MACOM Technology Solutions (MTSI) 10-Q 13 May 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Apr. 03, 2015	8-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	3-Apr-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	MTSI
Entity Registrant Name	M/A-COM Technology Solutions Holdings, Inc.
Entity Central Index Key	1493594
Current Fiscal Year End Date	-21
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		52,637,979

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Apr. 03, 2015	Oct. 03, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$73,970	$173,895
Accounts receivable, net	89,350	75,156
Inventories	84,077	73,572
Deferred income taxes	35,957	35,957
Prepaids and other current assets	25,386	14,769
Total current assets	308,740	373,349
Property and equipment, net	65,352	50,357
Goodwill	96,321	10,784
Intangible assets, net	261,579	142,633
Deferred income taxes	49,063	84,629
Other assets	19,194	20,482
TOTAL ASSETS	800,249	682,234
Current liabilities:
Current portion of lease	562
Current portion of long-term debt	3,500	3,478
Accounts payable	29,915	29,797
Accrued liabilities	33,033	34,248
Income taxes payable	896	865
Deferred revenue	267	17,258
Total current liabilities	68,173	85,646
Lease payable, less current portion	741
Long-term debt, less current portion	341,594	343,178
Warrant liability	32,018	15,801
Other long-term liabilities	8,028	9,042
Total liabilities	450,554	453,667
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock
Common stock	53	48
Additional paid-in capital	512,694	377,714
Treasury stock, at cost	-330	-330
Accumulated deficit	-161,354	-147,511
Accumulated other comprehensive loss	-1,368	-1,354
Total stockholders' equity	349,695	228,567
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$800,249	$682,234

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. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Income Statement [Abstract]
Revenue	$124,885	$107,827	$239,749	$191,981
Cost of revenue	70,878	80,964	131,541	129,396
Gross profit	54,007	26,863	108,208	62,585
Operating expenses:
Research and development	21,061	20,347	40,535	32,777
Selling, general and administrative	29,227	24,504	54,826	43,887
Restructuring charges	413	2,635	413	15,725
Total operating expenses	50,701	47,486	95,774	92,389
Income (loss) from operations	3,306	-20,623	12,434	-29,804
Other income (expense)
Warrant liability (expense) gain	-5,609	-4,066	-16,217	-2,784
Interest expense	-4,723	-1,622	-9,446	-2,208
Other income (expense)	-1,376	1,009	-1,001	1,087
Total other expense	-11,708	-4,679	-26,664	-3,905
Loss before income taxes	-8,402	-25,302	-14,230	-33,709
Income tax provision (benefit)	-865	-5,680	-387	-7,271
Loss from continuing operations	-7,537	-19,622	-13,843	-26,438
Loss from discontinued operations		-2,500		-4,605
Net loss	($7,537)	($22,122)	($13,843)	($31,043)
Basic loss per share:
Loss from continuing operations	($0.15)	($0.42)	($0.28)	($0.57)
Loss from discontinued operations		($0.05)		($0.10)
Loss per share - basic	($0.15)	($0.47)	($0.28)	($0.67)
Diluted loss per share:
Loss from continuing operations	($0.15)	($0.42)	($0.28)	($0.57)
Loss from discontinued operations		($0.05)		($0.10)
Loss per share - diluted	($0.15)	($0.47)	($0.28)	($0.67)
Shares used:
Basic	50,593	46,808	49,100	46,656
Diluted	50,593	46,808	49,100	46,656

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Amounts Reclassified Out Of Accumulated Other Comprehensive Income Loss [Abstract]
Net loss	($7,537)	($22,122)	($13,843)	($31,043)
Foreign currency translation loss	-221	-432	-14	-387
Total comprehensive loss	($7,758)	($22,554)	($13,857)	($31,430)

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 Oct. 03, 2014	$228,567	$48	($330)	($1,354)	$377,714	($147,511)
Balance, Shares at Oct. 03, 2014		47,548	23
Common stock issued, net of issuance costs	127,908	5			127,903
Common stock issued, net of issuance costs, shares		4,500
Stock options exercises	1,530				1,530
Stock options exercises, shares	174	174
Vesting of restricted common stock and units	0	0	0	0	0	0
Vesting of restricted common stock and unit, shares		407
Shares issued pursuant to employee stock purchase plan	1,343				1,343
Shares issued pursuant to employee stock purchase plan, shares		97
Minimum tax withholding payments for employee share-based awards	-4,924				-4,924
Minimum tax withholding payments for employee share-based awards, shares		-156
Share-based compensation	9,128				9,128
Other comprehensive income	581			581
Foreign currency translation	-595			-595
Net loss	-13,843					-13,843
Balance at Apr. 03, 2015	$349,695	$53	($330)	($1,368)	$512,694	($161,354)
Balance, Shares at Apr. 03, 2015		52,570	23

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	($13,843)	($31,043)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities (net of acquisition):
Warrant liability expense	16,217	2,784
Depreciation and amortization	24,872	15,951
Acquired inventory step-up amortization	4,037	18,053
Amortization of deferred financing costs	842	238
Impairment of minority equity investment	3,500
Deferred income taxes	-1,216	1,017
Loss on disposal of property and equipment	101	89
Share-based compensation	9,128	5,135
Change in operating assets and liabilities, net of effects from an acquisition:
Accounts receivable	-3,345	8,345
Inventories	3,358	-3,933
Prepaid expenses and other assets	5,145	-1,991
Accounts payable	-5,549	-8,480
Accrued and other liabilities	-9,864	759
Income taxes	-374	-16,420
Deferred revenue	-16,991	5,212
Net cash provided by (used in) operating activities	16,018	-4,284
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of a businesses, net	-222,955	-258,108
Purchases of property and equipment	-14,036	-5,994
Sale of business		8,627
Strategic investments	-250
Acquisition of intellectual property	-1,587	-4,096
Net cash provided by (used in) investing activities	-238,828	-259,571
CASH FLOWS FROM FINANCING ACTIVITIES:
Capital contributions		3,200
Payments on long-term debt	-1,750
Proceeds from stock offering, net of issuance costs	127,959
Proceeds from revolving credit facility	100,000	245,000
Payments on revolving credit facility	-100,000
Proceeds from stock option exercises and employee stock purchases	2,871	2,295
Payments on capital leases	-1,232
Repurchase of common stock	-4,924	-300
Excess tax benefits		1,331
Payment of assumed debt		-34,952
Other	-39	-68
Net cash provided by (used in) financing activities	122,885	216,506
NET CHANGE IN CASH AND CASH EQUIVALENTS	-99,925	-47,349
CASH AND CASH EQUIVALENTS - Beginning of period	173,895	110,488
CASH AND CASH EQUIVALENTS - End of period	73,970	63,139
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest	7,574	1,900
Cash paid for income taxes	$794	$4,138

Description_of_Business_Basis_

Description of Business, Basis of Presentation and Accounting	6 Months Ended
	Apr. 03, 2015
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 leading provider of high-performance analog semiconductor solutions that enable next-generation internet applications, the cloud connected apps economy, and the modern, networked battlefield across the radio frequency (RF), microwave and millimeterwave spectrum and photonic semiconductor products. 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 consolidated 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.
	Under the Jumpstart Our Business Startups Act (JOBS Act), the Company qualified as an emerging growth company. Accordingly, the Company 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. We expect to cease being an emerging growth company at the end of fiscal year 2015, which will, among other things, require us to fully comply with Section 404 of the Sarbanes-Oxley Act of 2002 including obtaining an auditor attestation of our internal controls.
	The Company’s fiscal year ends on the Friday closest to the last day of September. For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks. Fiscal year 2015 is 52 weeks in length and the three and six months ended April 3, 2015 include 13 and 26 weeks, respectively. Fiscal year 2014 was 53 weeks in length and the three and six months ended April 4, 2014 include 13 and 27 weeks, respectively. The accompanying condensed consolidated financial statements are referred to as “consolidated” for all periods presented.
	On December 15, 2014, MACOM completed the acquisition of BinOptics Corporation (BinOptics), a supplier of high-performance photonic products (BinOptics Acquisition). The BinOptics Acquisition was accounted for as a purchase and the operations of BinOptics have been included in MACOM’s condensed consolidated financial statements since December 15, 2014, the date of acquisition.
	MACOM acquired Nitronex, LLC (Nitronex) in 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. Prior to the Nitronex Acquisition, GaAs Labs was 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 consolidated financial statements for the three months and six months ended April 4, 2014, combine MACOM’s historical consolidated financial statements with the historical financial statements of Nitronex from January 3, 2014 through April 4, 2014 and September 28, 2013 through April 4, 2014, and have been presented in a manner similar to a pooling-of-interests to include the results of operations of each business since the date of common control.
	On December 18, 2013, MACOM completed the acquisition of Mindspeed Technologies, Inc. (Mindspeed), a supplier of high-performance analog semiconductor solutions for communications infrastructure applications (Mindspeed Acquisition). 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.
	These consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended October 3, 2014, filed with the SEC on December 9, 2014.
	In the opinion of management, the accompanying unaudited 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 2015.
	Principles of Consolidation—The accompanying consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Prior to the Nitronex Acquisition, MACOM and Nitronex did not have material intracompany transactions.
	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.
	Discontinued Operations—In the second quarter of fiscal year 2014, the Company sold assets of the non-core wireless business of Mindspeed and presented the divested businesses as assets held for sale as of the date of the Mindspeed Acquisition. The operating results of the business are reflected in discontinued operations.
	Foreign Currency Translation and Remeasurement—The Company’s consolidated financial statements are presented in U.S. dollars. While the majority of the Company’s foreign operations use the U.S. dollar as the functional currency, the financial statements of the Company’s foreign operations for which the functional currency is not the U.S. dollar are translated into U.S. dollars at the exchange rates in effect at the balance sheet dates (for assets and liabilities) and at average exchange rates (for revenue and expenses). The unrealized translation gains and losses on the net investment in these foreign operations are accumulated as a component of other comprehensive loss.
	The financial statements of the Company’s foreign operations where the functional currency is the U.S. dollar, but where the underlying transactions are transacted in a different currency, are re-measured at the exchange rate in effect at the balance sheet date with respect to monetary assets and liabilities. Nonmonetary assets and liabilities, such as inventories and property and equipment and related statements of operations accounts, such as cost of revenue and depreciation, are remeasured at historical exchange rates. Revenue and expenses, other than cost of revenue, amortization and depreciation, are translated at the average exchange rate for the period in which the transaction occurred. The net gains (losses) on foreign currency remeasurement are reflected in selling, general and administrative expense in the accompanying Condensed Consolidated Statements of Operations. The Company’s recognized net gains and losses on foreign exchange are included in selling, general and administrative expense and for all periods presented were immaterial.
	Revenue Recognition—The Company recognizes revenue when: (i) persuasive evidence of an arrangement exists; (ii) delivery or services have been rendered; (iii) the price is fixed or determinable; and (iv) collectability is reasonably assured. The Company recognizes revenue with the transfer of title and risk of loss and provides for reserves for returns and other allowances.
	The Company generally does not provide customers other than distributors the right to return product, with the exception of warranty related matters. Accordingly, the Company does not typically maintain a reserve for customers. Shipping and handling fees billed to customers are recorded as revenue while the related costs are classified as a component cost of revenue. The Company provides warranties for its products and accrues the cost of warranty claims in the period the related revenue is recorded.
	Prior to fiscal 2015, the Company had concluded that it had insufficient information as well as limited experience in estimating the effect of the right of distributors to return product and price protection and, accordingly, used the sell through approach of revenue recognition. Under this approach, the Company would recognize revenue from sales after the distributor resold the product to its end customer (the sell through basis). After concluding an extensive three year study of distributor related transactions, the Company completed an evaluation of its revenue recognition policy and concluded that it was more appropriate to recognize revenue to distributors at the time of shipment to the distributor (sell-in basis). The Company believes it now has sufficient data to predict future price adjustments from distributors and has a basis of being able to reasonably estimate these future price adjustments.
	On a consolidated basis, revenue from distribution customers impacted by the change in estimate accounts for approximately 10-15% of total consolidated revenue. Certain agreements with distribution customers provide for rights of return and compensation credits until such time as the Company’s products are sold by the distributors to their end customers. The Company has agreements with some distribution customers for various programs, including compensation, volume-based pricing, obsolete inventory, new products and stock rotation. Sales to these distribution customers, as well as the existence of compensation programs, are in accordance with terms set forth in written agreements with these distribution customers. In general, credits allowed under these programs are capped based upon individual distributor agreements. The Company records charges associated with these programs as a reduction of revenue at the time of sale with a corresponding adjustment to accounts receivables based upon historical activity. The Company’s policy is to use a twelve month rolling historical experience rate as well as an estimated general reserve percentage in order to estimate the necessary allowance to be recorded. The Company changed its revenue recognition policy from a sell through to a sell-in approach during the first fiscal quarter of 2015. The Company recognizes revenue when criteria for FASB ASC 605-15-25 are met.
	During the first fiscal quarter of 2015, the Company recorded corresponding adjustments related to this change in estimate to recognize previously deferred revenues. The net effect was an increase of $15.1 million, of which $12.4 million was from previously deferred revenue and $2.7 million was related to the change in distributor inventories. Additionally, the Company recognized the related deferred inventory costs of $4.7 million which resulted in a reduction to net loss of $8.5 million, or a reduction of $0.18 net loss per share when the change in estimate was recorded. During the three months ended April 3, 2015, this change in estimate resulted in revenue of $3.7 million and a reduction in net loss of $0.3 million, or $0.01 reduction of net loss per share, respectively. During the six months ended April 3, 2015, this change in estimate resulted in revenue of $18.8 million and a reduction in net loss of $8.8 million, or $0.18 reduction of net loss per share, respectively.
	The Company also established a new reserve of $5.5 million during the first quarter of fiscal year 2015 which was increased to $6.5 million for the quarter ended April 3, 2015 related to future rebates and returns under various programs associated with our distributor agreements. The amount of this reserve is largely driven by the individual distribution agreements and the Company’s business strategy whereby the Company will invoice the distributor at “list price”. The Company expects to issue compensation credits consistent with the distributor agreements. The difference between the list price and distributor selling price will vary by product grouping consistent with historical trends and marketing strategies. Historically, 90 percent of the credits issued to distributors are based on “list price” credits and 10 percent of the credits were for product returns and stock rotation rights, based upon the twelve month rolling historical experience rate.
	The table below shows the changes in gross and net distributor revenue and reserve balances associated with the change in estimate for the three and six months ended April 3, 2015:
			Three Months Ended						Six Months Ended
			January 2,			April 3,			April 3, 2015
			2015			2015
	Gross revenue effect of one-time change in estimate (1)		$	17			—		$	17
	Gross revenue effect associated with change in estimate (2)			3.6			4.7			8.3
	Total gross revenue resulting from change in estimate		$	20.6		$	4.7		$	25.3
	Net revenue effect of one-time change in estimate (3)		$	12.4			—			12.4
	Net revenue effect associated with change in estimate (4)			2.7			3.7			6.4
	Total net revenue resulting from change in estimate		$	15.1		$	3.7		$	18.8
	Reserve for future returns and credits (5)		($	5.5	)	($	1	)	($	6.5	)
	-1	This amount was recorded as deferred revenue as of October 3, 2014.
	-2	This amount represents the gross revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.
	-3	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.
	-4	This amount represents the net revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.
	-5	This amount reflects the change in the revenue reserve for future returns and credits. The balance as of April 3, 2015 is $6.5 million.
	Recent Accounting Standards—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.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in the ASU can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. The Company is currently evaluating the impact of ASU 2014-09, which is effective for the Company in our fiscal year beginning on September 30, 2017.
	In June 2014, the FASB issued ASU 2014-12—Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (a consensus of the FASB Emerging Issues Task Force) which addresses how to account for share-based performance awards including determining rendering service on the date the performance target is achieved. The Company is currently evaluating the impact of ASU 2014-12, which is effective for annual periods and interim periods within those annual periods, beginning after December 15, 2015.
	In February 2015, the FASB issued ASU 2015-02, Consolidation: Amendments to the Consolidation Analysis. ASU 2015-02 address concerns regarding the current accounting for consolidation of certain legal entities. A reporting entity may apply the amendments in this Update using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply the amendments retrospectively. The Company is currently evaluating the impact of ASU 2015-02, which is effective for the Company in our fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015.
	In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company is currently evaluating the impact of ASU 2015-03, which is effective for the Company in our fiscal years beginning after December 15, 2015, and interim periods within those fiscal years.

Acquisitions

Acquisitions	6 Months Ended
	Apr. 03, 2015
Business Combinations [Abstract]
Acquisitions	2. ACQUISITIONS
	Acquisition of BinOptics Corporation—On November 17, 2014, MACOM entered into an Agreement and Plan of Merger with BinOptics, a supplier of high-performance photonic semiconductor products. On December 15, 2014, MACOM completed the BinOptics Acquisition. In accordance with the Agreement and Plan of Merger, all of the outstanding equity interests (including outstanding warrants) of BinOptics were exchanged for aggregate consideration of approximately $224.0 million in cash, subject to customary purchase price adjustments. The Company funded the BinOptics Acquisition with a combination of cash on hand and the incurrence of $100.0 million of additional borrowings under its existing Revolving Facility. For the six months ended April 3, 2015, the Company recorded transaction costs of $4.1 million related to the BinOptics Acquisition.
	The BinOptics Acquisition was accounted for as a purchase and the operations of BinOptics have been included in MACOM’s consolidated financial statements since the date of acquisition.
	MACOM is recognizing BinOptics’ assets acquired and liabilities assumed based upon the fair value of such assets and liabilities measured as of the date of acquisition. The aggregate purchase price for BinOptics is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess of the purchase price over the fair value of the acquired net assets represents cost and revenue synergies specific to the Company, as well as non-capitalizable intangible assets, such as the employee workforce acquired, and has been allocated to goodwill, none of which is tax deductible.
	The Company expects to finalize its allocation of purchase price during fiscal year 2015. The preliminary allocation of purchase price as of April 3, 2015, is as follows (in thousands):
		Original			Allocation			April 3, 2015
		Allocation			Adjustments			Adjusted
								Allocation
	Current assets	$	41,836		$	—		$	41,836
	Intangible assets		135,254			(1,054	)		134,200
	Other assets		14,090			—			14,090
	Total assets acquired		191,180			(1,054	)		190,126
	Liabilities assumed:
	Debt		1,491			—			1,491
	Deferred income taxes		37,745			(382	)		37,363
	Other liabilities		12,810			—			12,810
	Total liabilities assumed		52,046			(382	)		51,664
	Net assets acquired		139,134			(672	)		138,462
	Consideration:
	Cash paid upon closing, net of cash acquired		224,114			(115	)		223,999
	Goodwill	$	84,980		$	557		$	85,537
	The components of the acquired intangible assets on a preliminary basis were as follows (in thousands):
		Amount			Useful Lives
					(Years)
	Developed technology	$	16,900		7
	Customer relationships		117,300		10
		$	134,200
	The overall weighted-average life of the identified intangible assets acquired in the BinOptics Acquisition is estimated to be 9.6 years and the assets are being amortized over their estimated useful lives based upon the pattern over which 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 3, 2015, and for the interim periods then ended.
	The following is a summary of BinOptics revenue and earnings included in MACOM’s accompanying condensed consolidated statements of operations for the three and six months ended April 3, 2015 (in thousands):
		Three Months Ended			Six Months Ended
		April 3, 2015			April 3, 2015
	Revenue	$	17,079		$	19,207
	Loss before income taxes		(4,056	)		(5,435	)
	Unaudited Supplemental Pro Forma Data—The pro forma statements of operations data for the three and six months ended April 3, 2015 and April 4, 2014, below, give effect to the BinOptics Acquisition, described above, as if it had occurred at September 27, 2013. These amounts have been calculated after applying MACOM’s accounting policies and adjusting the results of BinOptics 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 27, 2013. The supplemental pro forma earnings for the three and six months ended April 3, 2015 and April 4, 2014 were adjusted to exclude discontinued operations. 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.
		Three Months Ended						Six Months Ended
		April 3, 2015			April 4, 2014			April 3, 2015			April 4, 2014
	Revenue	$	124,885		$	118,435		$	251,616		$	209,199
	Net loss		(4,093	)		(27,045	)		(10,831	)		(38,925	)
	The table above represents proforma net loss which differs from the actual results due to adjustments related to inventory step-up, intangible amortization expense which were reflected in fiscal 2014.
	Acquisition under Common Control—On February 13, 2014, MACOM acquired Nitronex, an entity under common control, through a cash payment of $26.1 million for all of the outstanding ownership interests of Nitronex. MACOM funded the Nitronex Acquisition through the use of available cash and borrowings under its revolving credit facility. The purchase price includes $3.9 million held on account by a third-party escrow agent pending any claims by MACOM in connection with general representation matters made by GaAs Labs in the transaction. The indemnification period expires in August 2015, at which point if no claims are made, all amounts will be paid to GaAs Labs.
	Acquisition of Mindspeed Technologies, Inc.—On December 18, 2013, MACOM completed the acquisition of Mindspeed, a supplier of semiconductor solutions for communications infrastructure applications. The Company 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. The aggregate purchase price for the Shares, net of cash acquired, was $232.0 million and MACOM assumed $81.3 million of liabilities and incurred costs of $4.5 million that was expensed during fiscal year 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 the date of acquisition.
	MACOM recognized 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 was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess of the purchase price over the fair value of the acquired net assets represents cost and revenue synergies specific to the Company, as well as non-capitalizable intangible assets, such as the employee workforce acquired, and has been allocated to goodwill, none of which is tax deductible.
	The Company finalized the purchase price allocation of the Mindspeed Acquisition during the three months ended January 2, 2015. The final allocation of purchase price is as follows:
		Amount
	Current assets	$	50,612
	Intangible assets		138,663
	Deferred income taxes		92,881
	Other assets		31,788
	Total assets acquired		313,944
	Liabilities assumed:
	Current liabilities		35,270
	Debt		40,177
	Other liabilities		5,865
	Total liabilities assumed		81,312
	Net assets acquired		232,632
	Consideration:
	Cash paid upon closing, net of cash acquired		232,028
	Fair value of vested awards assumed in acquisition		785
	Total consideration		232,813
	Goodwill	$	181
	In connection with the Mindspeed Acquisition, MACOM assumed all of the outstanding options and 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 $4.1 million, of which $0.8 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 were as follows (in thousands):
	Amount			Useful Lives
				(Years)
Developed technology	$	109,263		7
Customer relationships		11,430		10
In-process research and development		17,970		N/A
	$	138,663
The overall weighted-average life of the identified intangible assets acquired in the acquisition is estimated to be 7.3 years.
The following is a summary of Mindspeed’s revenue and earnings included in MACOM’s accompanying condensed consolidated statements of operations for the six months ended April 4, 2014 (in thousands):
	Six Months Ended
	April 4, 2014
Revenue	$	33,809
Income from continuing operations before income taxes and restructuring charges		(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 through the date of sale. The Company completed the sale of the wireless business in February 2014. The accompanying consolidated statement of operations for the three and six months ended April 3, 2015 and April 4, 2014, includes the following operating results related to the divested wireless business (in thousands):
	Three Months Ended			Six Months Ended
	April 4, 2014			April 4, 2014
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		(2,500	)		(4,605	)
Unaudited Supplemental Pro Forma Data—The pro forma statements of operations data for the six months ended April 3, 2015 below, give effect to the Mindspeed Acquisition, described above, as if it had occurred at September 27, 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 27, 2013. The supplemental pro forma earnings for the six months ended April 4, 2014 were adjusted to exclude discontinued operations as well as certain other non-recurring items. 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.
	Six Months
	Ended
	April 4, 2014
Revenue	$	211,437
Net loss		(35,812	)
Other Acquisitions—In the fiscal fourth quarter of 2014, we acquired two businesses, I.K.E., Incorporated (IKE Micro) and Photonic Controls, LLC (Photonic Controls), for total cash consideration of $2.8 million. IKE Micro is a specialized build-to-print house based in Nashua, New Hampshire. The primary purpose of the IKE Micro acquisition is to drive manufacturing cost reductions and further improve gross profit in the Company’s Optoelectronics business. Photonic Controls is a small design company based in Horseheads, New York, which specializes in photonic semiconductor development and system design. Its primary focus is to design silicon photonic chips for 100G/400G optical networks.
The assets acquired and liabilities assumed were recorded at their fair values and operating results were included in the financial statements from the date of acquisition. The preliminary purchase price allocation resulted in goodwill of $3.9 million and intangible assets, including manufacturing know-how and customer relationships, of $1.6 million recorded on the date of acquisition, which will be amortized over 7-10 years. Additionally, the Company recorded a contingent consideration liability of $0.8 million related to the acquisition of Photonic Controls which is included in other long-term liabilities in the accompanying Condensed Consolidated Balance Sheet as of October 3, 2014. The maximum possible payment of contingent purchase price is $1.5 million. Approximately $1.7 million of the goodwill resulting from these acquisitions is deductible for tax purposes. The purchase price allocation will be finalized in fiscal 2015 upon receipt of final information related to valuation of intangibles, and no allocation adjustments were recorded in the six months ended April 3, 2015. The acquisitions were not material to the Company’s consolidated financial statements.
Investments—The Company determines the appropriate classification of its investments at the time of acquisition and re-evaluates such determination at each balance sheet date. The Company records at cost non-marketable equity investments where it does not have the ability to exercise significant influence or control and periodically reviews such investments for impairment.
During fiscal years 2014 and 2015, the Company made a minority investment of $0.3 million and $0.2 million in the convertible debt of a privately-held U.S. based company. The Company classified this investment as trading securities. (See Note 3).
During fiscal year 2014, the Company made a minority investment of $5.0 million in the equity of a privately-held U.S. based company. This minority equity investment is accounted for under the cost method due to ownership less than 20% and lack of significant influence and is included on the condensed consolidated balance sheets in other long-term assets. Additionally, the Company determined that the equity investment contained embedded derivatives. The accounting treatment of derivative financial instruments requires that the Company record the fair value of the derivatives as of the inception date of the equity investment and to adjust the fair value as of each subsequent balance sheet date. As of April 3, 2015, the Company determined the embedded derivatives had no value, consistent with prior periods and the inception date.
On May 11, 2015, the U.S. based company in which we held a minority investment was sold to a third party. Based on this new information the Company recorded an impairment charge of $3.5 million in other expense in the Condensed Consolidated Statement of Operations for the three and six months ended April 3, 2015. The carrying value of this investment was determined to be $1.5 million as of April 3, 2015, which represents the estimated net proceeds due to the Company from the sale.

Financial_Instruments

Financial Instruments	6 Months Ended
	Apr. 03, 2015
Fair Value Disclosures [Abstract]
Financial Instruments	3. FINANCIAL INSTRUMENTS
	Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):
		April 3, 2015
		Fair		Active		Observable		Unobservable
		Value		Markets		Inputs		Inputs
				for		(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Assets
	Trading securities	$	500	$	—	$	—	$	500
	Total assets measured at fair value	$	500	$	—	$	—	$	500
	Liabilities
	Contingent consideration	$	820	$	—	$	—	$	820
	Common stock warrant liability		32,018		—		—		32,018
	Total liabilities measured at fair value	$	32,838	$	—	$	—	$	32,838
		October 3, 2014
		Fair		Active		Observable		Unobservable
		Value		Markets		Inputs		Inputs
				for		(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Assets
	Trading securities	$	250	$	—	$	—	$	250
	Total assets measured at fair value	$	250	$	—	$	—	$	250
	Liabilities
	Contingent consideration	$	820	$	—	$	—	$	820
	Common stock warrant liability		15,801		—		—		15,801
	Total liabilities measured at fair value	$	16,621	$	—	$	—	$	16,621
	The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):
		Three Months Ended April 3, 2015
		January 2,		Net Realized/		Purchases		Sales and		Transfers in		April 3,
		2015		Unrealized		and		Settlements		and/or (out)		2015
				Losses (Gains)		Issuances				of Level 3
				Included in
				Earnings
	Trading securities	$	250	$	—	$	250	$	—	$	—	$	500
	Contingent consideration	$	820	$	—	$	—	$	—	$	—	$	820
	Common stock warrant liability	$	26,409	$	5,609	$	—	$	—	$	—	$	32,018
		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
	Common stock warrant liability	$	10,591	$	4,066	$	—	$	—	$	—	$	14,657
		Six Months Ended April 3, 2015
		October 3,		Net Realized/		Purchases		Sales and		Transfers in		April 3,
		2014		Unrealized		and		Settlements		and/or (out)		2015
				Losses (Gains)		Issuances				of Level 3
				Included in
				Earnings
	Trading securities	$	250	$	—	$	250	$	—	$	—	$	500
	Contingent consideration	$	820	$	—	$	—	$	—	$	—	$	820
	Common stock warrant liability	$	15,801	$	16,217	$	—	$	—	$	—	$	32,018
		Six Months Ended April 4, 2014
		September 27,		Net Realized/		Purchases		Sales and		Transfers in		April 4,
		2013		Unrealized		and		Settlements		and/or (out)		2014
				Losses (Gains)		Issuances				of Level 3
				Included in
				Earnings
	Common stock warrant liability	$	11,873	$	2,784	$	—	$	—	$	—	$	14,657
	As of April 3, 2015, the fair value of the securities have been estimated to approximate cost. 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 financial instruments. Any changes in the estimated fair values of the financial instruments in the future will be reflected in the Company’s earnings and such changes could be material.
The fair values of the contingent consideration liabilities were estimated based upon a risk-adjusted present value of the probability-weighted expected payments by the Company. Specifically, the Company considered base, upside and downside scenarios for the operating metrics upon which the contingent payments are to be based. Probabilities were assigned to each scenario and the probability-weighted payments were discounted to present value using risk-adjusted discount rates. The maximum possible payment of contingent consideration is $1.5 million.
As of April 3, 2015, the fair value of the 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 5.7 years, expected volatility of 37.4% and risk free rate of 1.7%. Any significant change in these assumptions could have an impact on the value of the stock warrants.

Inventories

Inventories	6 Months Ended
	Apr. 03, 2015
Inventory Disclosure [Abstract]
Inventories	4. INVENTORIES
	Inventories consist of the following (in thousands):
		April 3,		October 3,
		2015		2014
	Raw materials	$	47,137	$	34,919
	Work-in-process		4,554		5,500
	Finished goods		32,386		33,153
	Total	$	84,077	$	73,572

Property_and_Equipment

Property and Equipment	6 Months Ended
	Apr. 03, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	5. PROPERTY AND EQUIPMENT
	Property and equipment consists of the following (in thousands):
		April 3,			October 3,
		2015			2014
	Machinery and equipment	$	78,774		$	68,438
	Leasehold improvements		9,183			7,998
	Furniture and fixtures		1,001			1,017
	Construction in process		24,126			12,918
	Computer equipment and software		8,133			7,758
	Total property and equipment		121,217			98,129
	Less accumulated depreciation and amortization		(55,865	)		(47,772	)
	Property and equipment, net	$	65,352		$	50,357
	Depreciation and amortization expense related to property and equipment for the three and six months ended April 3, 2015 was $4.2 million and $8.0 million, respectively. 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.

Debt

Debt	6 Months Ended
	Apr. 03, 2015
Debt Disclosure [Abstract]
Debt	6. DEBT
	On September 26, 2013, and as amended November 5, 2013, the Company entered into an amended and restated loan agreement with a syndicate of lenders, which provided for a revolving credit facility of up to $300.0 million that was due to mature in September 2018 (Prior Facility). Borrowings under the revolving credit facility either bore a variable interest rate based on either the lender’s prime rate or a LIBOR rate, plus an applicable margin. The revolving credit facility was secured by a first priority lien on substantially all of the Company’s assets and required compliance with certain financial and non-financial covenants. In connection with the Mindspeed and Nitronex acquisitions, MACOM borrowed an aggregate of $245.0 million of indebtedness on its Prior Facility.
	On May 8, 2014, the Company refinanced its outstanding indebtedness under the Prior 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 the Prior Facility and repaid the outstanding $245.0 million principal and interest due through draws on the Credit Agreement. Upon terminating the Prior Facility, previously deferred financing costs pertaining to that facility of $2.1 million were expensed as additional interest.
	The Credit Agreement provides for term loans in an aggregate principal amount of $350.0 million, which mature in May 2021 (Term Loans) and a revolving credit facility of up to $100.0 million, which matures in May 2019 (Revolving Facility). In February 2015, the Company executed an amendment with Goldman Sachs Bank USA that increased the Company’s aggregate borrowing capacity under the Revolving Facility to $130.0 million. The Term Loans were issued with an original issue discount of 0.75%, which is being amortized over the term of the Term Loans using the straight-line method, which approximates the effective interest rate method. Borrowings under the Term Loans bear interest (payable quarterly) at: (i) for LIBOR loans, a rate per annum equal to the LIBOR rate (subject to a floor of 0.75%), plus an applicable margin of 3.75%, and (ii) for base rate loans, a rate per annum equal to the prime rate (subject to a floor of 1.75%), plus an applicable margin of 2.75%. Borrowings under the Revolving Facility bear interest (payable quarterly) at: (i) for LIBOR loans, a rate per annum equal to the LIBOR rate, plus an applicable margin in the range of 2.00% to 2.50% (based on the Company’s total net leverage ratio being within certain defined ranges); and (ii) for base rate loans, a rate per annum equal to the prime rate, plus an applicable margin in the range of 1.00% to 1.50% (based on the Company’s total net leverage ratio being within certain defined ranges). The Company also pays a quarterly unused line fee for the Revolving Facility in the range of 0.25% to 0.375% (based on the Company’s total net leverage ratio being within certain defined ranges) as well as overall agency fees. MACOM borrowed $100.0 million of indebtedness on its Revolving Facility in connection with the BinOptics Acquisition, which was paid down in full using net proceeds from a public offering of common stock the Company completed in February 2015. The Company has $130.0 million of borrowing capacity under the Revolving Facility as of April 3, 2015. In addition, under certain conditions, the Company can add up to $75.0 million to its Term Loans through November 2015.
	The Term Loans are payable in quarterly principal installments equal to 0.25% of the aggregate dollar amount of all Term Loans outstanding at the signing of the Credit Agreement, with the remainder due on the maturity date.
	At the signing of the Credit Agreement, the entire $350.0 million principal amount of the Term Loans was funded. The Term Loans and Revolving Facility are secured by a first priority lien on substantially all of the Company’s assets and provide that the Company must comply with certain financial and non-financial covenants. The Company was in compliance with all such covenants under the Credit Agreement as of April 3, 2015. The Company incurred $8.7 million in fees for the issuance of the Credit Agreement which were recorded as deferred financing costs and are being amortized over the life of Credit Agreement as interest expense. As of April 3, 2015, approximately $7.5 million of deferred financing costs remain unamortized.
	As of April 3, 2015, the following remained outstanding on the Term Loans:
	Principal balance	$	347,375
	Unamortized discount		(2,281	)
			345,094
	Current portion		3,500
	Long-term, less current portion	$	341,594
	As of April 3, 2015, the minimum principal payments under the Term Loans in future fiscal years was as follows (in thousands):
	2015 (rest of fiscal year)	$	1,750
	2016		3,500
	2017		3,500
	2018		3,500
	2019		3,500
	Thereafter		331,625
	Total	$	347,375
	The fair value of the Term Loans was estimated to be approximately $350.4 million as of April 3, 2015 and was determined using Level 3 inputs, including a quoted rate from a bank.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	6 Months Ended
	Apr. 03, 2015
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 3,			April 4,			April 3,		April 4,
		2015			2014			2015		2014
	Cost of revenue	$	7,347		$	6,504		$	12,706	$	8,022
	Selling, general and administrative		3,096			484			4,149		869
	Total	$	10,443		$	6,988		$	16,855	$	8,891
	Intangible assets consist of the following (in thousands):
		April 3,			October 3,
		2015			2014
	Acquired technology	$	160,234		$	131,953
	Customer relationships		141,970			24,670
	In-process research and development		8,190			17,970
	Trade name		3,400			3,400
	Total		313,794			177,993
	Less accumulated amortization		(52,215	)		(35,360	)
	Intangible assets — net	$	261,579		$	142,633
	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 October 3, 2014	$	188,777		$	131,953		$	24,670	$	17,970		$	3,400	$	10,784
	BinOptics Acquisition		219,737			16,900			117,300		—			—		85,537
	Transfer to in service					9,780			—		(9,780	)		—		—
	Other intangibles purchased		1,601			1,601			—		—			—		—
	Balance at April 3, 2015	$	410,115		$	160,234		$	141,970	$	8,190		$	3,400	$	96,321
	As of April 3, 2015, estimated amortization of the intangible assets in future fiscal years, subject to the completion of the purchase price allocation for the BinOptics Acquisition, was as follows (in thousands):
		2015 (rest of			2016			2017		2018			2019		Thereafter		Total
		fiscal year)
	Amortization expense	$	20,666			35,064			35,388		34,011			32,277		92,584	$	249,990
	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 $39.4 million and $12.8 million, respectively, as of April 3, 2015, and $17.6 million and $6.7 million, respectively, as of April 4, 2014.
	In July 2013, the Company entered into a long term technology licensing and transfer agreement that calls for potential payments by the Company of up to $9.0 million through July 2016, based upon the achievement of specified milestones. Costs incurred in connection with the licensing and the transfer of the technology aggregated $7.7 million and $5.0 million as of April 3, 2015 and April 4, 2014, respectively, and were capitalized as incurred as acquired technology. Costs will be amortized to cost of revenue upon completion of the transfer, which is currently expected to be completed in fiscal year 2016.

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Apr. 03, 2015
Equity [Abstract]
Stockholders' Equity	8. STOCKHOLDERS’ 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 3, 2015.
	The outstanding shares of Company common stock as of April 3, 2015 and October 3, 2014, presented in the accompanying consolidated statements of stockholders’ equity exclude 43,000 and 59,000 unvested shares of restricted common stock, respectively, issued as compensation to employees that remained subject to forfeiture.

Loss_Per_Share

Loss Per Share	6 Months Ended
	Apr. 03, 2015
Earnings Per Share [Abstract]
Loss Per Share	9. LOSS PER SHARE
	Basic net 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 loss per share of common stock (in thousands, except per share data):
		Three Months Ended						Six Months Ended
		April 3,			April 4,			April 3,			April 4,
		2015			2014			2015			2014
	Numerator:
	Net loss	$	(7,537	)	$	(22,122	)	$	(13,843	)	$	(31,043	)
	Denominator:
	Weighted average common shares outstanding-basic		50,593			46,808			49,100			46,656
	Dilutive effect of options, restricted stock and warrants		—			—			—			—
	Weighted average common shares outstanding-diluted		50,593			46,808			49,100			46,656
	Common stock loss per share:
	Basic	$	(0.15	)	$	(0.47	)	$	(0.28	)	$	(0.67	)
	Diluted	$	(0.15	)	$	(0.47	)	$	(0.28	)	$	(0.67	)
	The table above excludes the effects of 1,908 and 1,406 shares for the three months and 1,815 and 1,412 shares for the six months ended April 3, 2015 and April 4, 2014, respectively, of potential shares of common stock issuable upon exercise of stock options, restricted stock and stock units, and warrants as the inclusion would be antidilutive.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Apr. 03, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	10. COMMITMENTS AND CONTINGENCIES
	Purchase Commitments—As of April 3, 2015 and October 3, 2014, the Company had outstanding non-cancelable purchase commitments aggregating $8.0 million and $5.2 million respectively, pursuant to inventory supply arrangements.
	Litigation—The Company is periodically subject to legal proceedings, claims and contingencies arising in the ordinary course of business. As of April 3, 2015, there was no other pending material litigation except as set forth below.
	Patent Suit Against Laird. The Company brought a patent infringement suit against Laird Technologies, Inc. (Laird) in the Federal District Court for the District of Delaware on February 11, 2014, seeking monetary damages and a permanent injunction. The suit alleged that Laird infringed on the Company’s United States Patent No. 6,272,349 (‘349 Patent), titled “Integrated Global Positioning System Receiver,” by making, using, selling, offering to sell or selling products incorporating an integrated global positioning receiver that include structure(s) recited in the ‘349 Patent, including global positioning system modules for automotive industry customers. The court entered a preliminary injunction against Laird on June 13, 2014. On April 15, 2015, the parties reached a confidential settlement agreement, filed a stipulated permanent injunction with the court that is similar in scope to the preliminary injunction, and filed a stipulated dismissal of all claims. The permanent injunction and dismissal were entered on April 21, 2015 by the court.
	Class Action Suit Against Mindspeed Technologies, Inc. On March 10, 2015, Philip Alvarez, a former employee of Mindspeed filed a putative class action lawsuit against Mindspeed in the Superior Court of California for the County of Orange. The lawsuit alleges, among other things, that Mr. Alvarez and certain other employees who designed and manufactured hardware systems for Mindspeed between March 11, 2011 and the present were misclassified as exempt employees under California law. The lawsuit seeks recovery of alleged unpaid overtime wages, meal and rest period premiums, penalties and attorneys’ fees. The Company disputes the allegations of the lawsuit. The lawsuit is currently in the early stages of litigation. The Company intends to defend the lawsuit vigorously.
	With respect to the above and other legal proceedings, the Company has not been able to reasonably estimate the amount or range of any possible loss, and accordingly has not accrued or disclosed any related amounts of possible loss in the accompanying consolidated financial statements.

Restructurings

Restructurings	6 Months Ended
	Apr. 03, 2015
Restructuring and Related Activities [Abstract]
Restructurings	11. RESTRUCTURINGS
	The Company has periodically implemented restructuring actions in connection with broader plans to reduce staffing and, generally, reduce operating costs. The restructuring expenses are comprised of direct and incremental costs related to headcount reductions including change-in-control obligations, severance and outplacement fees for the terminated employees.
	The following is a summary of the costs incurred and remaining balances included in accrued expenses primarily related to restructuring actions taken in conjunction with the Mindspeed Acquisition (in thousands):
	Balance as of October 3, 2014	$	801
	Current period adjustments		413
	Payments		(908	)
	Balance as of April 3, 2015	$	306
	The restructuring actions taken in fiscal year 2014 were paid through the first six months of fiscal year 2015, and the remaining amount is expected to be paid through the remainder of fiscal year 2015. The Company’s restructuring charges are primarily employee related with non-employee related charges determined to be immaterial.

ShareBased_Compensation

Share-Based Compensation	6 Months Ended
	Apr. 03, 2015
Disclosure of Compensation Related Costs, Share-based 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 3,			April 4,		April 3,		April 4,
		2015			2014		2015		2014
	Cost of revenue	$	549		$	426	$	895	$	709
	Research and development		1,165			728		2,127		1,212
	Selling, general and administrative		4,255			2,136		6,106		3,214
	Total stock-based compensation expense	$	5,969		$	3,290	$	9,128	$	5,135
	The Company has the following equity incentive plans: the Amended and Restated 2009 Stock Incentive Plan (2009 Plan), the 2012 Omnibus Incentive Plan (2012 Plan), the 2012 Employee Stock Purchase Plan (ESPP), the Mindspeed Technologies, Inc. 2013 Equity Incentive Plan (Mindspeed 2013 Plan), the Mindspeed Technologies, Inc. 2003 Long-Term Incentives Plan (Mindspeed 2003 Plan) and the Mindspeed Technologies, Inc. Directors Stock Plan (Mindspeed Directors Plan).
	Upon the closing of the IPO, all shares that were reserved under the 2009 Plan but not awarded were assumed by the 2012 Plan. No additional awards will be made under the 2009 Plan. Under the 2012 Plan, the Company has the ability to issue incentive stock options (ISOs), non-statutory stock options (NSOs), stock appreciation rights, restricted stock, restricted stock units (RSUs), performance units, performance shares and other equity-based awards to employees, directors and outside consultants. The ISOs and NSOs must be granted at a price per share not less than the fair value of our common stock on the date of grant. Options granted to date generally vest over a four-year period with 25% vesting at the end of one year and the remaining vest monthly thereafter. Certain of the share-based awards granted and outstanding as of April 3, 2015, are subject to accelerated vesting upon a sale of the Company or similar changes in control. Options granted generally are exercisable up to 10 years. In fiscal year 2012, the Company began granting RSUs, which generally vest annually over one to five years. As of April 3, 2015, the Company had 9.4 million shares available for future grants under the 2012 Plan.
	The Mindspeed 2013 Plan, the Mindspeed 2003 Plan, the Mindspeed Directors Plan and certain inducement equity grants (collectively, the Mindspeed Plans) were assumed by the Company in connection with the Mindspeed Acquisition. No additional equity awards will be made under the Mindspeed Plans.
	A summary of stock option activity for the six months ended April 3, 2015, 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-October 3, 2014		948		$	11.73		6.6	$	10,015
	Granted
	Exercised		(174	)		8.91
	Forfeited, canceled or expired		(14	)		22.62
	Outstanding-April 3, 2015		760		$	12.18		6.5	$	18,747
	Options vested and expected to vest as of April 3, 2015		760		$	12.18		6.5	$	18,747
	Options vested and exercisable as of April 3, 2015		760		$	12.17		6.5	$	18,741
	Aggregate intrinsic value represents the difference between the Company’s closing stock price on April 3, 2015 and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $4.0 million for the six months ended April 3, 2015.
	In April 2014, the Company granted stock options as to 405,000 shares of common stock with a grant date fair value of $3.5 million that are subject to vesting only upon the market price of the Company’s underlying public stock closing above a certain price target within ten years of the grant date. Due to the market condition upon which vesting is based, the fair value of the awards was estimated using a Monte Carlo simulation model. Compensation cost is recognized regardless of the number of awards that are earned based on the market condition. Compensation cost is recognized on a straight-line basis over the estimated service period of three years. In the event that the Company’s common stock achieves the target price of $32.55 per share prior to the end of the estimated service period, any remaining unamortized compensation cost will be recognized. These options are included in the table and other information above.
	On January 23, 2015, the Company’s common stock closed at a price of $34.79 per share, exceeding the target price of $32.55 per share, which resulted in the recognition of approximately $2.5 million of compensation expense in the current quarter. Accordingly, as of April 3, 2015, the majority of unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options was recognized during the quarter.
	A summary of restricted stock and restricted stock unit activity for the six months ended April 3, 2015, is as follows (in thousands):
		Number of			Weighted-		Aggregate
		Shares			Average		Intrinsic
					Remaining		Value
					Contractual
					Term
					(in years)
	Unvested-October 3, 2014		1,720			2.6	$	37,203
	Granted		510
	Vested and released		(407	)
	Forfeited, canceled or expired		(46	)
	Issued and unvested-April 3, 2015		1,777			1.6	$	63,708
	Shares expected to vest-April 3, 2015		1,501			1.5	$	55,076
	The total fair value of restricted stock awards vesting was $13.1 million for the six months ended April 3, 2015. As of April 3, 2015, total unrecognized compensation cost, adjusted for estimated forfeitures, related to restricted stock and units was $28.9 million, which is expected to be recognized over the next 3.9 years.
	As of April 3, 2015, total unrecognized compensation cost related to the ESPP was not material.
	Certain of the share-based awards granted and outstanding as of April 3, 2015, are subject to accelerated vesting upon a sale of the Company or similar changes in control. The financial impact of any modifications to share-based awards during the periods presented was immaterial.

Income_Taxes

Income Taxes	6 Months Ended
	Apr. 03, 2015
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 3, 2015 and April 4, 2014, was primarily impacted in all periods by changes in fair values of the common stock warrant liability which is neither deductible nor taxable for tax purposes, income taxed in foreign jurisdictions at generally lower tax rates and non-deductible compensation, offset by U.S. state income taxes. For the six months ended April 3, 2015, the rate was also impacted by non-deductible merger expenses resulting from the BinOptics Acquisition.
	The balance of the unrecognized tax benefit as of April 3, 2015 and October 3, 2014 was $1.7 million and includes a $1.4 million reduction in current deferred tax assets and a $0.3 million increase in other long-term liabilities in the accompanying consolidated balance sheets. The entire balance of unrecognized tax benefits, if recognized, will reduce income tax expense. It is the Company’s policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During the quarter ending April 3, 2015, the Company did not make any payment of tax-related interest and penalties. There was nothing accrued in the consolidated balance sheets for the payment of such interest and penalties at April 3, 2015 as the remaining unrecognized tax benefits would only serve to reduce the Company’s current federal and state NOL carryforwards, if ultimately recognized.
	As disclosed in Note 2 - Acquisition of BinOptics Corporation, the purchase accounting related to the acquisition of BinOptics includes preliminary income tax amounts subject to revision upon obtaining and analyzing all information. At the closing of the BinOptics Acquisition, BinOptics had, on a preliminary basis, federal net operating loss (NOL) carryforwards of approximately $38.4 million, which expire at various dates through 2034, and federal research and development tax credit carryforwards of $1.5 million. Although both the NOL and tax credit carryforwards are subject to change-in-control limitations within the Internal Revenue Code, we currently believe the limitation will not cause any of the carryforwards to expire unutilized. The aggregate net deferred income tax liability acquired in the BinOptics Acquisition is estimated to be $37.4 million arising from the BinOptics Acquisition, which includes a net deferred income tax asset of $14.9 million relating to NOL and tax credit carryforwards, and a net deferred income tax liability of $52.3 million related to the difference between the book and tax bases of the intangible and other assets acquired in the acquisition.

Related_Party_Transactions

Related Party Transactions	6 Months Ended
	Apr. 03, 2015
Related Party Transactions [Abstract]
Related Party Transactions	14. RELATED PARTY TRANSACTIONS
	GaAs Labs, a former stockholder and an affiliate of directors and then majority stockholders John and Susan Ocampo, engaged the Company to provide administrative and business development services to GaAs Labs on a time and materials basis. There are no minimum service requirements or payment obligations and the agreement may be terminated by either party with 30 days notice. For the three and six months ended April 4, 2014, the Company billed GaAs Labs $40,000 and $118,000, respectively, for services provided pursuant to this agreement and has recorded these amounts as other income in the accompanying condensed consolidated statements of operations.
	In the three and six months ended April 3, 2015, the Company recorded revenue of $15,000 from sales of product to a privately-held company with a common director.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	6 Months Ended
	Apr. 03, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	15. SUPPLEMENTAL CASH FLOW INFORMATION
	As of April 3, 2015 and April 4, 2014, the Company had $0.7 million and $1.2 million, respectively, in unpaid amounts related to purchases of property and equipment and intangibles included in accounts payable and accrued liabilities. These amounts have been excluded from the payments for purchases of property and equipment in the accompanying condensed consolidated statements of cash flows until paid.

Geographic_and_Significant_Cus

Geographic and Significant Customer Information	6 Months Ended
	Apr. 03, 2015
Segment Reporting [Abstract]
Geographic and Significant Customer Information	16. GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION
	The Company has one reportable operating segment which designs, develops, manufactures and markets semiconductors and modules. The determination of the number of reportable operating segments is based on the chief operating decision maker’s use of financial information for the purposes of assessing performance and making operating decisions. In evaluating financial performance and making operating decisions, the chief operating decision maker primarily uses consolidated revenue, gross profit and operating income (loss).
	Information about the Company’s operations in different geographic regions, based upon customer locations, is presented below (in thousands):
			Three Months Ended						Six Months Ended
	Revenue by Geographic Region		April 3,			April 4,			April 3,			April 4,
			2015			2014			2015			2014
	United States		$	58,550		$	50,915		$	122,603		$	104,804
	International (1)			66,335			56,912			117,146			87,177
	Total		$	124,885		$	107,827		$	239,749		$	191,981
			As of
	Long-Lived Assets by Geographic Region		April 3,			October 3,
			2015			2014
	United States		$	55,255		$	42,031
	International (2)			10,097			8,326
	Total		$	65,352		$	50,357
	-1	No international countries represented greater than 10% of total revenue during the periods presented.
	-2	No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia-Pacific region, which accounted for 12% at April 3, 2015 and 11% at October 3, 2014.
	The following is a summary of customer concentrations as a percentage of revenue and accounts receivable as of and for the periods presented:
			Three Months Ended						Six Months Ended
	Revenue		April 3,			April 4,			April 3,			April 4,
			2015			2014			2015			2014
	Customer A			16	%		13	%		17	%		18	%
	Customer B			18	%		19	%		17	%		21	%
	Customer C			11	%					11	%
			As of
	Accounts Receivable		April 3,			October 3,
			2015			2014
	Customer A			19	%		16	%
	Customer B			13	%		16	%
	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 3, 2015 and April 4, 2014, ten customers represented 63% and 64% of total revenue, respectively. For the six months ended April 3, 2015 and April 4, 2014, ten customers represented 62% and 62% of total revenue, respectively.

Subsequent_Events

Subsequent Events	6 Months Ended
	Apr. 03, 2015
Subsequent Events [Abstract]
Subsequent Events	17. SUBSEQUENT EVENTS
	As described in Note 2, new information was received by the Company on May 11, 2015 regarding the value of a minority investment in a U.S. based company which was previously carried at cost. This new information resulted in an impairment charge of $3.5 million which was recorded in the accompanying financial statements for the quarter ended April 3, 2015.

Description_of_Business_Basis_1

Description of Business, Basis of Presentation and Accounting (Policies)	6 Months Ended
	Apr. 03, 2015
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 leading provider of high-performance analog semiconductor solutions that enable next-generation internet applications, the cloud connected apps economy, and the modern, networked battlefield across the radio frequency (RF), microwave and millimeterwave spectrum and photonic semiconductor products. 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 consolidated 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.
	Under the Jumpstart Our Business Startups Act (JOBS Act), the Company qualified as an emerging growth company. Accordingly, the Company 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. We expect to cease being an emerging growth company at the end of fiscal year 2015, which will, among other things, require us to fully comply with Section 404 of the Sarbanes-Oxley Act of 2002 including obtaining an auditor attestation of our internal controls.
	The Company’s fiscal year ends on the Friday closest to the last day of September. For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks. Fiscal year 2015 is 52 weeks in length and the three and six months ended April 3, 2015 include 13 and 26 weeks, respectively. Fiscal year 2014 was 53 weeks in length and the three and six months ended April 4, 2014 include 13 and 27 weeks, respectively. The accompanying condensed consolidated financial statements are referred to as “consolidated” for all periods presented.
	On December 15, 2014, MACOM completed the acquisition of BinOptics Corporation (BinOptics), a supplier of high-performance photonic products (BinOptics Acquisition). The BinOptics Acquisition was accounted for as a purchase and the operations of BinOptics have been included in MACOM’s condensed consolidated financial statements since December 15, 2014, the date of acquisition.
	MACOM acquired Nitronex, LLC (Nitronex) in 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. Prior to the Nitronex Acquisition, GaAs Labs was 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 consolidated financial statements for the three months and six months ended April 4, 2014, combine MACOM’s historical consolidated financial statements with the historical financial statements of Nitronex from January 3, 2014 through April 4, 2014 and September 28, 2013 through April 4, 2014, and have been presented in a manner similar to a pooling-of-interests to include the results of operations of each business since the date of common control.
	On December 18, 2013, MACOM completed the acquisition of Mindspeed Technologies, Inc. (Mindspeed), a supplier of high-performance analog semiconductor solutions for communications infrastructure applications (Mindspeed Acquisition). 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.
	These consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended October 3, 2014, filed with the SEC on December 9, 2014.
	In the opinion of management, the accompanying unaudited 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 2015.
Principles of Consolidation	Principles of Consolidation—The accompanying consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Prior to the Nitronex Acquisition, MACOM and Nitronex did not have material intracompany transactions.
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.
Discontinued Operations	Discontinued Operations—In the second quarter of fiscal year 2014, the Company sold assets of the non-core wireless business of Mindspeed and presented the divested businesses as assets held for sale as of the date of the Mindspeed Acquisition. The operating results of the business are reflected in discontinued operations.
Foreign Currency Translation and Remeasurement	Foreign Currency Translation and Remeasurement—The Company’s consolidated financial statements are presented in U.S. dollars. While the majority of the Company’s foreign operations use the U.S. dollar as the functional currency, the financial statements of the Company’s foreign operations for which the functional currency is not the U.S. dollar are translated into U.S. dollars at the exchange rates in effect at the balance sheet dates (for assets and liabilities) and at average exchange rates (for revenue and expenses). The unrealized translation gains and losses on the net investment in these foreign operations are accumulated as a component of other comprehensive loss.
	The financial statements of the Company’s foreign operations where the functional currency is the U.S. dollar, but where the underlying transactions are transacted in a different currency, are re-measured at the exchange rate in effect at the balance sheet date with respect to monetary assets and liabilities. Nonmonetary assets and liabilities, such as inventories and property and equipment and related statements of operations accounts, such as cost of revenue and depreciation, are remeasured at historical exchange rates. Revenue and expenses, other than cost of revenue, amortization and depreciation, are translated at the average exchange rate for the period in which the transaction occurred. The net gains (losses) on foreign currency remeasurement are reflected in selling, general and administrative expense in the accompanying Condensed Consolidated Statements of Operations. The Company’s recognized net gains and losses on foreign exchange are included in selling, general and administrative expense and for all periods presented were immaterial.
Revenue Recognition	Revenue Recognition—The Company recognizes revenue when: (i) persuasive evidence of an arrangement exists; (ii) delivery or services have been rendered; (iii) the price is fixed or determinable; and (iv) collectability is reasonably assured. The Company recognizes revenue with the transfer of title and risk of loss and provides for reserves for returns and other allowances.
	The Company generally does not provide customers other than distributors the right to return product, with the exception of warranty related matters. Accordingly, the Company does not typically maintain a reserve for customers. Shipping and handling fees billed to customers are recorded as revenue while the related costs are classified as a component cost of revenue. The Company provides warranties for its products and accrues the cost of warranty claims in the period the related revenue is recorded.
	Prior to fiscal 2015, the Company had concluded that it had insufficient information as well as limited experience in estimating the effect of the right of distributors to return product and price protection and, accordingly, used the sell through approach of revenue recognition. Under this approach, the Company would recognize revenue from sales after the distributor resold the product to its end customer (the sell through basis). After concluding an extensive three year study of distributor related transactions, the Company completed an evaluation of its revenue recognition policy and concluded that it was more appropriate to recognize revenue to distributors at the time of shipment to the distributor (sell-in basis). The Company believes it now has sufficient data to predict future price adjustments from distributors and has a basis of being able to reasonably estimate these future price adjustments.
	On a consolidated basis, revenue from distribution customers impacted by the change in estimate accounts for approximately 10-15% of total consolidated revenue. Certain agreements with distribution customers provide for rights of return and compensation credits until such time as the Company’s products are sold by the distributors to their end customers. The Company has agreements with some distribution customers for various programs, including compensation, volume-based pricing, obsolete inventory, new products and stock rotation. Sales to these distribution customers, as well as the existence of compensation programs, are in accordance with terms set forth in written agreements with these distribution customers. In general, credits allowed under these programs are capped based upon individual distributor agreements. The Company records charges associated with these programs as a reduction of revenue at the time of sale with a corresponding adjustment to accounts receivables based upon historical activity. The Company’s policy is to use a twelve month rolling historical experience rate as well as an estimated general reserve percentage in order to estimate the necessary allowance to be recorded. The Company changed its revenue recognition policy from a sell through to a sell-in approach during the first fiscal quarter of 2015. The Company recognizes revenue when criteria for FASB ASC 605-15-25 are met.
	During the first fiscal quarter of 2015, the Company recorded corresponding adjustments related to this change in estimate to recognize previously deferred revenues. The net effect was an increase of $15.1 million, of which $12.4 million was from previously deferred revenue and $2.7 million was related to the change in distributor inventories. Additionally, the Company recognized the related deferred inventory costs of $4.7 million which resulted in a reduction to net loss of $8.5 million, or a reduction of $0.18 net loss per share when the change in estimate was recorded. During the three months ended April 3, 2015, this change in estimate resulted in revenue of $3.7 million and a reduction in net loss of $0.3 million, or $0.01 reduction of net loss per share, respectively. During the six months ended April 3, 2015, this change in estimate resulted in revenue of $18.8 million and a reduction in net loss of $8.8 million, or $0.18 reduction of net loss per share, respectively.
	The Company also established a new reserve of $5.5 million during the first quarter of fiscal year 2015 which was increased to $6.5 million for the quarter ended April 3, 2015 related to future rebates and returns under various programs associated with our distributor agreements. The amount of this reserve is largely driven by the individual distribution agreements and the Company’s business strategy whereby the Company will invoice the distributor at “list price”. The Company expects to issue compensation credits consistent with the distributor agreements. The difference between the list price and distributor selling price will vary by product grouping consistent with historical trends and marketing strategies. Historically, 90 percent of the credits issued to distributors are based on “list price” credits and 10 percent of the credits were for product returns and stock rotation rights, based upon the twelve month rolling historical experience rate.
	The table below shows the changes in gross and net distributor revenue and reserve balances associated with the change in estimate for the three and six months ended April 3, 2015:
			Three Months Ended						Six Months Ended
			January 2,			April 3,			April 3, 2015
			2015			2015
	Gross revenue effect of one-time change in estimate (1)		$	17			—		$	17
	Gross revenue effect associated with change in estimate (2)			3.6			4.7			8.3
	Total gross revenue resulting from change in estimate		$	20.6		$	4.7		$	25.3
	Net revenue effect of one-time change in estimate (3)		$	12.4			—			12.4
	Net revenue effect associated with change in estimate (4)			2.7			3.7			6.4
	Total net revenue resulting from change in estimate		$	15.1		$	3.7		$	18.8
	Reserve for future returns and credits (5)		($	5.5	)	($	1	)	($	6.5	)
	-1	This amount was recorded as deferred revenue as of October 3, 2014.
	-2	This amount represents the gross revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.
	-3	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.
	-4	This amount represents the net revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.
	-5	This amount reflects the change in the revenue reserve for future returns and credits. The balance as of April 3, 2015 is $6.5 million.
Recent Accounting Standards	Recent Accounting Standards —
	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.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in the ASU can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. The Company is currently evaluating the impact of ASU 2014-09, which is effective for the Company in our fiscal year beginning on September 30, 2017.
	In June 2014, the FASB issued ASU 2014-12—Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (a consensus of the FASB Emerging Issues Task Force) which addresses how to account for share-based performance awards including determining rendering service on the date the performance target is achieved. The Company is currently evaluating the impact of ASU 2014-12, which is effective for annual periods and interim periods within those annual periods, beginning after December 15, 2015.
	In February 2015, the FASB issued ASU 2015-02, Consolidation: Amendments to the Consolidation Analysis. ASU 2015-02 address concerns regarding the current accounting for consolidation of certain legal entities. A reporting entity may apply the amendments in this Update using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply the amendments retrospectively. The Company is currently evaluating the impact of ASU 2015-02, which is effective for the Company in our fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015.
	In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs. ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The Company is currently evaluating the impact of ASU 2015-03, which is effective for the Company in our fiscal years beginning after December 15, 2015, and interim periods within those fiscal years.

Description_of_Business_Basis_2

Description of Business, Basis of Presentation and Accounting (Tables)	6 Months Ended
	Apr. 03, 2015
Accounting Policies [Abstract]
Changes in Gross and Net Distributor Revenue and Reserve Balances Associated With Change in Estimate	The table below shows the changes in gross and net distributor revenue and reserve balances associated with the change in estimate for the three and six months ended April 3, 2015:
			Three Months Ended						Six Months Ended
			January 2,			April 3,			April 3, 2015
			2015			2015
	Gross revenue effect of one-time change in estimate (1)		$	17			—		$	17
	Gross revenue effect associated with change in estimate (2)			3.6			4.7			8.3
	Total gross revenue resulting from change in estimate		$	20.6		$	4.7		$	25.3
	Net revenue effect of one-time change in estimate (3)		$	12.4			—			12.4
	Net revenue effect associated with change in estimate (4)			2.7			3.7			6.4
	Total net revenue resulting from change in estimate		$	15.1		$	3.7		$	18.8
	Reserve for future returns and credits (5)		($	5.5	)	($	1	)	($	6.5	)
	-1	This amount was recorded as deferred revenue as of October 3, 2014.
	-2	This amount represents the gross revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.
	-3	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.
	-4	This amount represents the net revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.
	-5	This amount reflects the change in the revenue reserve for future returns and credits. The balance as of April 3, 2015 is $6.5 million.

Acquisitions_Tables

Acquisitions (Tables)	6 Months Ended
	Apr. 03, 2015
BinOptics Corporation [Member]
Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed	The aggregate purchase price for BinOptics is being allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The excess of the purchase price over the fair value of the acquired net assets represents cost and revenue synergies specific to the Company, as well as non-capitalizable intangible assets, such as the employee workforce acquired, and has been allocated to goodwill, none of which is tax deductible.
	The Company expects to finalize its allocation of purchase price during fiscal year 2015. The preliminary allocation of purchase price as of April 3, 2015, is as follows (in thousands):
		Original			Allocation			April 3, 2015
		Allocation			Adjustments			Adjusted
								Allocation
	Current assets	$	41,836		$	—		$	41,836
	Intangible assets		135,254			(1,054	)		134,200
	Other assets		14,090			—			14,090
	Total assets acquired		191,180			(1,054	)		190,126
	Liabilities assumed:
	Debt		1,491			—			1,491
	Deferred income taxes		37,745			(382	)		37,363
	Other liabilities		12,810			—			12,810
	Total liabilities assumed		52,046			(382	)		51,664
	Net assets acquired		139,134			(672	)		138,462
	Consideration:
	Cash paid upon closing, net of cash acquired		224,114			(115	)		223,999
	Goodwill	$	84,980		$	557		$	85,537
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):
		Amount			Useful Lives
					(Years)
	Developed technology	$	16,900		7
	Customer relationships		117,300		10
		$	134,200
Summary of Revenue and Earnings	The following is a summary of BinOptics revenue and earnings included in MACOM’s accompanying condensed consolidated statements of operations for the three and six months ended April 3, 2015 (in thousands):
		Three Months Ended			Six Months Ended
		April 3, 2015			April 3, 2015
	Revenue	$	17,079		$	19,207
	Loss before income taxes		(4,056	)		(5,435	)
Summary of Unaudited Supplemental Pro Forma Data	This pro forma data is presented for informational purposes only and does not purport to be indicative of the Company’s future results of operations.
		Three Months Ended						Six Months Ended
		April 3, 2015			April 4, 2014			April 3, 2015			April 4, 2014
	Revenue	$	124,885		$	118,435		$	251,616		$	209,199
	Net loss		(4,093	)		(27,045	)		(10,831	)		(38,925	)
Mindspeed Acquisition [Member]
Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed	The final allocation of purchase price is as follows:
		Amount
	Current assets	$	50,612
	Intangible assets		138,663
	Deferred income taxes		92,881
	Other assets		31,788
	Total assets acquired		313,944
	Liabilities assumed:
	Current liabilities		35,270
	Debt		40,177
	Other liabilities		5,865
	Total liabilities assumed		81,312
	Net assets acquired		232,632
	Consideration:
	Cash paid upon closing, net of cash acquired		232,028
	Fair value of vested awards assumed in acquisition		785
	Total consideration		232,813
	Goodwill	$	181
Components of Acquired Intangible Assets on a Preliminary Basis	The components of the acquired intangible assets were as follows (in thousands):
		Amount			Useful Lives
					(Years)
	Developed technology	$	109,263		7
	Customer relationships		11,430		10
	In-process research and development		17,970		N/A
		$	138,663
Summary of Revenue and Earnings	The following is a summary of Mindspeed’s revenue and earnings included in MACOM’s accompanying condensed consolidated statements of operations for the six months ended April 4, 2014 (in thousands):
		Six Months Ended
		April 4, 2014
	Revenue	$	33,809
	Income from continuing operations before income taxes and restructuring charges		(22,707	)
Summary of Unaudited Supplemental Pro Forma Data	This pro forma data is presented for informational purposes only and does not purport to be indicative of the Company’s future results of operations.
		Six Months
		Ended
		April 4, 2014
	Revenue	$	211,437
	Net loss		(35,812	)
Summary of Operating Results Through Dates of Divestitures Related to Divested Business	The accompanying consolidated statement of operations for the three and six months ended April 3, 2015 and April 4, 2014, includes the following operating results related to the divested wireless business (in thousands):
		Three Months Ended			Six Months Ended
		April 4, 2014			April 4, 2014
	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		(2,500	)		(4,605	)

Financial_Instruments_Tables

Financial Instruments (Tables)	6 Months Ended
	Apr. 03, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):
		April 3, 2015
		Fair		Active		Observable		Unobservable
		Value		Markets		Inputs		Inputs
				for		(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Assets
	Trading securities	$	500	$	—	$	—	$	500
	Total assets measured at fair value	$	500	$	—	$	—	$	500
	Liabilities
	Contingent consideration	$	820	$	—	$	—	$	820
	Common stock warrant liability		32,018		—		—		32,018
	Total liabilities measured at fair value	$	32,838	$	—	$	—	$	32,838
		October 3, 2014
		Fair		Active		Observable		Unobservable
		Value		Markets		Inputs		Inputs
				for		(Level 2)		(Level 3)
				Identical
				Assets
				(Level 1)
	Assets
	Trading securities	$	250	$	—	$	—	$	250
	Total assets measured at fair value	$	250	$	—	$	—	$	250
	Liabilities
	Contingent consideration	$	820	$	—	$	—	$	820
	Common stock warrant liability		15,801		—		—		15,801
	Total liabilities measured at fair value	$	16,621	$	—	$	—	$	16,621
Changes in Assets and Liabilities with Inputs Classified within Level 3 of Fair Value	The changes in assets and liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands):
		Three Months Ended April 3, 2015
		January 2,		Net Realized/		Purchases		Sales and		Transfers in		April 3,
		2015		Unrealized		and		Settlements		and/or (out)		2015
				Losses (Gains)		Issuances				of Level 3
				Included in
				Earnings
	Trading securities	$	250	$	—	$	250	$	—	$	—	$	500
	Contingent consideration	$	820	$	—	$	—	$	—	$	—	$	820
	Common stock warrant liability	$	26,409	$	5,609	$	—	$	—	$	—	$	32,018
		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
	Common stock warrant liability	$	10,591	$	4,066	$	—	$	—	$	—	$	14,657
		Six Months Ended April 3, 2015
		October 3,		Net Realized/		Purchases		Sales and		Transfers in		April 3,
		2014		Unrealized		and		Settlements		and/or (out)		2015
				Losses (Gains)		Issuances				of Level 3
				Included in
				Earnings
	Trading securities	$	250	$	—	$	250	$	—	$	—	$	500
	Contingent consideration	$	820	$	—	$	—	$	—	$	—	$	820
	Common stock warrant liability	$	15,801	$	16,217	$	—	$	—	$	—	$	32,018
		Six Months Ended April 4, 2014
		September 27,		Net Realized/		Purchases		Sales and		Transfers in		April 4,
		2013		Unrealized		and		Settlements		and/or (out)		2014
				Losses (Gains)		Issuances				of Level 3
				Included in
				Earnings
	Common stock warrant liability	$	11,873	$	2,784	$	—	$	—	$	—	$	14,657

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Apr. 03, 2015
Inventory Disclosure [Abstract]
Components of Inventories	Inventories consist of the following (in thousands):
		April 3,		October 3,
		2015		2014
	Raw materials	$	47,137	$	34,919
	Work-in-process		4,554		5,500
	Finished goods		32,386		33,153
	Total	$	84,077	$	73,572

Property_and_Equipment_Tables

Property and Equipment (Tables)	6 Months Ended
	Apr. 03, 2015
Property, Plant and Equipment [Abstract]
Components of Property and Equipment	Property and equipment consists of the following (in thousands):
		April 3,			October 3,
		2015			2014
	Machinery and equipment	$	78,774		$	68,438
	Leasehold improvements		9,183			7,998
	Furniture and fixtures		1,001			1,017
	Construction in process		24,126			12,918
	Computer equipment and software		8,133			7,758
	Total property and equipment		121,217			98,129
	Less accumulated depreciation and amortization		(55,865	)		(47,772	)
	Property and equipment, net	$	65,352		$	50,357

Debt_Tables

Debt (Tables)	6 Months Ended
	Apr. 03, 2015
Debt Disclosure [Abstract]
Schedule of Remained Outstanding on Term Loans	As of April 3, 2015, the following remained outstanding on the Term Loans:
	Principal balance	$	347,375
	Unamortized discount		(2,281	)
			345,094
	Current portion		3,500
	Long-term, less current portion	$	341,594
Schedule of Minimum Principal Payments under Term Loans	As of April 3, 2015, the minimum principal payments under the Term Loans in future fiscal years was as follows (in thousands):
	2015 (rest of fiscal year)	$	1,750
	2016		3,500
	2017		3,500
	2018		3,500
	2019		3,500
	Thereafter		331,625
	Total	$	347,375

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Apr. 03, 2015
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 3,			April 4,			April 3,		April 4,
		2015			2014			2015		2014
	Cost of revenue	$	7,347		$	6,504		$	12,706	$	8,022
	Selling, general and administrative		3,096			484			4,149		869
	Total	$	10,443		$	6,988		$	16,855	$	8,891
Summary of Intangible Assets	Intangible assets consist of the following (in thousands):
		April 3,			October 3,
		2015			2014
	Acquired technology	$	160,234		$	131,953
	Customer relationships		141,970			24,670
	In-process research and development		8,190			17,970
	Trade name		3,400			3,400
	Total		313,794			177,993
	Less accumulated amortization		(52,215	)		(35,360	)
	Intangible assets — net	$	261,579		$	142,633
Summary of Activity in Intangible Assets and Goodwill	A summary of the activity in intangible assets and goodwill follows (in thousands):
		Total			Acquired			Customer		In-Process			Trade		Goodwill
					Technology			Relationships		Research and			Name
										Development
	Balance at October 3, 2014	$	188,777		$	131,953		$	24,670	$	17,970		$	3,400	$	10,784
	BinOptics Acquisition		219,737			16,900			117,300		—			—		85,537
	Transfer to in service					9,780			—		(9,780	)		—		—
	Other intangibles purchased		1,601			1,601			—		—			—		—
	Balance at April 3, 2015	$	410,115		$	160,234		$	141,970	$	8,190		$	3,400	$	96,321
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years	As of April 3, 2015, estimated amortization of the intangible assets in future fiscal years, subject to the completion of the purchase price allocation for the BinOptics Acquisition, was as follows (in thousands):
		2015 (rest of			2016			2017		2018			2019		Thereafter		Total
		fiscal year)
	Amortization expense	$	20,666			35,064			35,388		34,011			32,277		92,584	$	249,990

Loss_Per_Share_Tables

Loss Per Share (Tables)	6 Months Ended
	Apr. 03, 2015
Earnings Per Share [Abstract]
Computation for Basic and Diluted Net Income (Loss) Per Share of Common Stock	The following table sets forth the computation for basic and diluted net loss per share of common stock (in thousands, except per share data):
		Three Months Ended						Six Months Ended
		April 3,			April 4,			April 3,			April 4,
		2015			2014			2015			2014
	Numerator:
	Net loss	$	(7,537	)	$	(22,122	)	$	(13,843	)	$	(31,043	)
	Denominator:
	Weighted average common shares outstanding-basic		50,593			46,808			49,100			46,656
	Dilutive effect of options, restricted stock and warrants		—			—			—			—
	Weighted average common shares outstanding-diluted		50,593			46,808			49,100			46,656
	Common stock loss per share:
	Basic	$	(0.15	)	$	(0.47	)	$	(0.28	)	$	(0.67	)
	Diluted	$	(0.15	)	$	(0.47	)	$	(0.28	)	$	(0.67	)

Restructurings_Tables

Restructurings (Tables)	6 Months Ended
	Apr. 03, 2015
Restructuring and Related Activities [Abstract]
Summary of Costs Related to Restructuring Actions	The following is a summary of the costs incurred and remaining balances included in accrued expenses primarily related to restructuring actions taken in conjunction with the Mindspeed Acquisition (in thousands):
	Balance as of October 3, 2014	$	801
	Current period adjustments		413
	Payments		(908	)
	Balance as of April 3, 2015	$	306

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	6 Months Ended
	Apr. 03, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees	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 3,			April 4,		April 3,		April 4,
		2015			2014		2015		2014
	Cost of revenue	$	549		$	426	$	895	$	709
	Research and development		1,165			728		2,127		1,212
	Selling, general and administrative		4,255			2,136		6,106		3,214
	Total stock-based compensation expense	$	5,969		$	3,290	$	9,128	$	5,135
Summary of Stock Option Activity	A summary of stock option activity for the six months ended April 3, 2015, 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-October 3, 2014		948		$	11.73		6.6	$	10,015
	Granted
	Exercised		(174	)		8.91
	Forfeited, canceled or expired		(14	)		22.62
	Outstanding-April 3, 2015		760		$	12.18		6.5	$	18,747
	Options vested and expected to vest as of April 3, 2015		760		$	12.18		6.5	$	18,747
	Options vested and exercisable as of April 3, 2015		760		$	12.17		6.5	$	18,741
Summary of Restricted Stock and Restricted Stock Units Activity	A summary of restricted stock and restricted stock unit activity for the six months ended April 3, 2015, is as follows (in thousands):
		Number of			Weighted-		Aggregate
		Shares			Average		Intrinsic
					Remaining		Value
					Contractual
					Term
					(in years)
	Unvested-October 3, 2014		1,720			2.6	$	37,203
	Granted		510
	Vested and released		(407	)
	Forfeited, canceled or expired		(46	)
	Issued and unvested-April 3, 2015		1,777			1.6	$	63,708
	Shares expected to vest-April 3, 2015		1,501			1.5	$	55,076

Geographic_and_Significant_Cus1

Geographic and Significant Customer Information (Tables)	6 Months Ended
	Apr. 03, 2015
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 3,			April 4,			April 3,			April 4,
			2015			2014			2015			2014
	United States		$	58,550		$	50,915		$	122,603		$	104,804
	International (1)			66,335			56,912			117,146			87,177
	Total		$	124,885		$	107,827		$	239,749		$	191,981
			As of
	Long-Lived Assets by Geographic Region		April 3,			October 3,
			2015			2014
	United States		$	55,255		$	42,031
	International (2)			10,097			8,326
	Total		$	65,352		$	50,357
	-1	No international countries represented greater than 10% of total revenue during the periods presented.
	-2	No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia-Pacific region, which accounted for 12% at April 3, 2015 and 11% at October 3, 2014.
Summary of Customer Concentrations as Percentage of Total Sales and Accounts Receivable	The following is a summary of customer concentrations as a percentage of revenue and accounts receivable as of and for the periods presented:
			Three Months Ended						Six Months Ended
	Revenue		April 3,			April 4,			April 3,			April 4,
			2015			2014			2015			2014
	Customer A			16	%		13	%		17	%		18	%
	Customer B			18	%		19	%		17	%		21	%
	Customer C			11	%					11	%
			As of
	Accounts Receivable		April 3,			October 3,
			2015			2014
	Customer A			19	%		16	%
	Customer B			13	%		16	%

Nature_of_Business_and_Basis_o

Nature of Business and Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014	Jan. 02, 2015	Oct. 03, 2014
			Segment
Description Of Business And Basis Of Presentation [Line Items]
Number of reportable operating segment			1
Reporting period description			The Companybs fiscal year ends on the Friday closest to the last day of September. For fiscal years in which there are 53 weeks, the first quarter reporting period includes 14 weeks. Fiscal year 2015 is 52 weeks in length and the three and six months ended April 3, 2015 include 13 and 26 weeks, respectively. Fiscal year 2014 was 53 weeks in length and the three and six months ended April 4, 2014 include 13 and 27 weeks, respectively.
Net revenue	$124,885,000	$107,827,000	$239,749,000	$191,981,000
Net income	-7,537,000	-22,122,000	-13,843,000	-31,043,000
Earnings per share	($0.15)	($0.47)	($0.28)	($0.67)
Deferred inventory costs	84,077,000		84,077,000			73,572,000
Allowance for Sales Returns [Member]
Description Of Business And Basis Of Presentation [Line Items]
Reserve for future rebates and returns	6,500,000		6,500,000		5,500,000
Allocation Adjustments [Member]
Description Of Business And Basis Of Presentation [Line Items]
Net revenue	3,700,000		18,800,000		15,100,000
Net income	-300,000		-8,800,000		-8,500,000
Earnings per share	($0.01)		($0.18)		($0.18)
Deferred inventory costs					4,700,000
Allocation Adjustments [Member] | Deferred Revenue [Member]
Description Of Business And Basis Of Presentation [Line Items]
Net revenue					12,400,000
Allocation Adjustments [Member] | Distributor Revenue [Member]
Description Of Business And Basis Of Presentation [Line Items]
Net revenue					$2,700,000
Nitronex LLC [Member]
Description Of Business And Basis Of Presentation [Line Items]
Date of acquisition			13-Feb-14

Changes_in_Gross_and_Net_Distr

Changes in Gross and Net Distributor Revenue and Reserve Balances Associated with Chane in Estimate (Detail) (USD $)	3 Months Ended			6 Months Ended			3 Months Ended
	Apr. 03, 2015		Apr. 04, 2014	Apr. 03, 2015		Apr. 04, 2014	Jan. 02, 2015
Change in Accounting Estimate [Line Items]
Total net revenue resulting from change in estimate	$124,885,000		$107,827,000	$239,749,000		$191,981,000
Allocation Adjustments [Member]
Change in Accounting Estimate [Line Items]
Total gross revenue resulting from change in estimate	4,700,000			25,300,000			20,600,000
Total net revenue resulting from change in estimate	3,700,000			18,800,000			15,100,000
Reserve for future returns and credits	-1,000,000	[1]		-6,500,000	[1]		-5,500,000	[1]
Allocation Adjustments [Member] | One-time Change in Estimate [Member]
Change in Accounting Estimate [Line Items]
Total gross revenue resulting from change in estimate				17,000,000	[2]		17,000,000	[2]
Total net revenue resulting from change in estimate				12,400,000	[3]		12,400,000	[3]
Allocation Adjustments [Member] | Change in Accounting Method Accounted for as Change in Estimate [Member]
Change in Accounting Estimate [Line Items]
Total gross revenue resulting from change in estimate	4,700,000	[4]		8,300,000	[4]		3,600,000	[4]
Total net revenue resulting from change in estimate	$3,700,000	[5]		$6,400,000	[5]		$2,700,000	[5]
[1]	This amount reflects the change in the revenue reserve for future returns and credits. The balance as of April 3, 2015 is $6.5 million.
[2]	This amount was recorded as deferred revenue as of October 3, 2014.
[3]	This amount represents the net revenue impact of the one-time change in estimate after applying the associated reserve for future credits and returns.
[4]	This amount represents the gross revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period.
[5]	This amount represents the net revenue impact of the change in estimate associated with increases in distributor inventories as compared to the prior reporting period after applying the associated reserve for future credits and returns.

Changes_in_Gross_and_Net_Distr1

Changes in Gross and Net Distributor Revenue and Reserve Balances Associated with Chane in Estimate (Parenthetical) (Detail) (Allowance for Sales Returns [Member], USD $)	Apr. 03, 2015	Jan. 02, 2015
In Millions, unless otherwise specified
Allowance for Sales Returns [Member]
Change in Accounting Estimate [Line Items]
Revenue reserve for future returns and credits	$6.50	$5.50

Acquisitons_Additional_Informa

Acquisitons - Additional Information (Detail) (USD $)	6 Months Ended		12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Oct. 03, 2014	Feb. 13, 2014	Jan. 02, 2015	Oct. 31, 2014	Nov. 17, 2014	Jan. 03, 2014	Dec. 18, 2013
								Business
Business Acquisition [Line Items]
Outstanding shares of common stock, par value	$0.00
Purchase price of acquisition	$222,955,000	$258,108,000
Business acquisition, intangible assets	219,737,000
Contingent purchase price, maximum	1,500,000		1,500,000
Goodwill acquired, deductible for tax purpose			1,700,000
Minority investment in equity			5,000,000
Investment, fair value	1,500,000
Impairment charge	3,500,000
Other Expense [Member]
Business Acquisition [Line Items]
Impairment charge	3,500,000
Convertible Debt [Member]
Business Acquisition [Line Items]
Minority investment in the convertible debt	200,000		300,000
Maximum [Member]
Business Acquisition [Line Items]
Minority equity investment percentage			20.00%
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
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Date of acquisition	18-Dec-13
Aggregate consideration payable					232,813,000
Business combination acquisition related costs						4,500,000
Weighted-average life of identified intangible assets acquired	7 years 3 months 18 days
Outstanding shares of common stock, par value									$0.01
Outstanding shares of common stock at a purchase price per share									$5.05
Purchase price of acquisition	232,028,000				232,028,000
Liabilities and incurred costs	81,312,000				81,312,000
Goodwill acquired, tax deductible	0
The fair value of the assumed options and stock awards	4,100,000
Stock option vested	785,000				785,000
Business acquisition, intangible assets	138,663,000
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Date of acquisition							15-Dec-14
Aggregate consideration payable							224,000,000
Business combination cash on hand and incurrence of additional borrowing							100,000,000
Business combination acquisition related costs	4,100,000
Weighted-average life of identified intangible assets acquired	9 years 7 months 6 days
Purchase price of acquisition	223,999,000
Liabilities and incurred costs	51,664,000
Business acquisition, intangible assets	134,200,000
I.K.E., Incorporated (IKE Micro) and Photonic Controls, LLC (Photonic Controls) [Member]
Business Acquisition [Line Items]
Aggregate consideration payable								2,800,000
Number of Businesses Acquired								2
Other Acquisitions [Member]
Business Acquisition [Line Items]
Business acquisition, goodwill			3,900,000
Business acquisition, intangible assets			1,600,000
Other Acquisitions [Member] | Minimum [Member]
Business Acquisition [Line Items]
Weighted-average life of identified intangible assets acquired	7 years
Other Acquisitions [Member] | Maximum [Member]
Business Acquisition [Line Items]
Weighted-average life of identified intangible assets acquired	10 years
Photenics Controls [Member]
Business Acquisition [Line Items]
Contingent consideration liability			$800,000

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		3 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Jan. 02, 2015	Nov. 17, 2014	Oct. 03, 2014
Consideration:
Cash paid upon closing, net of cash acquired	$222,955	$258,108
Goodwill	96,321				10,784
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Current assets			50,612
Intangible assets			138,663
Deferred income taxes			92,881
Other assets			31,788
Total assets acquired			313,944
Liabilities assumed:
Current liabilities			35,270
Debt			40,177
Other liabilities			5,865
Total liabilities assumed	81,312		81,312
Net assets acquired			232,632
Consideration:
Cash paid upon closing, net of cash acquired	232,028		232,028
Fair value of vested awards assumed in acquisition	785		785
Total consideration			232,813
Goodwill			181
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Current assets	41,836
Intangible assets	134,200
Other assets	14,090
Total assets acquired	190,126
Liabilities assumed:
Debt	1,491
Deferred income taxes	37,363
Other liabilities	12,810
Total liabilities assumed	51,664
Net assets acquired	138,462
Consideration:
Cash paid upon closing, net of cash acquired	223,999
Total consideration				224,000
Goodwill	85,537
BinOptics Corporation [Member] | Original Allocation [Member]
Business Acquisition [Line Items]
Current assets	41,836
Intangible assets	135,254
Other assets	14,090
Total assets acquired	191,180
Liabilities assumed:
Debt	1,491
Deferred income taxes	37,745
Other liabilities	12,810
Total liabilities assumed	52,046
Net assets acquired	139,134
Consideration:
Cash paid upon closing, net of cash acquired	224,114
Goodwill	84,980
BinOptics Corporation [Member] | Scenario, Adjustment [Member]
Business Acquisition [Line Items]
Intangible assets	-1,054
Total assets acquired	-1,054
Liabilities assumed:
Deferred income taxes	-382
Total liabilities assumed	-382
Net assets acquired	-672
Consideration:
Cash paid upon closing, net of cash acquired	-115
Goodwill	$557

Acquisitions_Components_of_Acq

Acquisitions - Components of Acquired Intangible Assets on a Preliminary Basis (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$219,737
BinOptics Corporation [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	134,200
Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	138,663
Developed Technology [Member] | BinOptics Corporation [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	16,900
Acquired intangible assets, Useful Lives	7 years
Developed Technology [Member] | Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	109,263
Acquired intangible assets, Useful Lives	7 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	117,300
Customer Relationships [Member] | BinOptics Corporation [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	117,300
Acquired intangible assets, Useful Lives	10 years
Customer Relationships [Member] | Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	11,430
Acquired intangible assets, Useful Lives	10 years
In-Process Research and Development [Member] | Mindspeed Acquisition [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$17,970

Acquisitions_Summary_of_Revenu

Acquisitions - Summary of Revenue and Earnings (Detail) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 03, 2015	Apr. 04, 2014
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Revenue	$17,079	$19,207
Income (loss) from continuing operations before income taxes and restructuring charges	-4,056	-5,435
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Revenue			33,809
Income (loss) from continuing operations before income taxes and restructuring charges			($22,707)

Acquisitions_Summary_of_Unaudi

Acquisitions - Summary of Unaudited Supplemental Pro Forma Data (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
BinOptics Corporation [Member]
Business Acquisition [Line Items]
Revenue	$124,885	$118,435	$251,616	$209,199
Net loss	-4,093	-27,045	-10,831	-38,925
Mindspeed Acquisition [Member]
Business Acquisition [Line Items]
Revenue				211,437
Net loss				($35,812)

Acquisitions_Summary_of_Operat

Acquisitions - Summary of Operating Results Through Dates of Divestitures Related to Divested Business (Detail) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2014	Apr. 04, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations	($2,500)	($4,605)
Mindspeed Acquisition [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	($2,500)	($4,605)

Financial_Instruments_Assets_a

Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $)	Apr. 03, 2015	Oct. 03, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$500	$250
Total liabilities measured at fair value	32,838	16,621
Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	500	250
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	820	820
Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	32,018	15,801
Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	500	250
Total liabilities measured at fair value	32,838	16,621
Unobservable Inputs (Level 3) [Member] | Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	500	250
Unobservable Inputs (Level 3) [Member] | Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	820	820
Unobservable Inputs (Level 3) [Member] | Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	$32,018	$15,801

Financial_Instruments_Changes_

Financial Instruments - Changes in Assets and Liabilities with Inputs Classified within Level 3 of Fair Value (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in financial asset with inputs classified within Level 3 of the fair value, beginning balance	$250		$250
Net Realized/ Unrealized Losses (Gains) Included in Earnings	0		0
Purchases and Issuances	250		250
Sales and Settlements	0		0
Transfers in and/or (out) of Level 3	0		0
Changes in financial asset with inputs classified within Level 3 of the fair value, ending balance	500		500
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	820		820
Purchases and Issuances	0		0
Sales and Settlements	0		0
Transfers in and/or (out) of Level 3	0		0
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	820		820
Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in financial liabilities with inputs classified within Level 3 of the fair value, beginning balance	26,409	10,591	15,801	11,873
Net Realized/ Unrealized Losses (Gains) Included in Earnings	5,609	4,066	16,217	2,784
Purchases and Issuances	0	0	0	0
Sales and Settlements	0	0	0	0
Transfers in and/or (out) of Level 3	0	0	0	0
Changes in financial liabilities with inputs classified within Level 3 of the fair value, ending balance	$32,018	$14,657	$32,018	$14,657

Financial_Instruments_Addition

Financial Instruments - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Apr. 03, 2015	Oct. 03, 2014
Fair Value Disclosures [Abstract]
Contingent consideration, maximum	$1.50	$1.50
Expected life of common stock warrants	5 years 8 months 12 days
Expected volatility	37.40%
Risk free rate	1.70%

Inventories_Components_of_Inve

Inventories - Components of Inventories (Detail) (USD $)	Apr. 03, 2015	Oct. 03, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$47,137	$34,919
Work-in-process	4,554	5,500
Finished goods	32,386	33,153
Total	$84,077	$73,572

Property_and_Equipment_Compone

Property and Equipment - Components of Property and Equipment (Detail) (USD $)	Apr. 03, 2015	Oct. 03, 2014
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Total property and equipment	$121,217	$98,129
Less accumulated depreciation and amortization	-55,865	-47,772
Property and equipment, net	65,352	50,357
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	78,774	68,438
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	9,183	7,998
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	1,001	1,017
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	24,126	12,918
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$8,133	$7,758

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$4.20	$3.90	$8	$7.10

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	0 Months Ended		6 Months Ended
	8-May-14	Sep. 26, 2013	Apr. 03, 2015	Apr. 04, 2014	Feb. 28, 2015
Debt Instrument [Line Items]
Indebtedness on revolving credit facility		$245,000,000	$100,000,000	$245,000,000
Repayment of outstanding credit facility	245,000,000		100,000,000
Estimated fair value of Term Loans			350,400,000
BinOptics Corporation [Member]
Debt Instrument [Line Items]
Indebtedness on revolving credit facility			100,000,000
Term Loans [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date			31-May-21
Revolving credit facility maximum borrowing availability	350,000,000
Deferred financing costs	2,100,000
Term loan discount rate			0.75%
Revolving credit facility interest rate			Borrowings under the Revolving Facility bear interest (payable quarterly) at (i) for LIBOR loans, a rate per annum equal to the LIBOR rate, plus an applicable margin in the range of 2.00% to 2.50% (based on the Companybs total net leverage ratio being within certain defined ranges), and (ii) for base rate loans, a rate per annum equal to the prime rate, plus an applicable margin in the range of 1.00% to 1.50% (based on the Companybs total net leverage ratio being within certain defined ranges).
Additional borrowing capacity that may be added through November 2015			75,000,000
Term loans payment term			The Term Loans are payable in quarterly principal installments equal to 0.25% of the aggregate dollar amount of all Term Loans outstanding at the signing of the Credit Agreement, with the remainder due on the maturity date.
Percentage of quarterly principal installment			0.25%
Principal amount			347,375,000
Term Loans [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Floor rate			0.75%
Applicable margin rate			3.75%
Term Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Floor rate			1.75%
Applicable margin rate			2.75%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date			30-Sep-18
Revolving credit facility amended date			5-Nov-13
Revolving credit facility maximum borrowing availability		300,000,000
Credit facility, remaining borrowing capacity			130,000,000
Debt issuance fee			8,700,000
Unamortized deferred financing costs			7,500,000
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Percentage of unused line fee			0.25%
Revolving Credit Facility [Member] | Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin rate			2.00%
Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin rate			1.00%
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of unused line fee			0.38%
Revolving Credit Facility [Member] | Maximum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin rate			2.50%
Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin rate			1.50%
Revolving Credit Facility One [Member]
Debt Instrument [Line Items]
Revolving credit facility maturity date			31-May-19
Revolving credit facility maximum borrowing availability	$100,000,000				$130,000,000

Debt_Schedule_of_Remained_Outs

Debt - Schedule of Remained Outstanding on Term Loans (Detail) (USD $)	Apr. 03, 2015	Oct. 03, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Current portion	$3,500	$3,478
Long-term, less current portion	341,594	343,178
Term Loans [Member]
Debt Instrument [Line Items]
Principal balance	347,375
Unamortized discount	-2,281
Long-term including current portion	345,094
Long-term including current portion	345,094
Current portion	3,500
Long-term, less current portion	$341,594

Debt_Schedule_of_Minimum_Princ

Debt - Schedule of Minimum Principal Payments under Term Loans (Detail) (Term Loans [Member], USD $)	Apr. 03, 2015
In Thousands, unless otherwise specified
Term Loans [Member]
Debt Instrument [Line Items]
2015 (rest of fiscal year)	$1,750
2016	3,500
2017	3,500
2018	3,500
2019	3,500
Thereafter	331,625
Total	$347,375

Intangible_Assets_Summary_of_A

Intangible Assets - Summary of Amortization Expense of Intangible Assets (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Finite-Lived Intangible Assets [Line Items]
Total	$10,443	$6,988	$16,855	$8,891
Cost of Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Total	7,347	6,504	12,706	8,022
Selling, General and Administrative [Member]
Finite-Lived Intangible Assets [Line Items]
Total	$3,096	$484	$4,149	$869

Intangible_Assets_Summary_of_I

Intangible Assets - Summary of Intangible Assets (Detail) (USD $)	Apr. 03, 2015	Oct. 03, 2014	Apr. 04, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$313,794	$177,993
Less accumulated amortization	-52,215	-35,360
Intangible assets - net	261,579	142,633
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	160,234	131,953
Less accumulated amortization	-39,400		-17,600
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	141,970	24,670
Less accumulated amortization	-12,800		-6,700
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	8,190	17,970
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$3,400	$3,400

Intangible_Assets_Summary_of_A1

Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Balance	$188,777
BinOptics Acquisition	219,737
Other intangibles purchased	1,601
Balance	410,115
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	17,970
Transfer to in service	-9,780
Balance	8,190
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Balance		3,400
Balance	3,400	3,400
Goodwill [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	10,784
BinOptics Acquisition	85,537
Balance	96,321
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	131,953
BinOptics Acquisition	16,900
Transfer to in service	9,780
Other intangibles purchased	1,601
Balance	160,234
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Balance	24,670
BinOptics Acquisition	117,300
Balance	$141,970

Intangible_Assets_Summary_of_E

Intangible Assets - Summary of Estimated Amortization of Intangible Assets (Detail) (USD $)	Apr. 03, 2015
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets, Net [Abstract]
2015 (rest of fiscal year)	$20,666
2016	35,064
2017	35,388
2018	34,011
2019	32,277
Thereafter	92,584
Total	$249,990

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended
	Jul. 31, 2013	Apr. 03, 2015	Apr. 04, 2014	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		$52,215,000		$35,360,000
Maximum potential payments to be made for technology licensing and transfer agreement	9,000,000
Amortization period of acquired technology	2016
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Period of potential payments to be made for technology licensing and transfer agreement	2016-07
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		39,400,000	17,600,000
Cost incurred in licensing and transfer of technology		7,700,000	5,000,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization		$12,800,000	$6,700,000

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	Apr. 03, 2015	Oct. 03, 2014
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	43,000	59,000

Loss_Per_Share_Computation_for

Loss Per Share - Computation for Basic and Diluted Net Loss Per Share of Common Stock (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Numerator:
Net loss	($7,537)	($22,122)	($13,843)	($31,043)
Denominator:
Weighted average common shares outstanding-basic	50,593	46,808	49,100	46,656
Weighted average common shares outstanding-diluted	50,593	46,808	49,100	46,656
Common stock loss per share:
Basic	($0.15)	($0.47)	($0.28)	($0.67)
Diluted	($0.15)	($0.47)	($0.28)	($0.67)
Stock Options Restricted Stock and Warrants [Member]
Denominator:
Dilutive effect of options, restricted stock and warrants	0	0	0	0

Loss_Per_Share_Additional_Info

Loss Per Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Earnings Per Share [Abstract]
Common stock issuable upon exercise of stock options, restricted stock and stock units and warrants	1,908	1,406	1,815	1,412

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Apr. 03, 2015	Oct. 03, 2014
Commitments and Contingencies Disclosure [Abstract]
Outstanding non-cancelable purchase commitments	$8	$5.20

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. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Restructuring and Related Activities [Abstract]
Beginning Balance of accrued costs			$801
Current period adjustments	413	2,635	413	15,725
Payments			-908
Ending Balance of accrued costs	$306		$306

ShareBased_Compensation_Plans_

Share-Based Compensation Plans - 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. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	$5,969	$3,290	$9,128	$5,135
Cost of Revenue [Member]
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	549	426	895	709
Research and Development [Member]
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	1,165	728	2,127	1,212
Selling, General and Administrative [Member]
Components Of Salaries And Benefits [Line Items]
Total stock-based compensation expense	$4,255	$2,136	$6,106	$3,214

ShareBased_Compensation_Plans_1

Share-Based Compensation Plans - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jan. 23, 2015	Apr. 30, 2014	Apr. 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted targeted vesting period		10 years	4 years
Percentage of options granted to vest at the end of One year			25.00%
Exercisable period of options granted			10 years
Vesting period of RSU granted			Annually over one to five years
Shares available for future grants			9,400,000
Total intrinsic value of options exercised			$4
Stock options granted			0
Stock options granted, fair value		3.5
Compensation cost expected to be recognized		3 years
Target price per share for any remaining unamortized compensation cost that will be recognized	$32.55	$32.55
Compensation expense to be recognized	2.5
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected to be recognized			3 years 10 months 24 days
Fair value of restricted stock awards vesting, total			13.1
Total unrecognized compensation cost			$28.90
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted		405,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price per share	$34.79

ShareBased_Compensation_Plans_2

Share-Based Compensation Plans - Summary of Stock Option Activity (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 03, 2015	Oct. 03, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Aggregate Intrinsic Value, Outstanding, Beginning balance		$10,015
Number of Shares, Outstanding, Beginning balance	948
Number of Shares, Granted	0
Number of Shares, Exercised	-174
Number of Shares, Forfeited, canceled or expired	-14
Number of Shares, Outstanding, Ending balance	760	948
Number of Shares, Options vested and expected to vest as of April 3, 2015	760
Number of Shares, Options vested and exercisable as of April 3, 2015	760
Weighted-Average Exercise Price Per Share, Outstanding, Beginning balance	$11.73
Weighted-Average Exercise Price Per Share, Granted	$0
Weighted-Average Exercise Price Per Share, Exercised	$8.91
Weighted-Average Exercise Price Per Share, Forfeited, canceled or expired	$22.62
Weighted-Average Exercise Price Per Share, Outstanding, Ending balance	$12.18	$11.73
Weighted-Average Exercise Price Per Share, Options vested and expected to vest as of April 3, 2015	$12.18
Weighted-Average Exercise Price Per Share, Options vested and exercisable as of April 3, 2015	$12.17
Weighted-Average Remaining Contractual Term (in years), Outstanding	6 years 6 months	6 years 7 months 6 days
Weighted-Average Remaining Contractual Term (in years), Options vested and expected to vest as of April 3, 2015	6 years 6 months
Weighted-Average Remaining Contractual Term (in years), Options vested and exercisable as of April 3, 2015	6 years 6 months
Aggregate Intrinsic Value, Outstanding, Ending balance	18,747
Aggregate Intrinsic Value, Options vested and expected to vest as of April 3, 2015	18,747
Aggregate Intrinsic Value, Options vested and exercisable as of April 3, 2015	$18,741

ShareBased_Compensation_Plans_3

Share-Based Compensation Plans - Summary of Restricted Stock and Restricted Stock Units Activity (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Shares, Issued and unvested - beginning balance	1,720
Number of Shares, Granted	510
Number of Shares, Vested and released	-407
Number of Shares, Forfeited, canceled or expired	-46
Number of Shares, Issued and unvested - Issued and unvested-ending balance	1,777
Number of Shares, Shares expected to vest	1,501
Weighted-Average Remaining Contractual Term (in Years), Issued and unvested - October 3, 2014	2 years 7 months 6 days
Weighted-Average Remaining Contractual Term (in Years), Issued and unvested - Issued and unvested-April 3, 2015	1 year 7 months 6 days
Weighted-Average Remaining Contractual Term (in Years), Shares expected to vest	1 year 6 months
Aggregate Intrinsic Value, Issued and unvested - Beginning Balance	$37,203
Aggregate Intrinsic Value, Issued and unvested shares - Ending Balance	63,708
Aggregate Intrinsic Value, Shares expected to vest	$55,076

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014	Oct. 03, 2014
Income Taxes [Line Items]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Unrecognized tax benefit, reduction in current deferred tax assets	$1,400,000		$1,400,000
Unrecognized tax benefit	1,700,000		1,700,000		1,700,000
BinOptics Corporation [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	38,400,000		38,400,000
Expiration beginning year for net operating loss carryforwards			2034
Federal research and development tax credit carryforwards	1,500,000		1,500,000
Deferred income tax liability	37,363,000		37,363,000
Net deferred income tax liability	52,300,000		52,300,000
BinOptics Corporation [Member] | NOL and tax credit carryforwards [Member]
Income Taxes [Line Items]
Deferred income tax asset	14,900,000		14,900,000
Other Noncurrent Liabilities [Member]
Income Taxes [Line Items]
Unrecognized tax benefit	$300,000		$300,000

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Related Party Transactions [Abstract]
Minimum service requirements or payment obligations	$0		$0
Notice period to terminate agreement			30 days
Other income-related party	$15,000	$40,000	$15,000	$118,000

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Unpaid amounts related to purchase of assets	$0.70	$1.20

Geographic_and_Significant_Cus2

Geographic and Significant Customer Information - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable operating segment			1
Number of major customers				10
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	63.00%	64.00%	62.00%	62.00%

Geographic_and_Significant_Cus3

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Detail) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Apr. 03, 2015		Apr. 04, 2014		Apr. 03, 2015		Apr. 04, 2014		Oct. 03, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	$124,885		$107,827		$239,749		$191,981
Long-Lived Assets by Geographic Region	65,352				65,352				50,357
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	58,550		50,915		122,603		104,804
Long-Lived Assets by Geographic Region	55,255				55,255				42,031
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	66,335	[1]	56,912	[1]	117,146	[1]	87,177	[1]
Long-Lived Assets by Geographic Region	$10,097	[2]			$10,097	[2]			$8,326	[2]
[1]	No international countries represented greater than 10% of total revenue during the periods presented.
[2]	No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia-Pacific region, which accounted for 12% at April 3, 2015 and 11% at October 3, 2014.

Geographic_and_Significant_Cus4

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Parenthetical) (Detail)	Apr. 03, 2015	Oct. 03, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
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%	11.00%

Geographic_and_Significant_Cus5

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Total Sales and Accounts Receivable (Detail) (Customer Concentration Risk [Member])	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 03, 2015	Apr. 04, 2014	Apr. 03, 2015	Apr. 04, 2014	Oct. 03, 2014
Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	63.00%	64.00%	62.00%	62.00%
Customera [Member] | Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	16.00%	13.00%	17.00%	18.00%
Customera [Member] | Accounts Receivable [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage			19.00%		16.00%
Customer B [Member] | Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	18.00%	19.00%	17.00%	21.00%
Customer B [Member] | Accounts Receivable [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage			13.00%		16.00%
Customer C [Member] | Sales Revenue, Net [Member]
Revenue from External Customer [Line Items]
Concentration risk, percentage	11.00%		11.00%

Subsequent_Events_Additional_I

Subsequent Events -Additional Information (Detail) (USD $)	6 Months Ended
	Apr. 03, 2015
Subsequent Event [Line Items]
Investment, fair value	$1,500,000
Impairment charge	3,500,000
Other Expense [Member]
Subsequent Event [Line Items]
Impairment charge	$3,500,000