 2014-08 also requires additional disclosures regarding discontinued operations, as well as material disposals that do not meet the definition of discontinued operations. The application of this guidance is prospective from the date of adoption and applies only to disposals (or new classifications to held for sale) that have not been reported as discontinued operations in our previously issued financial statements.

Acquisitions_Tables

Acquisitions (Tables)	6 Months Ended
	Apr. 04, 2014
Business Combinations [Abstract]	'
Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed	'
	The aggregate purchase price for Mindspeed is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. A preliminary allocation follows (in thousands):
	Current assets	$	51,801
	Intangible and other assets		253,013
	Total assets acquired		304,814
	Current liabilities		34,966
	Debt		39,824
	Other liabilities		5,595
	Total liabilities assumed		80,385
	Net assets acquired		224,429
	Consideration:
	Cash paid upon closing, net of cash acquired		232,028
	Fair value of vested awards assumed in acquisition		1,491
	Total consideration		233,519
	Goodwill	$	9,090
Components of Acquired Intangible Assets on a Preliminary Basis	'
	The components of the acquired intangible assets on a preliminary basis were as follows (in thousands):
		Above			Useful Lives
					(Years)
	Developed technology	$	118,180		7
	Customer relationships		12,920		10
	In-process research and development		21,580		N/A
		$	152,680
Summary of Revenue and Earnings	'
	The following is a summary of Mindspeed revenue and earnings, excluding a restructuring charge and change-in-control payments aggregating $14.9 million, included in MACOM’s accompanying condensed consolidated statements of operations for the six months ended April 4, 2014 (in thousands):
	Revenue	$	33,809
	Loss from continuing operations before income taxes		(22,707	)
Condensed Consolidated Statement of Operations Related to Divested Business	'
	The accompanying condensed consolidated statement of operations for the three and six months ended April 4, 2014 include the following operating results related to the business to be divested (in thousands):
		Periods Ended April 4, 2014
		Three Months			Six Months
	Revenue	$	1,983		$	2,440
	Loss before income taxes		(4,007	)		(7,381	)
	Benefit for income taxes		1,507			2,776
	Loss from discontinued operations, net		(2,500	)		(4,605	)
Summary of Supplemental Pro Forma Data	'
	This pro forma data is presented for informational purposes only and does not purport to be indicative of the Company’s future results of operations.
	Revenue	$	211,437
	Net loss		(28,234	)

Financial_Instruments_Tables

Financial Instruments (Tables)	6 Months Ended
	Apr. 04, 2014
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):
		April 4, 2014
		Fair		Active			Observable		Unobservable
		Value		Markets			Inputs		Inputs
				for			(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Common stock warrant liability	$	14,657	$	—		$	—	$	14,657
		September 27, 2013
		Fair		Active			Observable		Unobservable
		Value		Markets			Inputs		Inputs
				for			(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Common stock warrant liability	$	11,873	$	—		$	—	$	11,873
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):
		Three Months Ended April 4, 2014
		January 3,		Net Realized/			Purchases		Sales and			Transfers in		April 4,
		2014		Unrealized			and		Settlements			and/or (out)		2014
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Stock warrant liability	$	10,591	$	4,066		$	—	$	—		$	—	$	14,657
		Three Months Ended March 29, 2013
		December 28,		Net Realized/			Purchases		Sales and			Transfers in		March 29,
		2012		Unrealized			and		Settlements			and/or (out)		2013
				Losses (Gains)			Issuances					of Level 3
				Included in
				Earnings
	Contingent consideration	$	405	$	(405	)	$	—	$	—		$	—	$	—
	Stock warrant liability	$	9,587	$	1,069		$	—	$	—		$	—	$	10,656
		Six Months Ended April 4, 2014
		September 27,		Net Realized/			Purchases		Sales and			Transfers in		April 4,
		2013		Unrealized			and Issuances		Settlements			and/or (out) of		2014
				Losses (Gains)								Level 3
				Included in
				Earnings
	Stock warrant liability	$	11,873	$	2,784		$	—	$	—		$	—	$	14,657
		Six Months Ended March 29, 2013
		September 28,		Net Realized/			Purchases		Sales and			Transfers in		March 29,
		2012		Unrealized			and Issuances		Settlements			and/or (out) of		2013
				Losses (Gains)								Level 3
				Included in
				Earnings
	Contingent consideration	$	6,580	$	(577	)	$	—	$	(6,003	)	$	—	$	—
	Stock warrant liability	$	7,561	$	3,095		$	—	$	—		$	—	$	10,656

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Apr. 04, 2014
Inventory Disclosure [Abstract]	'
Components of Inventories	'
	Inventories consist of the following (in thousands):
		April 4,		September 27,
		2014		2013
	Raw materials	$	36,242	$	27,855
	Work-in-process		7,031		6,021
	Finished goods		28,664		21,032
	Total	$	71,937	$	54,908

Property_and_Equipment_Tables

Property and Equipment (Tables)	6 Months Ended
	Apr. 04, 2014
Property Plant And Equipment [Abstract]	'
Components of Property and Equipment	'
	Property and equipment consists of the following (in thousands):
		April 4,			September 27,
		2014			2013
	Machinery and equipment	$	63,822		$	48,051
	Leasehold improvements		7,998			5,129
	Furniture and fixtures		1,017			782
	Construction in process		8,082			6,234
	Computer equipment and software		7,758			7,908
	Total property and equipment		88,677			68,104
	Less accumulated depreciation and amortization		(40,409	)		(35,369	)
	Property and equipment — net	$	48,268		$	32,735

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Apr. 04, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Summary of Amortization Expense of Intangible Assets	'
	Amortization expense related to intangible assets is as follows (in thousands):
		Three Months Ended						Six Months Ended
		April 4,			March 29,			April 4,		March 29,
		2014			2013			2014		2013
	Cost of revenue	$	6,504		$	745		$	8,022	$	1,490
	Selling, general and administrative		484			334			869		668
	Total	$	6,988		$	1,079		$	8,891	$	2,158
Summary of Intangible Assets	'
	Intangible assets consist of the following (in thousands):
		April 4,			September 27,
		2014			2013
	Acquired technology	$	145,159		$	23,637
	Customer relationships		26,070			13,150
	In-process research and development		21,580			—
	Trade name		3,400			3,400
	Total		196,209			40,187
	Less accumulated amortization		(24,280	)		(15,389	)
	Intangible assets —   net	$	171,929		$	24,798
Summary of Activity in Intangible Assets and Goodwill	'
	A summary of the activity in intangible assets and goodwill follows (in thousands):
		Total			Acquired			Customer		In-Process		Trade		Goodwill
					Technology			Relationships		Research and		Name
										Development
	Balance at September 27, 2013	$	46,937		$	23,637		$	13,150	$	—	$	3,400	$	6,750
	Mindspeed Acquisition		161,770			118,180			12,920		21,580		—		9,090
	Other intangibles purchased		3,342			3,342			—		—		—		—
	Balance at April 4, 2014	$	212,049		$	145,159		$	26,070	$	21,580	$	3,400	$	15,840
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years	'
	As of April 4, 2014, estimated amortization of the intangible assets in future fiscal years, subject to the completion of the purchase price allocation for the Mindspeed Acquisition, was as follows (in thousands):
	2014 (rest of fiscal year)	$	14,055
	2015		26,773
	2016		24,089
	2017		21,889
	2018		18,316
	Thereafter		41,827
	Total	$	146,949

Income_Loss_Per_Share_Tables

Income (Loss) Per Share (Tables)	6 Months Ended
	Apr. 04, 2014
Earnings Per Share [Abstract]	'
Computation for Basic and Diluted Net Income Per Share of Common Stock	'
	The following table sets forth the computation for basic and diluted net income per share of common stock (in thousands, except per share data):
		Three Months Ended					Six Months Ended
		April 4,			March 29,		April 4,			March 29,
		2014			2013		2014			2013
	Numerator:
	Net income (loss)	$	(22,122	)	$	5,420	$	(31,043	)	$	9,476
	Denominator:
	Weighted average common shares outstanding-basic		46,808			45,789		46,656			45,649
	Dilutive effect of options and warrants		—			1,379		—			1,337
	Weighted average common shares outstanding-diluted		46,808			47,168		46,656			46,986
	Common stock income (loss) per share:
	Basic	$	(0.47	)	$	0.12	$	(0.67	)	$	0.21
	Diluted	$	(0.47	)	$	0.11	$	(0.67	)	$	0.2

Restructurings_Tables

Restructurings (Tables)	6 Months Ended
	Apr. 04, 2014
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-September 27, 2013	$	145
	Current period charges - continuing operations		15,725
	Payments		(4,819	)
	Balance-April 4, 2014	$	11,051

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	6 Months Ended
	Apr. 04, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Non-Employees	'
	The following table presents the effects of share-based compensation expense related to share-based awards to employees and non-employees in the Company’s condensed consolidated statements of operations during the periods presented (in thousands):
		Three Months Ended					Six Months Ended
		April 4,			March 29,		April 4,		March 29,
		2014			2013		2014		2013
	Cost of revenue	$	426		$	292	$	709	$	609
	Research and development		728			484		1,212		856
	Selling, general and administrative		2,136			907		3,214		1,841
	Total stock-based compensation expense	$	3,290		$	1,683	$	5,135	$	3,306
Summary of Stock Option Activity	'
	Stock option activity for the six months ended April 4, 2014, is as follows (in thousands, except per share amounts):
		Number of			Weighted-		Weighted-		Aggregate
		Shares			Average		Average		Intrinsic
					Exercise Price		Remaining		Value
					Per Share		Contractual
							Term
							(in years)
	Outstanding-September 27, 2013		841		$	1.6		6.2	$	13,131
	Assumed in Mindspeed Acquisition		439			24.5
	Granted		—			—
	Exercised		(306	)		4.61
	Forfeited, canceled or expired		(78	)		35.16
	Outstanding-April 4, 2014		896		$	8.92		4.8	$	11,223
	Options vested and expected to vest as of April 4, 2014		896		$	8.92		4.8	$	11,223
	Options vested and exercisable as of April 4, 2014		813		$	9.29		4.7	$	9,956
Summary of Restricted Stock and Restricted Stock Units Activity	'
	A summary of restricted stock and restricted stock units activity for the six months ended April 4, 2014, is as follows (in thousands):
		Number of			Weighted-		Aggregate
		Shares			Average		Intrinsic
					Remaining		Value
					Contractual
					Term
					(in years)
	Unvested-September 27, 2013		1,129			2.9	$	18,148
	Assumed in Mindspeed Acquisition		285
	Granted		724
	Vested and released		(303	)
	Forfeited, canceled or expired		(107	)
	Issued and unvested-April 4, 2014		1,728			2.8	$	34,824
	Shares expected to vest-April 4, 2014		1,529			2.8	$	30,803

Geographic_and_Significant_Cus1

Geographic and Significant Customer Information (Tables)	6 Months Ended
	Apr. 04, 2014
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):
			Three Months Ended						Six Months Ended
	Revenue by Geographic Region		April 4,			March 29,			April 4,			March 29,
			2014			2013			2014			2013
	United States		$	50,915		$	47,281		$	104,804		$	92,617
	International (1)			56,912			31,562			87,177			62,302
	Total		$	107,827		$	78,843		$	191,981		$	154,919
			As of
	Long-Lived Assets by Geographic Region		April 4,			September 27,
			2014			2013
	United States		$	40,962		$	26,226
	International (2)			7,306			6,509
	Total		$	48,268		$	32,735
	-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 that represented 12% of total long-lived assets as of September 27, 2013.
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:
			Three Months Ended						Six Months Ended
	Revenue		April 4,			March 29,			April 4,			March 29,
			2014			2013			2014			2013
	Customer A			13	%		15	%		18	%		15	%
	Customer B			19	%		25	%		21	%		25	%
			As of
	Accounts Receivable		April 4,			September 27,
			2014			2013
	Customer A			17	%		18	%
	Customer B			18	%		21	%

Description_of_Business_Basis_2

Description of Business, Basis of Presentation and Accounting - Additional Information (Detail)	0 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended
	Apr. 04, 2014	Apr. 04, 2014	Jan. 03, 2014	Apr. 04, 2014	Sep. 27, 2013
				Segment
Description Of Business And Basis Of Presentation [Line Items]	'	'	'	'	'
Number of reportable operating segment	'	'	'	1	'
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	'53 weeks	'13 weeks	'14 weeks	'27 weeks	'52 weeks
Nitronex LLC [Member]	'	'	'	'	'
Description Of Business And Basis Of Presentation [Line Items]	'	'	'	'	'
Date of Acquisition	'	'	'	13-Feb-14	'

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended	6 Months Ended
	Apr. 04, 2014	Apr. 04, 2014	Dec. 18, 2013	Apr. 04, 2014	Feb. 13, 2014	Apr. 04, 2014
			Mindspeed [Member]	Mindspeed [Member]	Nitronex LLC [Member]	Nitronex LLC [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'
Date of Acquisition	'	'	'	'	'	13-Feb-14
Business acquisition cost of acquired entity, cash paid	'	'	'	'	$26,100,000	'
Escrow deposit	'	'	'	'	3,900,000	'
Escrow agreement expiration period	'	'	'	'	'	'2015-08
Amount to be return from escrow account	'	'	'	'	0	'
Outstanding shares of common stock, par value	$0.00	$0.00	$0.01	'	'	'
Outstanding shares of common stock at a purchase price per share	'	'	$5.05	'	'	'
Purchase price of acquisition	'	258,108,000	232,028,000	232,000,000	'	'
Liabilities and incurred costs	'	'	80,385,000	80,400,000	'	'
Business combination acquisition related costs	'	'	'	4,500,000	'	'
The fair value of the assumed options and stock awards	'	'	'	4,800,000	'	'
Stock option vested	'	'	'	1,500,000	'	'
Weighted-average life of identified intangible assets acquired	'	'	'	'7 years	'	'
Aggregate amount of restructuring charge and change-in-control payments	2,635,000	15,725,000	'	14,900,000	'	'
Acquisition costs of discontinued operations	'	'	'	$4,500,000	'	'

Acquisitions_Schedule_of_Aggre

Acquisitions - Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed (Detail) (USD $)	6 Months Ended		0 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Sep. 27, 2013	Dec. 18, 2013	Apr. 04, 2014
			Mindspeed [Member]	Mindspeed [Member]
Loans At Acquisition Date [Line Items]	'	'	'	'
Current assets	'	'	$51,801	'
Intangible and other assets	'	'	253,013	'
Total assets acquired	'	'	304,814	'
Current liabilities	'	'	34,966	'
Debt	'	'	39,824	'
Other liabilities	'	'	5,595	'
Total liabilities assumed	'	'	80,385	80,400
Net assets acquired	'	'	224,429	'
Consideration:	'	'	'	'
Cash paid upon closing, net of cash acquired	258,108	'	232,028	232,000
Fair value of vested awards assumed in acquisition	'	'	1,491	'
Total consideration	'	'	233,519	'
Goodwill	$15,840	$6,750	$9,090	'

Acquisitions_Components_of_Acq

Acquisitions - Components of Acquired Intangible Assets on a Preliminary Basis (Detail) (USD $)	6 Months Ended	0 Months Ended		6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Dec. 18, 2013	Dec. 18, 2013	Apr. 04, 2014	Dec. 18, 2013	Apr. 04, 2014	Dec. 18, 2013
		Mindspeed [Member]	Developed Technology [Member]	Customer Relationships [Member]	Customer Relationships [Member]	In-Process Research and Development [Member]	In-Process Research and Development [Member]
			Mindspeed [Member]		Mindspeed [Member]		Mindspeed [Member]
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'	'	'
Acquired intangible assets	$161,770	$152,680	$118,180	$12,920	$12,920	$21,580	$21,580
Acquired intangible assets, Useful Lives	'	'	'7 years	'	'10 years	'	'

Acquisitions_Summary_of_Revenu

Acquisitions - Summary of Revenue and Earnings (Detail) (Mindspeed [Member], USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014
Mindspeed [Member]	'
Business Acquisition [Line Items]	'
Revenue	$33,809
Loss from continuing operations before income taxes	($22,707)

Acquisitions_Condensed_Consoli

Acquisitions - Condensed Consolidated Statement of Operations Related to Divested Business (Detail) (Mindspeed [Member], USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Apr. 04, 2014
Mindspeed [Member]	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Revenue	$1,983	$2,440
Loss before income taxes	-4,007	-7,381
Benefit for income taxes	1,507	2,776
Loss from discontinued operations, net	($2,500)	($4,605)

Acquisitions_Summary_of_Supple

Acquisitions - Summary of Supplemental Pro Forma Data (Detail) (Mindspeed [Member], USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014
Mindspeed [Member]	'
Business Acquisition [Line Items]	'
Revenue	$211,437
Net loss	($28,234)

Financial_Instruments_Financia

Financial Instruments - Financial Liabilities Measured at Fair Value on Recurring Basis (Detail) (Common Stock Warrant Liability [Member], USD $)	Apr. 04, 2014	Sep. 27, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	$14,657	$11,873
Active Markets for Identical Assets (Level 1) [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]	'	'
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]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Financial liabilities measured at fair value on a recurring basis	$14,657	$11,873

Financial_Instruments_Changes_

Financial Instruments - Changes in Financial Liabilities with Inputs Classified within Level 3 of Fair Value (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
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	$10,591	$9,587	$11,873	$7,561
Net Realized/ Unrealized Losses (Gains) Included in Earnings	4,066	1,069	2,784	3,095
Purchases and Issuances	'	'	'	'
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	14,657	10,656	14,657	10,656
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	'	405	'	6,580
Net Realized/ Unrealized Losses (Gains) Included in Earnings	'	-405	'	-577
Purchases and Issuances	'	'	'	'
Sales and Settlements	'	'	'	-6,003
Transfers in and/or (out) of Level 3	'	'	'	'
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	'	'	'	'

Financial_Instruments_Addition

Financial Instruments - Additional Information (Detail)	0 Months Ended
	Apr. 04, 2014
Fair Value Disclosures [Abstract]	'
Expected life of common stock warrants	'6 years 8 months 12 days
Expected volatility	42.60%
Risk free rate	2.30%

Inventories_Components_of_Inve

Inventories - Components of Inventories (Detail) (USD $)	Apr. 04, 2014	Sep. 27, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$36,242	$27,855
Work-in-process	7,031	6,021
Finished goods	28,664	21,032
Total	$71,937	$54,908

Property_and_Equipment_Compone

Property and Equipment - Components of Property and Equipment (Detail) (USD $)	Apr. 04, 2014	Sep. 27, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	$88,677	$68,104
Less accumulated depreciation and amortization	-40,409	-35,369
Property and equipment - net	48,268	32,735
Machinery and Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	63,822	48,051
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	7,998	5,129
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	1,017	782
Construction in Process [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	8,082	6,234
Computer Equipment and Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property and equipment	$7,758	$7,908

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Property Plant And Equipment Useful Life And Values [Abstract]	'	'	'	'
Depreciation and amortization expense	$3.90	$2.70	$7.10	$5.40

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)

6 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

Apr. 04, 2014

Apr. 04, 2014

Sep. 26, 2013

Apr. 04, 2014

8-May-14

Apr. 04, 2014

Apr. 04, 2014

Apr. 04, 2014

Apr. 04, 2014

Apr. 04, 2014

Apr. 04, 2014

8-May-14

Mindspeed [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Term Loans [Member]

Subsequent Event [Member]

Interest Rate LIBOR One [Member]

Interest Rate LIBOR Two [Member]

Interest Rate LIBOR Three [Member]

Interest Rate LIBOR Four [Member]

Interest Rate LIBOR Five [Member]

Interest Rate LIBOR Six [Member]

Subsequent Event [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Revolving credit facility maturity date

'

'

30-Sep-18

'

31-May-19

'

'

'

'

'

'

31-May-21

Revolving credit facility maximum borrowing availability

'

'

$300,000,000

'

$100,000,000

'

'

'

'

'

'

$350,000,000

Revolving credit facility interest rate

'

'

'

'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.

'

'

'

'

'

'

'

'

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%

'

'

'

'

'

'

'

'

Adjusted LIBOR rate percentage

'

'

'

'

'

1.00%

1.25%

1.50%

2.00%

2.25%

2.50%

'

Indebtedness on revolving credit facility

245,000,000

'

'

'

'

'

'

'

'

'

'

'

Revolving credit facility, outstanding

245,000,000

'

'

'

'

'

'

'

'

'

'

'

Outstanding notes payable

'

3,500,000

'

'

'

'

'

'

'

'

'

'

Notes payable, interest rate

'

6.50%

'

'

'

'

'

'

'

'

'

'

Expected maturity period

'

'Due in June 2017

'

'

'

'

'

'

'

'

'

'

Notes payable

'

$4,500,000

'

'

'

'

'

'

'

'

'

'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Summary of Amortization Expense of Intangible Assets (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Schedule Of Amortization Expenses Recognized [Line Items]	'	'	'	'
Total	$6,988	$1,079	$8,891	$2,158
Cost of Revenue [Member]	'	'	'	'
Schedule Of Amortization Expenses Recognized [Line Items]	'	'	'	'
Total	6,504	745	8,022	1,490
Selling, General and Administrative [Member]	'	'	'	'
Schedule Of Amortization Expenses Recognized [Line Items]	'	'	'	'
Total	$484	$334	$869	$668

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) (USD $)	Apr. 04, 2014	Sep. 27, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	$196,209	$40,187
Less accumulated amortization	-24,280	-15,389
Intangible assets - net	171,929	24,798
Acquired Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	145,159	23,637
Less accumulated amortization	-17,600	-9,600
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	26,070	13,150
Less accumulated amortization	-6,700	-5,800
In-Process Research and Development [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	21,580	'
Trade Name [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Intangible assets	$3,400	$3,400

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014
Finite-Lived Intangible Assets [Line Items]	'
Balance - September 27, 2013	$46,937
Mindspeed Acquisition	161,770
Other intangibles purchased	3,342
Balance - April 4, 2014	212,049
Acquired Technology [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Balance - September 27, 2013	23,637
Mindspeed Acquisition	118,180
Other intangibles purchased	3,342
Balance - April 4, 2014	145,159
Customer Relationships [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Balance - September 27, 2013	13,150
Mindspeed Acquisition	12,920
Other intangibles purchased	'
Balance - April 4, 2014	26,070
In-Process Research and Development [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Balance - September 27, 2013	'
Mindspeed Acquisition	21,580
Other intangibles purchased	'
Balance - April 4, 2014	21,580
Trade Name [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Balance - September 27, 2013	3,400
Mindspeed Acquisition	'
Other intangibles purchased	'
Balance - April 4, 2014	3,400
Goodwill [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Balance - September 27, 2013	6,750
Mindspeed Acquisition	9,090
Other intangibles purchased	'
Balance - April 4, 2014	$15,840

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	Apr. 04, 2014	Sep. 27, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Accumulated amortization	$24,280	$15,389
Acquired Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Accumulated amortization	17,600	9,600
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Accumulated amortization	$6,700	$5,800

Goodwill_and_Intangible_Assets6

Goodwill and Intangible Assets - Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years (Detail) (USD $)	Apr. 04, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
2014 (rest of fiscal year)	$14,055
2015	26,773
2016	24,089
2017	21,889
2018	18,316
Thereafter	41,827
Amortizable intangible assets - net	$146,949

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	Apr. 04, 2014	Sep. 27, 2013
Statement Of Stockholders Equity [Abstract]	'	'
Preferred stock, par value	$0.00	'
Preferred stock, shares authorized	10,000,000	'
Common stock, par value	$0.00	'
Common stock, shares authorized	300,000,000	'
Unvested shares of restricted common stock excluded from outstanding shares	158,000	74,000

Income_Loss_Per_Share_Computat

Income (Loss) Per Share - Computation for Basic and Diluted Net Income Per Share of Common Stock (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Numerator:	'	'	'	'
Net income (loss)	($22,122)	$5,420	($31,043)	$9,476
Denominator:	'	'	'	'
Weighted average common shares outstanding - basic	46,808	45,789	46,656	45,649
Weighted average common shares outstanding - diluted	46,808	47,168	46,656	46,986
Common stock income (loss) per share:	'	'	'	'
Basic	($0.47)	$0.12	($0.67)	$0.21
Diluted	($0.47)	$0.11	($0.67)	$0.20
Options and Warrants [Member]	'	'	'	'
Denominator:	'	'	'	'
Dilutive effect of options and warrants	'	1,379	'	1,337

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Jan. 28, 2013	Apr. 04, 2014	Apr. 04, 2014	Sep. 27, 2013
Contingencies And Commitments [Line Items]	'	'	'	'
Long term technology licensing and transfer commitment	'	$4.10	'	$4.40
Long term technology licensing and transfer commitment, Expiry Date	'	'	'2016-07	'
Alleged damages	2.2	'	'	'
Maximum [Member]	'	'	'	'
Contingencies And Commitments [Line Items]	'	'	'	'
Long term technology licensing and transfer commitment	'	'	5.2	'

Restructurings_Additional_Info

Restructurings - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Apr. 04, 2014
Restructuring And Related Activities [Abstract]	'
Severance and outplacement fees for the terminated employees	$11.50

Restructurings_Summary_of_Cost

Restructurings - Summary of Costs Related to Restructuring Actions (Detail) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Apr. 04, 2014
Restructuring And Related Activities [Abstract]	'	'
Beginning Balance of accrued costs	'	$145
Current period charges - continuing operations	2,635	15,725
Payments	'	-4,819
Ending Balance of accrued costs	$11,051	$11,051

ShareBased_Compensation_Effect

Share-Based Compensation - Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Non-Employees (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Components Of Salaries And Benefits [Line Items]	'	'	'	'
Total stock-based compensation expense	$3,290	$1,683	$5,135	$3,306
Cost of Revenue [Member]	'	'	'	'
Components Of Salaries And Benefits [Line Items]	'	'	'	'
Total stock-based compensation expense	426	292	709	609
Research and Development [Member]	'	'	'	'
Components Of Salaries And Benefits [Line Items]	'	'	'	'
Total stock-based compensation expense	728	484	1,212	856
Selling, General and Administrative [Member]	'	'	'	'
Components Of Salaries And Benefits [Line Items]	'	'	'	'
Total stock-based compensation expense	$2,136	$907	$3,214	$1,841

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Apr. 04, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total intrinsic value of options exercised	$4.20
Compensation cost expected to be recognized	'1 month 6 days
Total intrinsic value of awards vesting	5.1
Restricted Stock Units [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total unrecognized compensation cost	19
Compensation cost expected to be recognized	'2 years 9 months 18 days
Omnibus Incentive Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Increase in common stock available for issuance, shares	1.9
2012 Employee Stock Purchase Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Increase in common stock available for issuance, shares	0.6
Future grants	10.5
Unvested Stock Options [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total unrecognized compensation cost	$0.10

ShareBased_Compensation_Summar

Share-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 04, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of Shares, Outstanding - September 27, 2013	841
Number of Shares, Assumed in Mindspeed Acquisition	439
Number of Shares, Granted	'
Number of Shares, Exercised	-306
Number of Shares, Forfeited, canceled or expired	-78
Number of Shares, Outstanding - April 4, 2014	896
Number of Shares, Options vested and expected to vest as of April 4, 2014	896
Number of Shares, Options vested and exercisable as of April 4, 2014	813
Weighted-Average Exercise Price Per Share, Outstanding - September 27, 2013	$1.60
Weighted-Average Exercise Price Per Share, Assumed in Mindspeed Acquisition	$24.50
Weighted-Average Exercise Price Per Share, Granted	'
Weighted-Average Exercise Price Per Share, Exercised	$4.61
Weighted-Average Exercise Price Per Share, Forfeited, canceled or expired	$35.16
Weighted-Average Exercise Price Per Share, Outstanding - April 4, 2014	$8.92
Weighted-Average Exercise Price Per Share, Options vested and expected to vest as of April 4, 2014	$8.92
Weighted-Average Exercise Price Per Share, Options vested and exercisable as of April 4, 2014	$9.29
Weighted-Average Remaining Contractual Term (in years), Outstanding - September 27, 2013	'6 years 2 months 12 days
Weighted-Average Remaining Contractual Term (in years), Outstanding - April 4, 2014	'4 years 9 months 18 days
Weighted-Average Remaining Contractual Term (in years), Options vested and expected to vest as of April 4, 2014	'4 years 9 months 18 days
Weighted-Average Remaining Contractual Term (in years), Options vested and exercisable as of April 4, 2014	'4 years 8 months 12 days
Aggregate Intrinsic Value, Outstanding - September 27, 2013	$13,131
Aggregate Intrinsic Value, Outstanding - April 4, 2014	11,223
Aggregate Intrinsic Value, Options vested and expected to vest as of April 4, 2014	11,223
Aggregate Intrinsic Value, Options vested and exercisable as of April 4, 2014	$9,956

ShareBased_Compensation_Summar1

Share-Based Compensation - Summary of Restricted Stock and Restricted Stock Units Activity (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of Shares, Unvested - September 27, 2013	1,129
Number of Shares, Assumed in Mindspeed Acquisition	285
Number of Shares, Granted	724
Number of Shares, Vested and released	-303
Number of Shares, Forfeited, canceled or expired	-107
Number of Shares, Issued and unvested - April 4, 2014	1,728
Number of Shares, Shares expected to vest - April 4, 2014	1,529
Weighted-Average Remaining Contractual Term (in years), Unvested - September 27, 2013	'2 years 10 months 24 days
Weighted-Average Remaining Contractual Term (in years), Issued and unvested - April 4, 2014	'2 years 9 months 18 days
Weighted-Average Remaining Contractual Term (in years), Shares expected to vest - April 4, 2014	'2 years 9 months 18 days
Aggregate Intrinsic Value, Unvested - September 27, 2013	$18,148
Aggregate Intrinsic Value, Issued and unvested - April 4, 2014	34,824
Aggregate Intrinsic Value, Shares expected to vest - April 4, 2014	$30,803

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Income Taxes [Line Items]	'	'	'	'
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Mindspeed [Member]	'	'	'	'
Income Taxes [Line Items]	'	'	'	'
Net operating loss carryforwards	683.7	'	683.7	'
Expiration beginning year for net operating loss carryforwards	'	'	'2033	'
Federal research and development tax credit carryforwards	19.5	'	19.5	'
Internal revenue	'	'	305.9	'
Estimated aggregate net deferred income tax assets acquire	85.7	'	85.7	'
Net deferred income tax liability	68.9	'	68.9	'
Valuation allowance	16.8	'	16.8	'
Nitronex LLC [Member]	'	'	'	'
Income Taxes [Line Items]	'	'	'	'
Increase to additional paid-in capital	6.2	'	6.2	'

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
Related Party Transactions [Abstract]	'	'	'	'
Minimum service requirements or payment obligations	$0	'	$0	'
Notice period to terminate agreement	'	'	'30 days	'
Other income-related party	$40,000	$86,000	$118,000	$170,000

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information - Additional Information (Detail) (USD $)	6 Months Ended
	Apr. 04, 2014	Mar. 29, 2013
Supplemental Cash Flow Elements [Abstract]	'	'
Unpaid amounts related to purchase of assets	$568,000	$1,000,000
Mindspeed [Member]	'	'
Supplemental Cash Flow Elements [Abstract]	'	'
Assumed indebtedness	39,800,000	'
Debt paid	$35,000,000	'

Geographic_and_Significant_Cus2

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013	Sep. 27, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'
Revenue by Geographic Region	$107,827	$78,843	$191,981	$154,919	'
Long-Lived Assets by Geographic Region	48,268	'	48,268	'	32,735
United States [Member]	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'
Revenue by Geographic Region	50,915	47,281	104,804	92,617	'
Long-Lived Assets by Geographic Region	40,962	'	40,962	'	26,226
International [Member]	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'
Revenue by Geographic Region	56,912	31,562	87,177	62,302	'
Long-Lived Assets by Geographic Region	$7,306	'	$7,306	'	$6,509

Geographic_and_Significant_Cus3

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Parenthetical) (Detail)	Apr. 04, 2014	Sep. 27, 2013
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%

Geographic_and_Significant_Cus4

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Total Sales and Accounts Receivable (Detail)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

Apr. 04, 2014

Mar. 29, 2013

Apr. 04, 2014

Mar. 29, 2013

Apr. 04, 2014

Mar. 29, 2013

Apr. 04, 2014

Mar. 29, 2013

Apr. 04, 2014

Sep. 27, 2013

Apr. 04, 2014

Mar. 29, 2013

Apr. 04, 2014

Mar. 29, 2013

Apr. 04, 2014

Sep. 27, 2013

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Customera [Member]

Customera [Member]

Customera [Member]

Customera [Member]

Customer B [Member]

Customer B [Member]

Customer B [Member]

Customer B [Member]

Customer B [Member]

Customer B [Member]

Customer A [Member]

Customer A [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue [Member]

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue

64.00%

61.00%

62.00%

61.00%

13.00%

15.00%

18.00%

15.00%

'

'

19.00%

25.00%

21.00%

25.00%

'

'

Accounts Receivable

'

'

'

'

'

'

'

'

18.00%

21.00%

'

'

'

'

17.00%

18.00%

Geographic_and_Significant_Cus5

Geographic and Significant Customer Information - Additional Information (Detail)	6 Months Ended		3 Months Ended		6 Months Ended
	Apr. 04, 2014	Sep. 27, 2013	Apr. 04, 2014	Mar. 29, 2013	Apr. 04, 2014	Mar. 29, 2013
	Customer		Revenue [Member]	Revenue [Member]	Revenue [Member]	Revenue [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'
Number of major customers	10	'	'	'	'	'
Total revenue from ten customers in percentage	'	'	64.00%	61.00%	62.00%	61.00%
Percentage of geographic segment long-lived assets threshold	10.00%	10.00%	'	'	'	'

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	0 Months Ended
In Millions, unless otherwise specified	8-May-14	Sep. 26, 2013	8-May-14
	Term Loans [Member]	Revolving Credit Facility [Member]	Revolving Credit Facility [Member]
	Subsequent Event [Member]		Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'
Revolving credit facility maturity date	31-May-21	30-Sep-18	31-May-19
Revolving credit facility maximum borrowing availability	$350	$300	$100
Term loans, issuance discount	0.75%	'	'
Quarterly principal repayment percentage	0.25%	'	'
Quarterly principal repayment start date	30-Sep-14	'	'
Revolving credit facility, amount drawn	$350	'	$0