MACOM Technology Solutions (MTSI) 10-Q 1 Aug 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jun. 29, 2018	Jul. 27, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
Entity Central Index Key	1,493,594
Document Type	10-Q
Document Period End Date	Jun. 29, 2018
Amendment Flag	false
Current Fiscal Year End Date	--09-28
Entity Filer Category	Large Accelerated Filer
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2,018
Entity Common Stock, Shares Outstanding		65,162,822

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Current assets:
Cash and cash equivalents	$ 85,268	$ 130,104
Short-term investments	97,723	84,121
Accounts receivable (less allowances of $7,643 and $9,410, respectively)	101,285	136,096
Inventories	122,866	136,074
Income tax receivable	19,945	18,493
Assets held for sale	4,971	35,571
Prepaid and other current assets	22,335	22,438
Total current assets	454,393	562,897
Property and equipment, net	139,415	131,019
Goodwill	314,401	313,765
Intangible assets, net	533,876	621,092
Deferred income taxes	1,662	948
Other investments	34,259	0
Other long-term assets	7,709	7,402
TOTAL ASSETS	1,485,715	1,637,123
Current liabilities:
Current portion of lease payable	499	815
Current portion of long-term debt	6,885	6,885
Accounts payable	29,370	47,038
Accrued liabilities	46,446	58,243
Liabilities held for sale	0	2,144
Deferred revenue	8,279	1,994
Total current liabilities	91,479	117,119
Lease payable, less current portion	26,658	17,275
Long-term debt, less current portion	659,146	661,471
Warrant liability	15,880	40,775
Deferred income taxes	7,791	15,172
Other long-term liabilities	5,724	7,937
Total liabilities	806,678	859,749
Stockholders’ equity:
Common stock	65	64
Treasury stock, at cost	(330)	(330)
Accumulated other comprehensive income	3,757	2,977
Additional paid-in capital	1,067,028	1,041,644
Accumulated deficit	(391,483)	(266,981)
Total stockholders’ equity	679,037	777,374
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,485,715	$ 1,637,123

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 7,643	$ 9,410

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 137,872	$ 194,555	$ 419,210	$ 532,391
Cost of revenue	89,703	101,926	244,486	292,403
Gross profit	48,169	92,629	174,724	239,988
Operating expenses:
Research and development	48,240	38,729	131,487	108,588
Selling, general and administrative	42,471	46,666	119,393	145,488
Impairment charges	0	0	6,575	0
Restructuring charges	102	586	6,302	2,342
Total operating expenses	90,813	85,981	263,757	256,418
(Loss) income from operations	(42,644)	6,648	(89,033)	(16,430)
Other (expense) income
Warrant liability (expense) gain	(6,728)	(9,085)	24,895	(16,481)
Interest expense, net	(8,039)	(7,178)	(23,249)	(21,902)
Other expense	(37,281)	(1,139)	(41,413)	(2,042)
Total other expense, net	(52,048)	(17,402)	(39,767)	(40,425)
Loss before income taxes	(94,692)	(10,754)	(128,800)	(56,855)
Income tax (benefit) expense	(9,482)	3,223	(11,153)	93,559
Loss from continuing operations	(85,210)	(13,977)	(117,647)	(150,414)
Loss from discontinued operations	(220)	(13,700)	(5,837)	(8,358)
Net loss	$ (85,430)	$ (27,677)	$ (123,484)	$ (158,772)
Basic loss per share:
Loss from continuing operations	$ (1.313)	$ (0.22)	$ (1.82)	$ (2.53)
Loss from discontinued operations	(0.003)	(0.21)	(0.09)	(0.14)
Loss per share - basic	(1.32)	(0.43)	(1.91)	(2.67)
Diluted loss per share:
Loss from continuing operations	(1.313)	(0.22)	(2.19)	(2.53)
Loss from discontinued operations	(0.003)	(0.21)	(0.09)	(0.14)
Loss per share - diluted	$ (1.32)	$ (0.43)	$ (2.28)	$ (2.67)
Shares used:
Basic (in shares)	64,920	64,019	64,598	59,524
Diluted (in shares)	64,920	64,019	65,198	59,524

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (85,430)	$ (27,677)	$ (123,484)	$ (158,772)
Unrealized gain (loss) on short-term investments, net of tax	59	(77)	(455)	(71)
Foreign currency translation (loss) gain, net of tax	(3,475)	(307)	1,235	(6,358)
Other comprehensive (loss) income, net of tax	(3,416)	(384)	780	(6,429)
Total comprehensive loss	$ (88,846)	$ (28,061)	$ (122,704)	$ (165,201)

Condensed Consolidated Stateme6

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Treasury Stock, Shares			(23)
Balance at beginning of period (in shares) at Sep. 29, 2017		64,279
Balance at beginning of period at Sep. 29, 2017	$ 777,374	$ 64	$ (330)	$ 2,977	$ 1,041,644	$ (266,981)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		22
Stock options exercises	65				65
Vesting of restricted common stock and units (in shares)		883
Vesting of restricted common stock and units	1	$ 1
Issuance of common stock pursuant to employee stock purchase plan (in shares)		305
Issuance of common stock pursuant to employee stock purchase plan	6,879				6,879
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(307)
Shares repurchased for stock withholdings on restricted stock awards	(6,673)				(6,673)
Share-based compensation	24,095				24,095
Other comprehensive income, net of tax	780			780
Net loss	(123,484)					(123,484)
Balance at end of period (in shares) at Jun. 29, 2018		65,182
Balance at end of period at Jun. 29, 2018	679,037	$ 65	$ (330)	$ 3,757	1,067,028	(391,483)
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 0				$ 1,018	$ (1,018)
Treasury Stock, Shares			(23)

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017
Statement of Cash Flows [Abstract]
Payments of Financing Costs	$ 505	$ 9,077
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	(123,484)	(158,772)
Adjustments to reconcile net loss to net cash provided by operating activities (net of acquisitions):
Depreciation and intangibles amortization	83,695	65,823
Share-based compensation	24,095	27,666
Warrant liability (gain) expense	(24,895)	16,481
Acquired inventory step-up amortization	224	43,985
Deferred financing cost amortization	3,572	2,545
Acquisition prepaid compensation amortization	0	506
Loss on extinguishment of debt	0	2,008
Loss (gain) on disposition of business	(34,046)	23,645
Deferred income taxes	(8,502)	87,608
Impairment related charges	9,143	0
Loss on minority equity investment	7,241	0
Changes in assets held for sale from discontinued operations	(6,266)	6,329
Other adjustments, net	936	285
Change in operating assets and liabilities (net of acquisitions):
Accounts receivable	34,769	(12,755)
Inventories	(1,617)	7,997
Prepaid expenses and other assets	(3,682)	1,104
Accounts payable	(11,049)	(4,718)
Accrued and other liabilities	(1,952)	(17,821)
Income taxes	(5,058)	4,063
Net cash provided by operating activities	11,216	48,689
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, net	0	(231,712)
Purchases of property and equipment	(39,443)	(24,496)
Sale of businesses and assets	5,000	215
Proceeds from sales and maturities of short-term investments	85,422	32,420
Purchases of short-term investments	(99,363)	(90,508)
Purchases of other investments	(5,000)	0
Proceeds associated with discontinued operations	(263)	23,645
Net cash used in investing activities	(53,647)	(290,436)
Proceeds from Notes Payable	0	96,558
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from stock option exercises and employee stock purchases	6,944	8,162
Payments on notes payable	(5,163)	(3,026)
Payments of capital leases and assumed debt	(571)	(928)
Repurchase of common stock	(6,673)	(18,092)
Proceeds from corporate facility financing obligation	4,000	4,250
Payments of contingent consideration and other	478	1,296
Net cash (used in) provided by financing activities	(2,446)	76,551
Foreign currency effect on cash	41	(175)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(44,836)	(165,371)
CASH AND CASH EQUIVALENTS — Beginning of period	130,104	332,977
CASH AND CASH EQUIVALENTS — End of period	85,268
Supplemental disclosure of non-cash activities
Capitalized construction costs for capital leases	16,500	1,300
Common stock issued (9,544,125 shares of our common stock at $47.53 per share)	$ 0	$ 465,082

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Jun. 29, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Unaudited Interim Financial Information —The accompanying unaudited, condensed consolidated financial statements have been prepared according to the rules and regulations of the United States (the “U.S.”) Securities and Exchange Commission (“SEC”) and, in the opinion of management, reflect all adjustments, which include normal recurring adjustments, necessary for a fair statement of the condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statement of comprehensive loss, condensed consolidated statements of stockholders' equity and condensed consolidated statements of cash flows of MACOM Technology Solutions Holdings, Inc. (“MACOM”, the “Company”, “us”, “we” or “our”) for the periods presented. We prepare our interim financial information using the same accounting principles we use for our annual audited consolidated financial statements. Certain information and note disclosures normally included in the annual audited consolidated financial statements have been condensed or omitted in accordance with prescribed SEC rules. We believe that the disclosures made in our condensed consolidated financial statements and the accompanying notes are adequate to make the information presented not misleading. The consolidated balance sheet at September 29, 2017 is as reported in our audited consolidated financial statements as of that date. Our accounting policies are described in the notes to our September 29, 2017 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 29, 2017 filed with the SEC on November 15, 2017 , our Quarterly Report on Form 10-Q for the fiscal quarter ended December 29, 2017 filed with the SEC on February 7, 2018 and our Quarterly Report on Form 10-Q for the fiscal quarter ended March 30, 2018 filed with the SEC on May 3, 2018. We recommend that the financial statements included in this Quarterly Report on Form 10-Q be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for our fiscal year ended September 29, 2017 . Principles of Consolidation— We have one reportable segment, semiconductors and modules. The accompanying consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. The fiscal years 2018 and 2017 include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we typically include the extra week arising in such fiscal years in the first quarter. Use of Estimates —The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions. Recent Accounting Pronouncements —Our Recent Accounting Pronouncements are described in the notes to our September 29, 2017 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 29, 2017 . In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers ("Topic 606"). In March, April, May and December 2016, the FASB issued additional guidance related to Topic 606. The new standard superseded nearly all existing revenue recognition guidance. Under Topic 606, an entity is required to recognize revenue upon transfer of promised goods or services to customers in an amount that reflects the expected consideration to be received in exchange for those goods or services. Topic 606 defines a five-step process in order to achieve this core principle, which may require the use of judgment and estimates, and also requires expanded qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including significant judgments and estimates used. The new standard also defines accounting for certain costs related to origination and fulfillment of contracts with customers, including whether such costs should be capitalized. The new standard permits adoption either by using (i) a full retrospective approach for all periods presented in the period of adoption or (ii) a modified retrospective approach where the new standard is applied in the financial statements starting with the year of adoption. Under both approaches, cumulative impact of the adoption is reflected as an adjustment to retained earnings (accumulated equity (deficit)) as of the earliest date presented in accordance with the new standard. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date , which delayed the effective date of the new standard from January 1, 2017 to January 1, 2018. We plan to implement the new guidance on September 29, 2018, the beginning of our next fiscal year, using the modified retrospective approach, applied to those contracts that were not completed as of that date. We developed a project plan for the implementation of the guidance, including a review of all revenue streams to identify any differences in the timing, measurement or presentation of revenue recognition and costs to obtain or fulfill the contracts. We have made progress in completing the assessment of the potential impacts of the standard, including any impacts from issued amendments. We do not expect the adoption of Topic 606 to have a material impact on our financial position and results of operations. As we continue our evaluation, we are also assessing any disclosure requirements and preparing to implement changes to accounting policies, business processes and internal controls to support the new standard. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation ("ASU 2016-09"), which simplifies several aspects of the accounting for employee share-based payment transactions for both public and nonpublic entities. We adopted this ASU as of September 30, 2017. Prior to ASU 2016-09, the accounting for share-based compensation required forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. ASU 2016-09 allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. ASU 2016-09 requires an entity that elects to account for forfeitures when they occur to apply the accounting change on a modified retrospective basis as a cumulative-effect adjustment to retained earnings as of the date of adoption. We elected to account for forfeitures when they occur, and recorded a $1.0 million cumulative-effect adjustment to beginning retained earnings as of September 30, 2017. We did not record any adjustments to retained earnings for the tax effect of the adoption of ASU 2016-09 as we are in a full valuation allowance position against our U.S. deferred tax asset. ASU 2016-09 requires all excess tax benefits and tax deficiencies to be recorded in the consolidated income statement on a prospective basis when the awards vest or are settled. Due to our full U.S. valuation allowance, ASU 2016-09 had no impact to our tax expense for the three and nine months ended June 29, 2018 .

Acquisitions

Acquisitions	9 Months Ended
	Jun. 29, 2018
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Acquisition of Applied Micro Circuits Corporation— On January 26, 2017, we completed the acquisition of Applied Micro Circuits Corporation (“AppliedMicro”), a global provider of silicon solutions for next-generation cloud infrastructure and Cloud Data Centers, as well as connectivity products for edge, metro and long-haul communications equipment (the “AppliedMicro Acquisition”). We acquired AppliedMicro in order to expand our business in enterprise and Cloud Data Center applications. In connection with the AppliedMicro Acquisition, we acquired all of the outstanding common stock of AppliedMicro for total consideration of $695.4 million , which included cash paid of $287.1 million , less $56.8 million of cash acquired, and equity issued at a fair value of $465.1 million . In conjunction with the equity issued, we granted vested out-of-money stock options and unvested restricted stock units to replace outstanding vested out-of-money stock options and unvested restricted stock units of AppliedMicro. The total fair value of granted vested out-of-money stock options and unvested restricted stock units was $14.5 million , of which $9.3 million was attributable to pre-combination service and was included in the total consideration transferred. We funded the AppliedMicro Acquisition with cash on-hand and short-term investments. We recorded transaction costs related to the acquisition in selling, general and administrative expense. For the three and nine months ended June 29, 2018 , we recorded no transaction costs. For the three and nine months ended June 30, 2017 , we recorded transaction costs of $0.1 million and $11.9 million , respectively. The AppliedMicro Acquisition was accounted for as a stock purchase and the operations of AppliedMicro have been included in our consolidated financial statements since the date of acquisition. We recognized the AppliedMicro 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 AppliedMicro has been allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair value 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 will be tax deductible. In connection with the acquisition of AppliedMicro, we entered into a plan to divest a portion of AppliedMicro's business specifically related to its compute business (the "Compute business"). The divestiture of the Compute business was completed on October 27, 2017. See Note 3 - Divested Business and Discontinued Operations for further details of the divestiture. The following table summarizes the total estimated acquisition consideration (in thousands): Cash consideration paid to AppliedMicro common stockholders $ 287,060 Common stock issued (9,544,125 shares of our common stock at $47.53 per share) 453,632 Equity consideration for vested "in the money" stock options and unvested restricted stock units 2,143 Fair value of the replacement equity awards attributable to pre-acquisition service 9,307 Total consideration paid, excluding cash acquired $ 752,142 We finalized the purchase accounting during the fiscal quarter ended December 29, 2017. The final purchase price allocation is as follows (in thousands): Preliminary Allocation as of Allocation Adjustments Adjusted Allocation September 29, 2017 December 29, 2017 Current assets $ 70,434 $ (553 ) $ 69,881 Intangible assets 412,848 — 412,848 Assets held for sale 40,944 — 40,944 Other assets 9,800 — 9,800 Total assets acquired 534,026 (553 ) 533,473 Liabilities assumed: Liabilities held for sale 4,444 — 4,444 Other liabilities 17,627 651 18,278 Total liabilities assumed 22,071 651 22,722 Net assets acquired 511,955 (1,204 ) 510,751 Consideration: Cash paid upon closing 230,298 — 230,298 Common stock issued 455,775 — 455,775 Equity instruments issued 9,307 — 9,307 Total consideration $ 695,380 $ — $ 695,380 Goodwill $ 183,425 $ 1,204 $ 184,629 The components of the acquired intangible assets were as follows (in thousands): Included In Assets Held For Sale Included in Retained Business Useful Lives (Years) Developed technology $ 9,600 $ 78,448 7 years Customer relationships — 334,400 14 years Total acquired intangible assets $ 9,600 $ 412,848 The overall weighted-average life of the identified intangible assets acquired in the AppliedMicro Acquisition is estimated to be 12.7 years and the assets are being amortized over their estimated useful lives based upon the pattern over which we expect to receive the economic benefit from these assets. The following is a summary of AppliedMicro revenue and earnings included in our accompanying condensed consolidated statements of operations for the three and nine months ended June 30, 2017 (in thousands): Three Months Ended Nine Months Ended June 30, 2017 June 30, 2017 Revenue $ 42,019 $ 78,464 Loss from continuing operations (3,744 ) (34,049 ) Loss from discontinued operations (15,574 ) (32,004 ) The pro forma statement of operations data for the nine months ended June 30, 2017 , below, gives effect to the AppliedMicro Acquisition, described above, as if it had occurred at October 2, 2015. These amounts have been calculated after applying our accounting policies and adjusting the results of AppliedMicro to reflect transaction costs, retention compensation expense, the impact of the step-up to the value of acquired inventory, as well as the additional intangible amortization that would have been charged assuming the fair value adjustments had been applied and incurred since October 2, 2015. This pro forma data is presented for informational purposes only and does not purport to be indicative of our future results of operations. Nine Months Ended June 30, 2017 Revenue $ 589,347 Income from continuing operations (90,809 ) Loss from discontinued operations (33,015 ) Acquisition of Picometrix LLC— On August 9, 2017, we completed the acquisition of Picometrix LLC ("Picometrix"), a supplier of optical-to-electrical converters for Cloud Data Center infrastructure (the "Picometrix Acquisition"). We acquired Picometrix in order to expand our business in enterprise and Cloud Data Center applications. The purchase consideration was $33.5 million , comprised of an upfront cash payment of $29.5 million , and $4.0 million placed in escrow for potential satisfaction of certain indemnification obligations that may arise from the closing date through December 15, 2018. For the three and nine months ended June 29, 2018 , we recorded no transaction costs. The Picometrix Acquisition was accounted for as a business acquisition, and the operations of Picometrix have been included in our consolidated financial statements since the date of acquisition. We recognized the Picometrix assets acquired and liabilities assumed based upon the fair value of such assets measured as of the date of acquisition. The aggregate purchase price for the Picometrix assets and liabilities has been allocated to the tangible and identifiable intangible assets acquired based on their estimated fair value at the date of acquisition. The excess of the purchase price over the fair value of the acquired 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, all of which will be tax deductible. We finalized the purchase accounting during the fiscal quarter ended June 29, 2018. The final purchase price allocation is as follows (in thousands): Preliminary Allocation as of Allocation Adjustments Adjusted Allocation September 29, 2017 June 29, 2018 Current assets $ 7,375 $ (1,088 ) $ 6,287 Intangible assets 19,000 — 19,000 Other assets 3,301 (81 ) 3,220 Total assets acquired 29,676 (1,169 ) 28,507 Current liabilities 2,169 142 2,311 Other liabilities 190 275 465 Total liabilities assumed 2,359 417 2,776 Net assets acquired 27,317 (1,586 ) 25,731 Consideration: Cash paid upon closing, net of cash acquired 33,500 — 33,500 Goodwill $ 6,183 $ 1,586 $ 7,769 The pro forma financial information for fiscal year 2017, including revenue and net income, is immaterial, and has not been separately presented.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Jun. 29, 2018
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS Divested Business On May 10, 2018, we completed the sale and transfer of certain assets associated with our Japan-based long-range optical subassembly business (the “LR4 business”), pursuant to an Asset Purchase and Intellectual Property License Agreement, dated April 30, 2018 (the “LR4 Agreement”). The LR4 Agreement provided that the buyer would pay us $5.0 million within 30 days following the closing of the transactions contemplated by the LR4 Agreement, provide us with the opportunity to supply components, and would pay us further amounts to be determined for inventory and fixed assets within 60 days of receipt of required government approvals. As of June 29, 2018 , we have received $5.0 million of consideration and expect additional consideration before the end of calendar 2018 of $12.3 million of which $7.3 million has been recorded as other current assets and $5.0 million has been recorded as assets held for sale. As a result of the transaction, during our third fiscal quarter we recorded a loss on disposal of $34.0 million associated with LR4 business as other expense, comprised of expected proceeds of $17.3 million , subject to receipt of required government approvals, less the carrying value of assets sold, primarily including customer relationship intangible assets of $27.7 million , inventory of $13.1 million , fixed assets of $7.6 million and goodwill of $2.6 million . The transaction did not meet the criteria of discontinued operations. We also entered into a Transition Services Agreement (the "LR4 TSA") with the buyer, pursuant to which we agreed to incur up to $2.0 million of operating expenses for certain ongoing administrative services to support the buyer for up to six months after the closing of the transaction. During the three and nine months ended June 29, 2018 , we have incurred $0.4 million of expenses associated with the LR4 TSA. Discontinued Operations On October 27, 2017, we entered into a purchase agreement to sell the Compute business. In consideration for the transfer and sale of the Compute business, we received an equity interest in the buyer valued at approximately $36.5 million , and representing less than 20.0% of the buyer's total outstanding equity. The operations of the Compute business were accounted for as discontinued operations through the date of divestiture. We also entered into a transition services agreement (the "Compute TSA"), pursuant to which we agreed to perform certain primarily general and administrative functions on the buyer's behalf during a migration period and for which we are reimbursed for costs incurred. During the three and nine months ended June 29, 2018 , we received $1.0 million and $3.5 million , respectively, of reimbursements under the Compute TSA, which were recorded as a reduction of our general and administrative expenses. In August 2015, we sold our automotive business (the "Automotive business"), as the Automotive business was not consistent with our long-term strategic vision from both a growth and profitability perspective. Additionally, we entered into a Consulting Agreement with the buyer (the "Consulting Agreement"), pursuant to which we were to provide the buyer with certain non-design advisory services for a period of two years following the closing of the transaction for up to $15.0 million . During the three and nine months ended June 30, 2017 , we recognized $1.9 million and $5.6 million of income, respectively, from the Consulting Agreement with the buyer. During the fiscal quarter ended March 31, 2017, we also received $18.0 million , the full amount of the indemnification escrow. No income was recognized during the three and nine months ended June 29, 2018 . The accompanying consolidated statements of operations include the following operating results related to these discontinued operations (in thousands): Three Months Ended Nine Months Ended June 29, 2018 June 30, 2017 June 29, 2018 June 30, 2017 Revenue (1) $ — $ 35 $ — $ 294 Cost of revenue (1) — (278 ) (596 ) 1,342 Gross profit — 313 596 (1,048 ) Operating expenses: Research and development (1) 175 10,611 4,873 18,936 Selling, general and administrative (1) 45 5,277 1,560 12,021 Total operating expenses 220 15,888 6,433 30,957 Loss from operations (220 ) (15,575 ) (5,837 ) (32,005 ) Other income (2) — 1,875 — 5,625 Gain on sale (2) — — — 18,022 Loss before income taxes (220 ) (13,700 ) (5,837 ) (8,358 ) Income tax provision — — — — Loss from discontinued operations $ (220 ) $ (13,700 ) $ (5,837 ) $ (8,358 ) Cash flow from operating activities (29 ) (12,312 ) (10,356 ) (41,384 ) Cash flow from investing activities — 1,875 — 23,645 (1) Amounts are associated with the Compute business. (2) Amounts are associated with the Automotive business.

Short Term Investments

Short Term Investments	9 Months Ended
	Jun. 29, 2018
Investments, Debt and Equity Securities [Abstract]
Investments	INVESTMENTS Our short-term investments are invested in corporate bonds and commercial paper, and are classified as available-for-sale. The amortized cost, gross unrealized holding gains or losses, and fair value of our investments by major investment type as of June 29, 2018 and September 29, 2017 are summarized in the tables below (in thousands): June 29, 2018 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 28,726 $ — $ (602 ) $ 28,124 Commercial paper 69,641 — (42 ) 69,599 Total short-term investments $ 98,367 $ — $ (644 ) $ 97,723 September 29, 2017 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 26,366 $ 10 $ (166 ) $ 26,210 Commercial paper 57,943 4 (36 ) 57,911 Total short-term investments $ 84,309 $ 14 $ (202 ) $ 84,121 The contractual maturities of investments were as follows (in thousands): June 29, 2018 September 29, 2017 Less than 1 year $ 70,848 $ 60,433 Over 1 year 26,875 23,688 Total short-term investments $ 97,723 $ 84,121 Available-for-sale investments are reported at fair value and as such, their associated unrealized gains and losses are reported as a separate component of stockholders’ equity within accumulated other comprehensive income. Other Investments — As of June 29, 2018 , we held two non-marketable equity investments classified as other long-term investments. One of these is an investment in a Series B preferred stock ownership of a privately held manufacturing corporation with preferred liquidation rights over other equity shares. This investment had a value of $5.0 million at the date of purchase and approximates the current fair value. Since we do not have the ability to exercise significant influence or control over the investment we hold this investment at cost, which we evaluate for impairment at each balance sheet date and through June 29, 2018 no impairment has been recorded for this investment. In addition, we have a minority investment of less than 20.0% of the outstanding equity of a privately held limited liability corporation ("Compute"). This investment was acquired in conjunction with the divestiture of the Compute business during the fiscal quarter ended December 29, 2017 and had an initial value of $36.5 million . We have no obligation to provide further funding to Compute. This investment value is updated quarterly based on our proportionate share of the losses or earnings of Compute utilizing the equity method. During the three and nine months ended June 29, 2018 we recorded a $3.1 million loss and a $7.2 million loss, respectively, associated with this investment as other expense in our consolidated statements of operations. As of June 29, 2018 , the carrying value of this investment is $29.3 million .

Fair Value

Fair Value	9 Months Ended
	Jun. 29, 2018
Fair Value Disclosures [Abstract]
Fair Value	FAIR VALUE We group our financial assets and liabilities measured at fair value on a recurring basis in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: Level 1 - Quoted prices in active markets for identical assets or liabilities. Level 2 - Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets with insufficient volume or infrequent transactions (less active markets), or model-driven valuations in which all significant inputs are observable or can be derived principally from, or corroborated with, observable market data. Level 3 - Fair value is derived from valuation techniques in which one or more significant inputs are unobservable, including assumptions and judgments made by us. Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis We measure certain assets and liabilities at fair value on a recurring basis such as our financial instruments and derivatives. There have been no transfers between Level 1, 2 or 3 assets or liabilities during the three and nine months ended June 29, 2018 . Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands): June 29, 2018 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 97 $ 97 $ — $ — Commercial paper 69,599 — 69,599 — Corporate bonds 28,124 — 28,124 — Total assets measured at fair value $ 97,820 $ 97 $ 97,723 $ — Liabilities Contingent consideration $ 510 $ — $ — $ 510 Common stock warrant liability 15,880 — — 15,880 Total liabilities measured at fair value $ 16,390 $ — $ — $ 16,390 September 29, 2017 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 36 $ 36 $ — $ — Commercial paper 57,911 — 57,911 — Corporate bonds 26,210 — 26,210 — Total assets measured at fair value $ 84,157 $ 36 $ 84,121 $ — Liabilities Contingent consideration $ 1,679 $ — $ — $ 1,679 Common stock warrant liability 40,775 — — 40,775 Total liabilities measured at fair value $ 42,454 $ — $ — $ 42,454 As of June 29, 2018 and September 29, 2017 , the fair value of the common stock warrants has been estimated using a Black-Scholes option pricing model. The quantitative information utilized in the fair value calculation of our Level 3 liabilities is as follows: Inputs Liabilities Valuation Technique Unobservable Input June 29, 2018 September 29, 2017 Contingent consideration Discounted cash flow Discount rate 9.2% 9.2% Probability of achievement 80% 70% - 100% Timing of cash flows 2 months 2 - 8 months Warrant liability Black-Scholes model Volatility 58.6% 44.9% Discount rate 2.52% 1.62% Expected life 2.5 years 3.2 years Exercise price $14.05 $14.05 Stock price $23.04 $44.61 Dividend rate —% —% The fair values of the contingent consideration liabilities were estimated based upon a risk-adjusted present value of the probability-weighted expected payments by us. Specifically, we considered base, upside and downside scenarios for the operating metrics upon which the contingent payments are to be based. Probabilities were assigned to each scenario and the probability weighted payments were discounted to present value using risk-adjusted discount rates. The changes in liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): September 29, Net Realized/Unrealized Gains Included in Earnings Purchases and Issuances Sales and Settlements June 29, Contingent consideration $ 1,679 $ (469 ) $ — $ (700 ) $ 510 Common stock warrant liability $ 40,775 $ (24,895 ) $ — $ — $ 15,880 September 30, Net Realized/Unrealized Losses Included in Earnings Purchases and Issuances Sales and Settlements June 30, Contingent consideration $ 848 $ 46 $ 1,701 $ (400 ) $ 2,195 Common stock warrant liability $ 38,253 $ 16,481 $ — $ — $ 54,734

Inventories

Inventories	9 Months Ended
	Jun. 29, 2018
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories, net of reserves, consist of the following (in thousands): June 29, September 29, Raw materials $ 69,803 $ 78,999 Work-in-process 13,976 13,962 Finished goods 39,087 43,113 Total inventory, net $ 122,866 $ 136,074

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Jun. 29, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consists of the following (in thousands): June 29, September 29, Construction in process $ 35,645 $ 22,195 Machinery and equipment 173,433 160,955 Leasehold improvements 13,358 13,809 Furniture and fixtures 2,513 2,078 Computer equipment and software 17,086 16,539 Capital lease assets 19,983 20,410 Total property and equipment $ 262,018 $ 235,986 Less accumulated depreciation and amortization (122,603 ) (104,967 ) Property and equipment, net $ 139,415 $ 131,019 Depreciation and amortization expense related to property, plant and equipment for the three and nine months ended June 29, 2018 was $7.7 million and $23.0 million , respectively. Depreciation and amortization expense related to property, plant and equipment for the three and nine months ended June 30, 2017 was $6.5 million and $19.7 million , respectively.

Debt

Debt	9 Months Ended
	Jun. 29, 2018
Debt Disclosure [Abstract]
Debt	DEBT As of June 29, 2018 , we are party to a credit agreement dated as of May 8, 2014 with a syndicate of lenders and Goldman Sachs Bank USA ("Goldman Sachs"), as administrative agent (as amended on February 13, 2015, August 31, 2016, March 10, 2017, May 19, 2017, May 2, 2018 and May 9, 2018, the “Credit Agreement”). On May 2, 2018, we entered into an amendment to our Credit Agreement (the “May 2nd Amendment”) with the lenders party thereto and Goldman Sachs, as the administrative agent. The amendment extended the maturity of $130.0 million of borrowing availability under our existing revolving credit facility (“Revolving Facility”) until November 2021, with the remaining $30.0 million of borrowing availability maturing in May 2019. Prior to the amendment, the entire $160.0 million of the Revolving Facility borrowing availability was scheduled to mature in May 2019. On May 9, 2018, we entered into another amendment to our Credit Agreement (the “May 9th Amendment”, together with the May 2nd Amendment, the "May 2018 Amendments") with the lenders party thereto and Goldman Sachs, as the administrative agent. The amendment extended the maturity of the remaining $30 million of commitments comprising the aggregate $160 million of borrowing availability under our existing Revolving Facility until November 2021. As of June 29, 2018 , the Credit Agreement consisted of term loans with an aggregate principal amount of $700.0 million (“Term Loans”) and a revolving credit facility with an aggregate borrowing capacity of $160.0 million . The Revolving Facility will mature in November 2021 and the Term Loans will mature in May 2024 and bear interest at: (i) for LIBOR loans for any interest period, a rate per annum equal to the LIBOR rate as determined by the administrative agent, plus an applicable margin of 2.25% ; and (ii) for base rate loans, a rate per annum equal to the greater of (a) the prime rate quoted in the print edition of the Wall Street Journal, Money Rates Section, (b) the federal funds rate plus one-half of 1.00% and (c) the LIBOR rate applicable to a one-month interest period plus 1.00% (but, in each case, not less than 1.00% ), plus an applicable margin of 1.25% . All principal amounts outstanding and interest rate information as of June 29, 2018 , for the Credit Agreement were as follows (in millions, except rate data): Principal Outstanding LIBOR Rate Margin Effective Interest Rate Term loans $681.6 2.09% 2.25% 4.34% We incurred $0.5 million in fees in connection with the May 2018 Amendments, which were recorded as deferred financing costs and are being amortized over the life of the Revolving Facility as interest expense. As of June 29, 2018 , approximately $11.6 million of deferred financing costs remain unamortized, of which $10.6 million is related to the Term Loans and is recorded as a direct reduction of the recognized debt liabilities in our accompanying consolidated balance sheet, and $1.0 million is related to the Revolving Facility and is recorded in other long-term assets in our accompanying consolidated balance sheet. The Term Loans and Revolving Facility are secured by a first priority lien on substantially all of our assets and provide that we must comply with certain financial and non-financial covenants. As of June 29, 2018 , we had $160.0 million of borrowing capacity under our Revolving Facility. As of June 29, 2018 , the following remained outstanding on the Term Loans (in thousands): Principal balance $ 681,577 Unamortized discount (4,927 ) Unamortized deferred financing costs (10,619 ) Total term loans $ 666,031 Current portion 6,885 Long-term, less current portion $ 659,146 As of June 29, 2018 , the minimum principal payments under the Term Loans in future fiscal years were as follows (in thousands): 2018 (rest of fiscal year) $ 1,721 2019 6,885 2020 6,885 2021 6,885 2022 6,885 Thereafter 652,316 Total $ 681,577 The fair value of the Term Loans was estimated to be approximately $690.9 million as of June 29, 2018 and was determined using Level 2 inputs, including a quoted rate from a bank.

Capital Lease and Financing Obl

Capital Lease and Financing Obligations Capital Lease and Financing Obligations	9 Months Ended
	Jun. 29, 2018
Leases [Abstract]
Capital Lease Obligations	9. CAPITAL LEASE AND FINANCING OBLIGATIONS Corporate Facility Financing Obligation On May 26, 2016, we entered into a Purchase and Sale Agreement (the “Purchase and Sale Agreement”) with Calare Properties, Inc. (together with its affiliates, “Calare”), for the sale and subsequent leaseback of our corporate headquarters, located at 100 Chelmsford Street, Lowell, Massachusetts. The transactions contemplated by the Purchase and Sale Agreement closed on December 28, 2016, at which time we also entered into three lease agreements with Calare including: (1) a 20 year leaseback of the facility located at 100 Chelmsford Street (the “100 Chelmsford Lease”), (2) a 20 year build-to-suit lease arrangement for the construction and subsequent lease back of a new facility to be located at 144 Chelmsford Street (the “144 Chelmsford Lease”), and (3) a 14 year building lease renewal of an adjacent facility at 121 Hale Street (the “121 Hale Lease”, and together with the 100 Chelmsford Lease and the 144 Chelmsford Lease, the “Leases”). Because the transactions contemplated by the Purchase and Sale Agreement and the related Leases were negotiated and consummated at the same time and in contemplation of one another to achieve the same commercial objective, the transactions are accounted for by us as a single unit of accounting. In addition, the Leases were determined to represent a failed sale-leaseback due to our continuing involvement in the properties in the form of non-recourse financing. As a result, the Leases are accounted for under the financing method and we will be deemed the accounting owner under the arrangement, including the assets to be constructed under the 144 Chelmsford Lease. We will continue to recognize the existing building and improvements sold under the Purchase and Sale Agreement, capitalize the 121 Hale Street building as well as the assets constructed under the Leases, and depreciate the assets over the shorter of their estimated useful lives or the lease terms. The sale proceeds from the Purchase and Sale Agreement of $8.2 million (which includes $4.2 million in cash and $4.0 million in construction allowances) and the fair value of the 121 Hale Street building of $4.0 million were recognized as a financing obligation, which is included in lease payable on our consolidated balance sheet, and are being amortized over the 20 year lease term based on the minimum lease payments required under the Leases and our incremental borrowing rate. Future construction costs funded by Calare under the 144 Chelmsford Lease will be recognized as additional financing obligations on our consolidated balance sheet as incurred, and will be amortized over the 20 year lease term based on the minimum lease payments required under the Leases and our incremental borrowing rate when the building is placed into service. As a result of the failed sale-leaseback accounting, we calculated a financing obligation based on the future minimum lease payments discounted at 8.6% as of June 29, 2018 . The discount rate represents the estimated incremental borrowing rate over the lease term of 20 years. The minimum lease payments are recorded as interest expense and in part as a payment of principal reducing the financing obligation. The real property assets in the transaction remain on the consolidated balance sheets and continue to be depreciated over the remaining useful lives. As of June 29, 2018 , approximately $26.0 million of the financing obligation was outstanding associated with the Leases, of which $13.9 million was associated with the 144 Chelmsford Lease that has not yet been placed in service. Additionally, we have certain capital equipment lease obligations, of which approximately $1.1 million was outstanding as of June 29, 2018 . As of June 29, 2018 , future minimum payments under capital lease obligations and financing obligations related to the Leases were as follows (in thousands): Fiscal year ending: Amount 2018 (rest of fiscal year) $ 399 2019 1,529 2020 1,471 2021 1,374 2022 1,211 Thereafter 20,457 Total minimum capital lease payments 26,441 Less amount representing interest (14,970 ) Present value of net minimum capital lease payments (1) $ 11,471

Intangible Assets

Intangible Assets	9 Months Ended
	Jun. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	INTANGIBLE ASSETS Amortization expense related to intangible assets is as follows (in thousands): Three Months Ended Nine Months Ended June 29, June 30, June 29, June 30, Cost of revenue $ 8,594 $ 8,416 $ 24,913 $ 21,694 Selling, general and administrative 13,081 10,833 35,827 24,463 Total $ 21,675 $ 19,249 $ 60,740 $ 46,157 Intangible assets consist of the following (in thousands): June 29, September 29, Acquired technology $ 251,811 $ 251,655 Customer relationships 518,233 556,648 Trade name 3,400 3,400 Total $ 773,444 $ 811,703 Less accumulated amortization (239,568 ) (190,611 ) Intangible assets — net $ 533,876 $ 621,092 Our trade name is an indefinite-lived intangible asset. A summary of the activity in intangible assets and goodwill follows (in thousands): Intangible Assets Total Intangible Assets Acquired Technology Customer Trade Name Goodwill Balance at September 29, 2017 $ 811,703 $ 251,655 $ 556,648 $ 3,400 $ 313,765 Allocation to divested business (39,285 ) — (39,285 ) — (2,560 ) Fair value adjustment — — — — 2,790 Currency translation adjustment 1,026 156 870 — 406 Balance at June 29, 2018 $ 773,444 $ 251,811 $ 518,233 $ 3,400 $ 314,401 As of June 29, 2018 , our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands): 2018 Remaining 2019 2020 2021 2022 Thereafter Total Amortization expense $ 20,953 83,796 81,706 74,089 61,851 208,081 $ 530,476 Accumulated amortization for acquired technology and customer relationships were $131.5 million and $108.1 million , respectively, as of June 29, 2018 , and $106.8 million and $83.9 million , respectively, as of September 29, 2017 .

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Jun. 29, 2018
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY We have authorized 10 million shares of $0.001 par value preferred stock and 300 million shares of $0.001 par value common stock as of June 29, 2018 and September 29, 2017 . Common Stock Warrants —In March 2012, we issued warrants to purchase 1,281,358 shares of common stock for $14.05 per share. The warrants expire December 21, 2020 , or earlier as per the terms of the agreement, including immediately following consummation of a sale of all or substantially all assets or capital stock or other equity securities, including by merger, consolidation, recapitalization or similar transactions. We do not currently have sufficient registered and available shares to immediately satisfy a request for registration, if such a request were made. As of June 29, 2018 , no exercise of the warrants had occurred, and no request had been made to register the warrants or any underlying securities for resale by the holders. We are recording the estimated fair values of the warrants as a long-term liability in the accompanying consolidated financial statements with changes in the estimated fair value being recorded in the accompanying statements of operations. See Note 5 - Fair Value for additional information related to the fair value of our warrant liability.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	9 Months Ended
	Jun. 29, 2018
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	EARNINGS (LOSS) PER SHARE 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 Nine Months Ended June 29, 2018 June 30, 2017 June 29, 2018 June 30, 2017 Numerator: Loss from continuing operations $ (85,210 ) $ (13,977 ) $ (117,647 ) $ (150,414 ) Loss from discontinued operations (220 ) (13,700 ) (5,837 ) (8,358 ) Net loss $ (85,430 ) $ (27,677 ) $ (123,484 ) $ (158,772 ) Warrant liability gain — — (24,895 ) — Net loss attributable to common stockholders $ (85,430 ) $ (27,677 ) $ (148,379 ) $ (158,772 ) Denominator: Weighted average common shares outstanding-basic 64,920 64,019 64,598 59,524 Dilutive effect of warrants — — 600 — Weighted average common shares outstanding-diluted 64,920 $ 64,019 $ 65,198 $ 59,524 Loss per share-basic: Continuing operations $ (1.31 ) $ (0.22 ) $ (1.82 ) $ (2.53 ) Discontinued operations 0.00 (0.21 ) (0.09 ) (0.14 ) Net loss to common stock holders per share-basic $ (1.32 ) $ (0.43 ) $ (1.91 ) $ (2.67 ) Loss per share-diluted: Continuing operations $ (1.31 ) $ (0.22 ) $ (2.19 ) $ (2.53 ) Discontinued operations 0.00 (0.21 ) (0.09 ) (0.14 ) Net loss to common stock holders per share-diluted $ (1.32 ) $ (0.43 ) $ (2.28 ) $ (2.67 ) As of June 29, 2018 , we had warrants outstanding which were reported as a liability on the consolidated balance sheet. During the nine months ended June 29, 2018 , we recorded a $24.9 million gain associated with adjusting the fair value of the warrants, in the consolidated statements of operations primarily as a result of changes in our stock price. When calculating earnings per share we are required to adjust for any changes in income or loss to show the maximum dilution possible, and therefore during the nine months ended June 29, 2018 we adjusted the numerator by the warrant gains of $24.9 million and denominator by the incremental shares of 600,192 under the treasury stock method. The table above excludes the effects of 724,885 shares for the three months ended June 29, 2018 of potential shares of common stock issuable upon exercise of stock options, warrants, restricted stock and restricted stock units as the inclusion would be antidilutive. The table also excludes the effects of 422,584 shares for the nine months ended June 29, 2018 of potential shares of common stock issuable upon exercise of stock options, restricted stock and restricted stock units as the inclusion would be antidilutive. The table above excludes the effects of 1,916,434 and 1,940,834 shares, respectively, for the three and nine months ended June 30, 2017 , of potential shares of common stock issuable upon exercise of stock options, warrants, restricted stock and restricted stock units as the inclusion would be antidilutive.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Jun. 29, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES From time to time, we may be subject to commercial disputes, employment issues, claims by other companies in the industry that we have infringed their intellectual property rights and other similar claims and litigations. Any such claims may lead to future litigation and material damages and defense costs. Other than as set forth below, we were not involved in any material pending legal proceedings during the fiscal quarter ended June 29, 2018 . GaN Lawsuit Against Infineon. On April 26, 2016, we and our wholly-owned subsidiary Nitronex, LLC brought suit against Infineon Technologies Americas Corporation ("Infineon Americas") and Infineon Technologies AG ("Infineon AG" and collectively, with Infineon Americas, "Infineon") in the Federal District Court for the Central District of California, seeking injunctive relief, monetary damages, and specific performance of certain contractual obligations. On July 19, 2016, we filed a first amended complaint, and, on November 21, 2016, we filed a second amended complaint. After motions to dismiss certain claims from MACOM’s second amended complaint were denied on February 28, 2017, Infineon AG answered on March 24, 2017, asserting no counterclaims. Infineon Americas also answered and counterclaimed on March 24, 2017 and then submitted amended counterclaims on April 14, 2017. The district court dismissed one of the counterclaims on June 5, 2017, and Infineon filed further amended counterclaims on June 19, 2017. MACOM answered the counterclaims on August 16, 2017. On March 14, 2018, MACOM filed a third amended complaint, which Infineon answered on March 28, 2018. On June 20, 2018, MACOM filed a fourth amended complaint. Infineon’s response is due on August 13, 2018. The suit arises out of agreements relating to GaN-on-Silicon ("GaN") patents that were executed in 2010 by Nitronex Corporation (acquired by us in 2014) and International Rectifier Corporation ("International Rectifier") (acquired by Infineon AG in 2015). We assert claims for breach of contract, breach of the covenant of good faith and fair dealing, declaratory judgment of contractual rights, declaratory judgment of non-infringement of patents, and, against Infineon AG only, intentional interference with contract and unfair competition. If successful, the relief sought would, among other remedies, require Infineon to assign back to us certain GaN-related Nitronex patents that were previously assigned to International Rectifier and enjoin Infineon from proceeding with its marketing and sales of certain types of GaN products. In an order dated October 31, 2016, the district court granted us a preliminary injunction against Infineon, which then issued on December 7, 2016 and was modified on March 6, 2017. The preliminary injunction declared, among other things, that a licensing agreement between us and Infineon that Infineon had purported to terminate is still in effect. On January 29, 2018, the Federal Circuit affirmed the district court’s decision to enter a preliminary injunction declaring the license agreement to still be in effect, although it reversed other aspects of the district court’s decision. Meanwhile, the district court case has been proceeding, and trial is set to begin on May 7, 2019. With respect to the above legal proceeding, we are not able to reasonably estimate the amount or range of any possible loss, and accordingly have not accrued or disclosed any related amounts of possible loss in the accompanying consolidated financial statements.

Restructurings

Restructurings	9 Months Ended
	Jun. 29, 2018
Restructuring and Related Activities [Abstract]
Restructurings	RESTRUCTURINGS We have periodically implemented restructuring actions in connection with broader plans to reduce staffing, reduce our internal manufacturing footprint and generally reduce operating costs. The restructuring expenses are primarily comprised of direct and incremental costs related to headcount reductions including severance and outplacement fees for the terminated employees, as well as facility closure costs. During the fiscal quarter ended December 29, 2017, we initiated plans to restructure our facility in Long Beach, California and to close our facilities in Belfast, the United Kingdom and Sydney, Australia. As of June 29, 2018, the operations from the Long Beach facility have been consolidated into our other California locations in order to achieve operational synergies. The Belfast and Sydney facilities have been closed as we have discontinued certain product development activities that were performed in those locations. We do not expect to incur any additional restructuring costs associated with these facilities. The following is a summary of the restructuring charges incurred for the three and nine months ended June 29, 2018 under these restructuring plans (in thousands): Three Months Ended Nine Months Ended June 29, June 30, June 29, June 30, Employee related expenses $ 4 $ 586 $ 2,796 $ 2,342 Facility related expenses 98 — 3,506 — Total restructuring charges $ 102 $ 586 $ 6,302 $ 2,342 The following is a summary of the costs incurred for the nine months ended June 29, 2018 and the remaining balances included in accrued expenses at June 29, 2018 (in thousands): Balance as of September 29, 2017 $ 627 Current period expense 6,302 Charges paid/settled (6,131 ) Balance as of June 29, 2018 $ 798 As described in Note 20 - Subsequent Events , we have committed to a plan to exit certain production and product lines including certain production facilities located in Ithaca, New York. There were no restructuring charges incurred as of June 29, 2018 for these facilities, and we expect to incur restructuring costs of approximately $4.9 million to $6.2 million during the remainder of calendar year 2018 as we complete these restructuring actions.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Jun. 29, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Stock Plans As of June 29, 2018 , we had 14.1 million shares available for issuance under our 2012 Omnibus Incentive Plan (as Amended and Restated) (the “2012 Plan”) and 3.2 million shares available for issuance under our Employee Stock Purchase Plan. Under the 2012 Plan, we have the ability to issue incentive stock options (“ISOs”), non-statutory stock options (“NSOs”), performance based non-statutory stock options, stock appreciation rights, restricted stock (“RSAs”), restricted stock units (“RSUs”), performance-based restricted stock units (“PRSUs”), performance shares and other equity-based awards to employees, directors and outside consultants. The ISOs and NSOs must be granted at a price per share not less than the fair value of our common stock on the date of grant. Options granted to date primarily vest based on certain market-based and performance-based criteria. Options granted generally have a term of seven to ten years. Certain of the share-based awards granted and outstanding as of June 29, 2018 are subject to accelerated vesting upon a change in control. There were no material modifications to share-based awards during the periods presented. Share-Based Compensation The following table shows a summary of share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three and nine months ended June 29, 2018 and June 30, 2017 (in thousands): Three Months Ended Nine Months Ended June 29, June 30, June 29, June 30, Cost of revenue $ 1,019 $ 846 $ 2,881 $ 2,245 Research and development 3,785 3,006 10,422 7,677 Selling, general and administrative 3,950 6,083 10,792 17,744 Total share-based compensation expense $ 8,754 $ 9,935 $ 24,095 $ 27,666 As of June 29, 2018 , the total unrecognized compensation costs related to outstanding stock options, restricted stock awards and units including awards with time-based and performance-based vesting was $58.7 million , which we expect to recognize over a weighted-average period of 2.5 years. As of June 29, 2018 , total unrecognized compensation cost related to our Employee Stock Purchase Plan was $1.0 million . Stock Options We had 1.4 million stock options outstanding as of June 29, 2018 , with a weighted-average exercise price per share of $31.92 and weighted-average remaining contractual term of 5.1 years . The aggregate intrinsic value of the stock options outstanding as of June 29, 2018 was $2.5 million which represents our closing stock price value on the last trading day of the period in excess of the weighted-average exercise price multiplied by the number of options outstanding. We had 0.4 million stock options exercisable as of June 29, 2018 , with a weighted-average exercise price per share of $19.12 and weighted-average remaining contractual term of 3.9 years . The aggregate intrinsic value of the stock options exercisable as of June 29, 2018 was $2.5 million which represents our closing stock price value on the last trading day of the period in excess of the weighted-average exercise price multiplied by the number of options exercisable. During November 2017, we granted 325,000 non-qualified stock options with a grant date fair value of $5.0 million that are subject to vesting only upon the market price of our underlying public stock closing above a certain price target within seven years of the date of grant. These non-qualified stock options with market related vesting conditions are valued using a Monte Carlo simulation model, using a volatility rate of 45.8% , a risk-free rate of 2.26% , a weighted-average strike price of $36.58 and a term of seven years . Share-based compensation expense is recognized regardless of the number of awards that are earned based on the market condition and is recognized on a straight-line basis over the estimated service period of approximately three years . If the required service period is not met for these options, then the share-based compensation expense would be reversed. In the event that our common stock achieves the target price of $98.99 per share based on a 30 days trailing average prior to the end of the estimated service period, any remaining unamortized compensation cost will be recognized. During November 2017, we also granted 10,924 incentive stock options and 69,076 non-qualified stock options with a total grant date fair value of $1.4 million . These stock options are valued using a Black Scholes model, using a volatility rate of 45.7% , a risk-free rate of 2.21% , a strike price of $36.61 and an expected term of 6.5 years . Share-based compensation expense is recognized on a straight-line basis over the service period of approximately 4.5 years. If the required service period is not met for these options, then the share-based compensation expense would be reversed. The total intrinsic value of options exercised for the three months ended June 29, 2018 was not material. The total intrinsic value of options exercised for the nine months ended June 29, 2018 was $0.7 million , and was $6.3 million and $8.2 million for the three and nine months ended June 30, 2017 , respectively. Restricted Stock, Restricted Stock Units and Performance-Based Restricted Stock Units A summary of restricted stock, restricted stock unit and performance-based restricted stock unit activity for the nine months ended June 29, 2018 , is as follows (in thousands, except per share data): Number of RSAs, RSUs and PRSUs Weighted- Average Grate Date Fair Value Aggregate Intrinsic Value (in thousands) Balance at September 29, 2017 1,907 $ 39.20 $ 72,165 Granted 1,067 26.91 Vested and released (883 ) 35.29 Forfeited, canceled or expired (217 ) 34.54 Balance at June 29, 2018 1,874 $ 34.59 $ 43,029 Restricted stock, restricted stock units and performance-based restricted stock units that vested during the nine months ended June 29, 2018 and June 30, 2017 had fair value of $19.2 million and $46.8 million , respectively, as of the vesting date.

Income Taxes

Income Taxes	9 Months Ended
	Jun. 29, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES We are subject to income tax in the U.S. as well as other tax jurisdictions in which we conduct 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, we record 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 our effective income tax rate for the three and nine months ended June 30, 2017 , was primarily driven by the establishment of a valuation allowance against our U.S. deferred tax assets. For the fiscal year ending September 28, 2018, our blended U.S. federal income tax rate is expected to be 24.5% . The difference between the U.S. federal statutory income tax rate of 24.5% and our effective income tax rate for the three and nine months ended June 29, 2018 was primarily impacted by a full valuation allowance against any benefit associated with U.S. losses and income taxed in foreign jurisdictions at generally lower tax rates. We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making this determination, we consider available positive and negative evidence and factors that may impact the valuation of our deferred tax asset including results of recent operations, future reversals of existing taxable temporary differences, projected future taxable income, and tax-planning strategies. A significant piece of objective negative evidence evaluated was the cumulative U.S. loss initially incurred over the three-year period ended March 31, 2017, which we believe limited our ability to consider other subjective evidence, such as our projections for future growth. Certain transaction and integration related expenses incurred in the U.S. primarily associated with the AppliedMicro Acquisition during the three months ended March 31, 2017 resulted for the first time in significant negative objective evidence in the form of adjusted cumulative losses in the U.S. over the past three-year period. This resulted in our determination during the fiscal quarter ended March 31, 2017 that there was not sufficient objectively verifiable positive evidence to offset this negative objective evidence and we concluded that a full valuation allowance was required for our U.S. deferred tax assets. Significant negative objective evidence in the form of adjusted cumulative losses in the U.S. over the past three-year period ended June 29, 2018 resulted in our continued determination that there was not sufficient objectively verifiable positive evidence to offset this negative objective evidence and we concluded that a full valuation allowance was still appropriate for our U.S. deferred tax assets. The balance of the unrecognized tax benefit as of June 29, 2018 and September 29, 2017 was $0.3 million and $1.7 million , respectively. The decrease of $1.4 million was primarily the result of an audit settlement of our 2014 U.S. tax filings during the three months ended March 30, 2018. The unrecognized tax benefits as of June 29, 2018 primarily relate to positions taken by us in our foreign tax filings. The entire balance of unrecognized tax benefits, if recognized, will reduce income tax expense. It is our policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During the fiscal quarters ended June 29, 2018 and September 29, 2017 , we did not make any accrual or payment of interest and penalties. On December 22, 2017, the U.S. Congress enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act makes broad and complex changes to the U.S. tax code, including, but not limited to: • reducing the highest marginal U.S. federal corporate income tax rate from 35% in the period ending December 29, 2017 to 21% , effective January 1, 2018; • requiring companies to become liable for a one-time deemed repatriation transition tax (“Transition Tax”) based on previously untaxed accumulated and current earnings and profits (“E&P”) of certain foreign subsidiaries for our fiscal year ending September 28, 2018; • generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries that would apply to our fiscal year beginning September 29, 2018; • requiring the inclusion of certain income such as Global Intangible Low Taxed Income (“GILTI”) earned by controlled foreign corporations (“CFCs”) in our U.S. federal taxable income that would apply to our fiscal year beginning September 29, 2018; • eliminating the corporate alternative minimum tax (“AMT”) and changing how existing AMT credits can be realized that would apply to our fiscal year beginning September 29, 2018; • repealing the performance-based compensation exception to the section 162(m) $1.0 million deduction limitation and revising the definition of a covered employee for our fiscal year beginning September 29, 2018; • creating the base erosion anti-abuse tax, a new minimum tax that would apply to our fiscal year beginning September 29, 2018; • creating a new limitation on deductible interest expense that would apply to our fiscal year beginning September 29, 2018; • limiting the degree to which net operating losses can be utilized against taxable income that would apply to losses created beginning with our fiscal year beginning September 29, 2018; • changing rules related to the ability to apply net operating losses against later or earlier tax years that would apply to losses created beginning with our fiscal year beginning September 30, 2017; and • an increase in the allowable deduction for costs to acquire qualified property placed into service after September 27, 2017. Based on preliminary calculations, we currently estimate that our financial results for the fiscal year ending September 28, 2018 will include a non-cash reduction in income tax expense of approximately $3.7 million resulting primarily from the re-measurement of our U.S. deferred tax liabilities to reflect the new 21% U.S. federal tax rate. To determine the amount of the Transition Tax, we must determine, in addition to other factors, the amount of E&P of the relevant subsidiaries as well as the amount of non-U.S. income taxes paid on such earnings. We were able to make a reasonable estimate of the Transition Tax and have determined that we expect to have sufficient net operating losses to reduce any cash tax payments associated with the one-time repatriation of E&P down to the alternative minimum tax, which we estimate to be less than $1.0 million . On a preliminary basis we have estimated the one-time repatriation of E&P would result in a release of the valuation allowance corresponding with utilization of our U.S. Net Operating Loss ("NOL"), resulting in no impact to our tax expense for the nine months ended June 29, 2018 . We are continuing to analyze additional information to more precisely compute the amount of the Transition Tax. The Tax Act creates a new requirement that certain income such as GILTI earned by CFCs must be included in the gross income of the CFCs’ U.S. shareholder. GILTI is the excess of the shareholder's net CFC tested income over the net deemed tangible income return, which is currently defined as the excess of (1) 10 percent of the aggregate of the U.S. shareholder’s pro rata share of the qualified business asset investment of each CFC with respect to which it is a U.S. shareholder over (2) the amount of certain interest expense taken into account in the determination of net CFC-tested income. The Company must assess whether its valuation allowance analyses are affected by various aspects of the Tax Act (e.g., the Transition Tax, GILTI inclusions and new categories of foreign tax credits). The changes included in the Tax Act are broad and complex. Although we are not able to finalize our evaluation of the impact of the Tax Act at this time due to uncertainties related to any future legislative or regulatory actions related to the Tax Act and availability of information needed to perform the final calculations, we do believe that a full valuation allowance continues to be required. However, we will continue to evaluate the impact the Tax Act may have on our financial statements including the impact on our full valuation allowance against our U.S. deferred tax assets and any impact this would have on our tax expense. The SEC has issued Staff Accounting Bulletin No. 118 that would allow for a measurement period of up to one year after the enactment date of the Tax Act to finalize the application of Accounting Standards Codification Topic 740, Income Taxes . We currently anticipate finalizing and recording any resulting adjustments by the end of our current fiscal year ending September 28, 2018.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Jun. 29, 2018
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Cadence Design Systems, Inc. ("Cadence") provides us with certain engineering licenses on an ongoing basis. Geoffrey Ribar, who joined our Board of Directors on March 22, 2017, served as an officer of Cadence through September 30, 2017 and served as a Senior Advisor to Cadence until March 31, 2018. Through the nine months ended June 29, 2018 , we made payments of $4.1 million to Cadence prior to March 31, 2018. During the three and nine months ended June 30, 2017 , we made payments of $3.2 million and $4.7 million , respectively, to Cadence subsequent to Mr. Ribar joining our Board of Directors.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	9 Months Ended
	Jun. 29, 2018
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION As of June 29, 2018 and June 30, 2017 , we had $2.8 million and $0.9 million , respectively, in unpaid amounts related to purchases of property and equipment included in accounts payable and accrued liabilities during each period. 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. During the nine months ended June 29, 2018 and June 30, 2017 , we capitalized $16.5 million and $1.3 million , respectively, of net construction costs relating to the 144 Chelmsford Street facility, of which $10.8 million and $1.3 million , respectively, were accounted for as a non-cash transaction as the costs were paid by the developer. During the nine months ended June 29, 2018 , we divested the Compute business with net assets valued at approximately $36.5 million in exchange for a $36.5 million equity interest in Compute. During the three and nine months ended June 29, 2018 , we recorded $3.1 million and $7.2 million , respectively, of losses associated with this investment based on our proportionate share of the losses of Compute. In January 2017, we issued common stock with a fair value of $465.1 million in connection with the AppliedMicro Acquisition. This was accounted for as a non-cash transaction as no shares were purchased or sold as part of the transaction. The following is supplemental cash flow information regarding non-cash investing and financing activities (in thousands): Nine Months Ended June 29, June 30, Cash paid for interest $ 21,804 $ 23,260 Cash paid (refunded) for income taxes $ 3,435 $ (548 )

Geographic and Significant Cust

Geographic and Significant Customer Information	9 Months Ended
	Jun. 29, 2018
Segment Reporting [Abstract]
Geographic and Significant Customer Information	GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION We have one reportable operating segment that 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 our operations in different geographic regions, based upon customer locations, is presented below (in thousands): Three Months Ended Nine Months Ended Revenue by Geographic Region June 29, June 30, June 29, June 30, United States $ 67,861 $ 82,637 $ 197,540 $ 192,821 China 39,016 51,191 115,068 168,026 Asia Pacific, excluding China (1) 17,795 43,756 64,028 129,298 Other Countries (2) 13,200 16,971 42,574 42,246 Total $ 137,872 $ 194,555 $ 419,210 $ 532,391 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Australia, Malaysia, New Zealand, the Philippines and Vietnam. (2) No international country or region represented greater than 10% of the total revenue as of the dates presented, other than China and the Asia Pacific region as presented above. As of Long-Lived Assets by Geographic Region June 29, September 29, United States $ 111,199 $ 101,044 Asia Pacific (1) 25,754 24,945 Other Countries (2) 2,462 5,030 Total $ 139,415 $ 131,019 (1) Asia Pacific represents Taiwan, India, Japan, Thailand, South Korea, Australia, Malaysia, New Zealand, the Philippines, Vietnam and China. (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 as presented above. 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 Nine Months Ended Revenue June 29, June 30, June 29, June 30, Customer A 14 % 10 % 12% 10% Customer B 8 % 10 % 8% 8% Customer C 5 % 5 % 6% 12% Accounts Receivable June 29, September 29, Customer A 18 % 13 % Customer D 19 % 14 % 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 and nine months ended June 29, 2018 , our top ten customers represented 59% and 55% of total revenue, respectively, and for the three and nine months ended June 30, 2017 , our top ten customers represented 51% and 55% of total revenue, respectively.

Subsequent Events Subsequent Ev

Subsequent Events Subsequent Events	9 Months Ended
	Jun. 29, 2018
Subsequent Events [Abstract]
Subsequent Events	20. SUBSEQUENT EVENTS

Summary of Significant Accoun28

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Jun. 29, 2018
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation— We have one reportable segment, semiconductors and modules. The accompanying consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Fiscal Period	We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. The fiscal years 2018 and 2017 include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we typically include the extra week arising in such fiscal years in the first quarter.
Use of Estimates	Use of Estimates —The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions.
Recent Accounting Pronouncements	Recent Accounting Pronouncements —Our Recent Accounting Pronouncements are described in the notes to our September 29, 2017 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 29, 2017 . In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers ("Topic 606"). In March, April, May and December 2016, the FASB issued additional guidance related to Topic 606. The new standard superseded nearly all existing revenue recognition guidance. Under Topic 606, an entity is required to recognize revenue upon transfer of promised goods or services to customers in an amount that reflects the expected consideration to be received in exchange for those goods or services. Topic 606 defines a five-step process in order to achieve this core principle, which may require the use of judgment and estimates, and also requires expanded qualitative and quantitative disclosures relating to the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including significant judgments and estimates used. The new standard also defines accounting for certain costs related to origination and fulfillment of contracts with customers, including whether such costs should be capitalized. The new standard permits adoption either by using (i) a full retrospective approach for all periods presented in the period of adoption or (ii) a modified retrospective approach where the new standard is applied in the financial statements starting with the year of adoption. Under both approaches, cumulative impact of the adoption is reflected as an adjustment to retained earnings (accumulated equity (deficit)) as of the earliest date presented in accordance with the new standard. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date , which delayed the effective date of the new standard from January 1, 2017 to January 1, 2018. We plan to implement the new guidance on September 29, 2018, the beginning of our next fiscal year, using the modified retrospective approach, applied to those contracts that were not completed as of that date. We developed a project plan for the implementation of the guidance, including a review of all revenue streams to identify any differences in the timing, measurement or presentation of revenue recognition and costs to obtain or fulfill the contracts. We have made progress in completing the assessment of the potential impacts of the standard, including any impacts from issued amendments. We do not expect the adoption of Topic 606 to have a material impact on our financial position and results of operations. As we continue our evaluation, we are also assessing any disclosure requirements and preparing to implement changes to accounting policies, business processes and internal controls to support the new standard. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation ("ASU 2016-09"), which simplifies several aspects of the accounting for employee share-based payment transactions for both public and nonpublic entities. We adopted this ASU as of September 30, 2017. Prior to ASU 2016-09, the accounting for share-based compensation required forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. ASU 2016-09 allows an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. ASU 2016-09 requires an entity that elects to account for forfeitures when they occur to apply the accounting change on a modified retrospective basis as a cumulative-effect adjustment to retained earnings as of the date of adoption. We elected to account for forfeitures when they occur, and recorded a $1.0 million cumulative-effect adjustment to beginning retained earnings as of September 30, 2017. We did not record any adjustments to retained earnings for the tax effect of the adoption of ASU 2016-09 as we are in a full valuation allowance position against our U.S. deferred tax asset. ASU 2016-09 requires all excess tax benefits and tax deficiencies to be recorded in the consolidated income statement on a prospective basis when the awards vest or are settled. Due to our full U.S. valuation allowance, ASU 2016-09 had no impact to our tax expense for the three and nine months ended June 29, 2018 .

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Jun. 29, 2018
Business Combinations [Abstract]
Summary of Acquisitions	The following table summarizes the total estimated acquisition consideration (in thousands): Cash consideration paid to AppliedMicro common stockholders $ 287,060 Common stock issued (9,544,125 shares of our common stock at $47.53 per share) 453,632 Equity consideration for vested "in the money" stock options and unvested restricted stock units 2,143 Fair value of the replacement equity awards attributable to pre-acquisition service 9,307 Total consideration paid, excluding cash acquired $ 752,142
Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed	June 29, 2018. The final purchase price allocation is as follows (in thousands): Preliminary Allocation as of Allocation Adjustments Adjusted Allocation September 29, 2017 June 29, 2018 Current assets $ 7,375 $ (1,088 ) $ 6,287 Intangible assets 19,000 — 19,000 Other assets 3,301 (81 ) 3,220 Total assets acquired 29,676 (1,169 ) 28,507 Current liabilities 2,169 142 2,311 Other liabilities 190 275 465 Total liabilities assumed 2,359 417 2,776 Net assets acquired 27,317 (1,586 ) 25,731 Consideration: Cash paid upon closing, net of cash acquired 33,500 — 33,500 Goodwill $ 6,183 $ 1,586 $ 7,769 The final purchase price allocation is as follows (in thousands): Preliminary Allocation as of Allocation Adjustments Adjusted Allocation September 29, 2017 December 29, 2017 Current assets $ 70,434 $ (553 ) $ 69,881 Intangible assets 412,848 — 412,848 Assets held for sale 40,944 — 40,944 Other assets 9,800 — 9,800 Total assets acquired 534,026 (553 ) 533,473 Liabilities assumed: Liabilities held for sale 4,444 — 4,444 Other liabilities 17,627 651 18,278 Total liabilities assumed 22,071 651 22,722 Net assets acquired 511,955 (1,204 ) 510,751 Consideration: Cash paid upon closing 230,298 — 230,298 Common stock issued 455,775 — 455,775 Equity instruments issued 9,307 — 9,307 Total consideration $ 695,380 $ — $ 695,380 Goodwill $ 183,425 $ 1,204 $ 184,629
Components of Acquired Intangible Assets on a Preliminary Basis	The components of the acquired intangible assets were as follows (in thousands): Included In Assets Held For Sale Included in Retained Business Useful Lives (Years) Developed technology $ 9,600 $ 78,448 7 years Customer relationships — 334,400 14 years Total acquired intangible assets $ 9,600 $ 412,848
Summary of Unaudited Supplemental Pro Forma Data	The following is a summary of AppliedMicro revenue and earnings included in our accompanying condensed consolidated statements of operations for the three and nine months ended June 30, 2017 (in thousands): Three Months Ended Nine Months Ended June 30, 2017 June 30, 2017 Revenue $ 42,019 $ 78,464 Loss from continuing operations (3,744 ) (34,049 ) Loss from discontinued operations (15,574 ) (32,004 ) This pro forma data is presented for informational purposes only and does not purport to be indicative of our future results of operations. Nine Months Ended June 30, 2017 Revenue $ 589,347 Income from continuing operations (90,809 ) Loss from discontinued operations (33,015 )

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Jun. 29, 2018
Discontinued Operations and Disposal Groups [Abstract]
Summary of Operating Results through Dates of Divestiture Related to Divested Businesses	The accompanying consolidated statements of operations include the following operating results related to these discontinued operations (in thousands): Three Months Ended Nine Months Ended June 29, 2018 June 30, 2017 June 29, 2018 June 30, 2017 Revenue (1) $ — $ 35 $ — $ 294 Cost of revenue (1) — (278 ) (596 ) 1,342 Gross profit — 313 596 (1,048 ) Operating expenses: Research and development (1) 175 10,611 4,873 18,936 Selling, general and administrative (1) 45 5,277 1,560 12,021 Total operating expenses 220 15,888 6,433 30,957 Loss from operations (220 ) (15,575 ) (5,837 ) (32,005 ) Other income (2) — 1,875 — 5,625 Gain on sale (2) — — — 18,022 Loss before income taxes (220 ) (13,700 ) (5,837 ) (8,358 ) Income tax provision — — — — Loss from discontinued operations $ (220 ) $ (13,700 ) $ (5,837 ) $ (8,358 ) Cash flow from operating activities (29 ) (12,312 ) (10,356 ) (41,384 ) Cash flow from investing activities — 1,875 — 23,645

Short Term Investments (Tables)

Short Term Investments (Tables)	9 Months Ended
	Jun. 29, 2018
Investments, Debt and Equity Securities [Abstract]
Summary of Available for Sale Investments	The amortized cost, gross unrealized holding gains or losses, and fair value of our investments by major investment type as of June 29, 2018 and September 29, 2017 are summarized in the tables below (in thousands): June 29, 2018 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 28,726 $ — $ (602 ) $ 28,124 Commercial paper 69,641 — (42 ) 69,599 Total short-term investments $ 98,367 $ — $ (644 ) $ 97,723 September 29, 2017 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 26,366 $ 10 $ (166 ) $ 26,210 Commercial paper 57,943 4 (36 ) 57,911 Total short-term investments $ 84,309 $ 14 $ (202 ) $ 84,121 September 29, 2017 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 26,366 $ 10 $ (166 ) $ 26,210 Commercial paper 57,943 4 (36 ) 57,911 Total short-term investments $ 84,309 $ 14 $ (202 ) $ 84,121
Summary of Contractual Maturities of Investments	The contractual maturities of investments were as follows (in thousands): June 29, 2018 September 29, 2017 Less than 1 year $ 70,848 $ 60,433 Over 1 year 26,875 23,688 Total short-term investments $ 97,723 $ 84,121

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Jun. 29, 2018
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): June 29, 2018 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 97 $ 97 $ — $ — Commercial paper 69,599 — 69,599 — Corporate bonds 28,124 — 28,124 — Total assets measured at fair value $ 97,820 $ 97 $ 97,723 $ — Liabilities Contingent consideration $ 510 $ — $ — $ 510 Common stock warrant liability 15,880 — — 15,880 Total liabilities measured at fair value $ 16,390 $ — $ — $ 16,390 September 29, 2017 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 36 $ 36 $ — $ — Commercial paper 57,911 — 57,911 — Corporate bonds 26,210 — 26,210 — Total assets measured at fair value $ 84,157 $ 36 $ 84,121 $ — Liabilities Contingent consideration $ 1,679 $ — $ — $ 1,679 Common stock warrant liability 40,775 — — 40,775 Total liabilities measured at fair value $ 42,454 $ — $ — $ 42,454
Quantitative information Used in Fair Value Calculation of Level 3 Liabilities	The quantitative information utilized in the fair value calculation of our Level 3 liabilities is as follows: Inputs Liabilities Valuation Technique Unobservable Input June 29, 2018 September 29, 2017 Contingent consideration Discounted cash flow Discount rate 9.2% 9.2% Probability of achievement 80% 70% - 100% Timing of cash flows 2 months 2 - 8 months Warrant liability Black-Scholes model Volatility 58.6% 44.9% Discount rate 2.52% 1.62% Expected life 2.5 years 3.2 years Exercise price $14.05 $14.05 Stock price $23.04 $44.61 Dividend rate —% —%
Changes in Liabilities with Inputs Classified within Level 3 of Fair Value	The changes in liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): September 29, Net Realized/Unrealized Gains Included in Earnings Purchases and Issuances Sales and Settlements June 29, Contingent consideration $ 1,679 $ (469 ) $ — $ (700 ) $ 510 Common stock warrant liability $ 40,775 $ (24,895 ) $ — $ — $ 15,880 September 30, Net Realized/Unrealized Losses Included in Earnings Purchases and Issuances Sales and Settlements June 30, Contingent consideration $ 848 $ 46 $ 1,701 $ (400 ) $ 2,195 Common stock warrant liability $ 38,253 $ 16,481 $ — $ — $ 54,734
Changes in Assets with Inputs Classified within Level 3 of Fair Value	The changes in liabilities with inputs classified within Level 3 of the fair value hierarchy consist of the following (in thousands): September 29, Net Realized/Unrealized Gains Included in Earnings Purchases and Issuances Sales and Settlements June 29, Contingent consideration $ 1,679 $ (469 ) $ — $ (700 ) $ 510 Common stock warrant liability $ 40,775 $ (24,895 ) $ — $ — $ 15,880 September 30, Net Realized/Unrealized Losses Included in Earnings Purchases and Issuances Sales and Settlements June 30, Contingent consideration $ 848 $ 46 $ 1,701 $ (400 ) $ 2,195 Common stock warrant liability $ 38,253 $ 16,481 $ — $ — $ 54,734

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Jun. 29, 2018
Inventory Disclosure [Abstract]
Components of Inventories	Inventories, net of reserves, consist of the following (in thousands): June 29, September 29, Raw materials $ 69,803 $ 78,999 Work-in-process 13,976 13,962 Finished goods 39,087 43,113 Total inventory, net $ 122,866 $ 136,074

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Jun. 29, 2018
Property, Plant and Equipment [Abstract]
Components of Property, Plant and Equipment	Property, plant and equipment consists of the following (in thousands): June 29, September 29, Construction in process $ 35,645 $ 22,195 Machinery and equipment 173,433 160,955 Leasehold improvements 13,358 13,809 Furniture and fixtures 2,513 2,078 Computer equipment and software 17,086 16,539 Capital lease assets 19,983 20,410 Total property and equipment $ 262,018 $ 235,986 Less accumulated depreciation and amortization (122,603 ) (104,967 ) Property and equipment, net $ 139,415 $ 131,019

Debt (Tables)

Debt (Tables)	9 Months Ended
	Jun. 29, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	All principal amounts outstanding and interest rate information as of June 29, 2018 , for the Credit Agreement were as follows (in millions, except rate data): Principal Outstanding LIBOR Rate Margin Effective Interest Rate Term loans $681.6 2.09% 2.25% 4.34%
Schedule of Remained Outstanding on Term Loans	As of June 29, 2018 , the following remained outstanding on the Term Loans (in thousands): Principal balance $ 681,577 Unamortized discount (4,927 ) Unamortized deferred financing costs (10,619 ) Total term loans $ 666,031 Current portion 6,885 Long-term, less current portion $ 659,146
Schedule of Minimum Principal Payments under Term Loans	As of June 29, 2018 , the minimum principal payments under the Term Loans in future fiscal years were as follows (in thousands): 2018 (rest of fiscal year) $ 1,721 2019 6,885 2020 6,885 2021 6,885 2022 6,885 Thereafter 652,316 Total $ 681,577

Capital Lease and Financing O36

Capital Lease and Financing Obligations (Tables)	9 Months Ended
	Jun. 29, 2018
Leases [Abstract]
Schedule of Future Minimum Lease Payments for Capital Leases	As of June 29, 2018 , future minimum payments under capital lease obligations and financing obligations related to the Leases were as follows (in thousands): Fiscal year ending: Amount 2018 (rest of fiscal year) $ 399 2019 1,529 2020 1,471 2021 1,374 2022 1,211 Thereafter 20,457 Total minimum capital lease payments 26,441 Less amount representing interest (14,970 ) Present value of net minimum capital lease payments (1) $ 11,471 (1) Excludes $13.9 million associated with the 144 Chelmsford Lease that has not yet been placed in service.

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Jun. 29, 2018
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 Nine Months Ended June 29, June 30, June 29, June 30, Cost of revenue $ 8,594 $ 8,416 $ 24,913 $ 21,694 Selling, general and administrative 13,081 10,833 35,827 24,463 Total $ 21,675 $ 19,249 $ 60,740 $ 46,157
Summary of Intangible Assets	Intangible assets consist of the following (in thousands): June 29, September 29, Acquired technology $ 251,811 $ 251,655 Customer relationships 518,233 556,648 Trade name 3,400 3,400 Total $ 773,444 $ 811,703 Less accumulated amortization (239,568 ) (190,611 ) Intangible assets — net $ 533,876 $ 621,092
Summary of Activity in Intangible Assets and Goodwill	A summary of the activity in intangible assets and goodwill follows (in thousands): Intangible Assets Total Intangible Assets Acquired Technology Customer Trade Name Goodwill Balance at September 29, 2017 $ 811,703 $ 251,655 $ 556,648 $ 3,400 $ 313,765 Allocation to divested business (39,285 ) — (39,285 ) — (2,560 ) Fair value adjustment — — — — 2,790 Currency translation adjustment 1,026 156 870 — 406 Balance at June 29, 2018 $ 773,444 $ 251,811 $ 518,233 $ 3,400 $ 314,401
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years	As of June 29, 2018 , our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands): 2018 Remaining 2019 2020 2021 2022 Thereafter Total Amortization expense $ 20,953 83,796 81,706 74,089 61,851 208,081 $ 530,476

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	9 Months Ended
	Jun. 29, 2018
Earnings Per Share [Abstract]
Computation for Basic and Diluted Net 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 Nine Months Ended June 29, 2018 June 30, 2017 June 29, 2018 June 30, 2017 Numerator: Loss from continuing operations $ (85,210 ) $ (13,977 ) $ (117,647 ) $ (150,414 ) Loss from discontinued operations (220 ) (13,700 ) (5,837 ) (8,358 ) Net loss $ (85,430 ) $ (27,677 ) $ (123,484 ) $ (158,772 ) Warrant liability gain — — (24,895 ) — Net loss attributable to common stockholders $ (85,430 ) $ (27,677 ) $ (148,379 ) $ (158,772 ) Denominator: Weighted average common shares outstanding-basic 64,920 64,019 64,598 59,524 Dilutive effect of warrants — — 600 — Weighted average common shares outstanding-diluted 64,920 $ 64,019 $ 65,198 $ 59,524 Loss per share-basic: Continuing operations $ (1.31 ) $ (0.22 ) $ (1.82 ) $ (2.53 ) Discontinued operations 0.00 (0.21 ) (0.09 ) (0.14 ) Net loss to common stock holders per share-basic $ (1.32 ) $ (0.43 ) $ (1.91 ) $ (2.67 ) Loss per share-diluted: Continuing operations $ (1.31 ) $ (0.22 ) $ (2.19 ) $ (2.53 ) Discontinued operations 0.00 (0.21 ) (0.09 ) (0.14 ) Net loss to common stock holders per share-diluted $ (1.32 ) $ (0.43 ) $ (2.28 ) $ (2.67 )

Restructurings (Tables)

Restructurings (Tables)	9 Months Ended
	Jun. 29, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure [Text Block]	RESTRUCTURINGS We have periodically implemented restructuring actions in connection with broader plans to reduce staffing, reduce our internal manufacturing footprint and generally reduce operating costs. The restructuring expenses are primarily comprised of direct and incremental costs related to headcount reductions including severance and outplacement fees for the terminated employees, as well as facility closure costs. During the fiscal quarter ended December 29, 2017, we initiated plans to restructure our facility in Long Beach, California and to close our facilities in Belfast, the United Kingdom and Sydney, Australia. As of June 29, 2018, the operations from the Long Beach facility have been consolidated into our other California locations in order to achieve operational synergies. The Belfast and Sydney facilities have been closed as we have discontinued certain product development activities that were performed in those locations. We do not expect to incur any additional restructuring costs associated with these facilities. The following is a summary of the restructuring charges incurred for the three and nine months ended June 29, 2018 under these restructuring plans (in thousands): Three Months Ended Nine Months Ended June 29, June 30, June 29, June 30, Employee related expenses $ 4 $ 586 $ 2,796 $ 2,342 Facility related expenses 98 — 3,506 — Total restructuring charges $ 102 $ 586 $ 6,302 $ 2,342 The following is a summary of the costs incurred for the nine months ended June 29, 2018 and the remaining balances included in accrued expenses at June 29, 2018 (in thousands): Balance as of September 29, 2017 $ 627 Current period expense 6,302 Charges paid/settled (6,131 ) Balance as of June 29, 2018 $ 798 As described in Note 20 - Subsequent Events , we have committed to a plan to exit certain production and product lines including certain production facilities located in Ithaca, New York. There were no restructuring charges incurred as of June 29, 2018 for these facilities, and we expect to incur restructuring costs of approximately $4.9 million to $6.2 million during the remainder of calendar year 2018 as we complete these restructuring actions.
Restructuring and Related Costs [Table Text Block]	The following is a summary of the restructuring charges incurred for the three and nine months ended June 29, 2018 under these restructuring plans (in thousands): Three Months Ended Nine Months Ended June 29, June 30, June 29, June 30, Employee related expenses $ 4 $ 586 $ 2,796 $ 2,342 Facility related expenses 98 — 3,506 — Total restructuring charges $ 102 $ 586 $ 6,302 $ 2,342
Summary of Costs Incurred and Remaining Balances Included in Accrued Expenses	The following is a summary of the costs incurred for the nine months ended June 29, 2018 and the remaining balances included in accrued expenses at June 29, 2018 (in thousands): Balance as of September 29, 2017 $ 627 Current period expense 6,302 Charges paid/settled (6,131 ) Balance as of June 29, 2018 $ 798

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Jun. 29, 2018
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 shows a summary of share-based compensation expense included in the Condensed Consolidated Statements of Operations for the three and nine months ended June 29, 2018 and June 30, 2017 (in thousands): Three Months Ended Nine Months Ended June 29, June 30, June 29, June 30, Cost of revenue $ 1,019 $ 846 $ 2,881 $ 2,245 Research and development 3,785 3,006 10,422 7,677 Selling, general and administrative 3,950 6,083 10,792 17,744 Total share-based compensation expense $ 8,754 $ 9,935 $ 24,095 $ 27,666
Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity	A summary of restricted stock, restricted stock unit and performance-based restricted stock unit activity for the nine months ended June 29, 2018 , is as follows (in thousands, except per share data): Number of RSAs, RSUs and PRSUs Weighted- Average Grate Date Fair Value Aggregate Intrinsic Value (in thousands) Balance at September 29, 2017 1,907 $ 39.20 $ 72,165 Granted 1,067 26.91 Vested and released (883 ) 35.29 Forfeited, canceled or expired (217 ) 34.54 Balance at June 29, 2018 1,874 $ 34.59 $ 43,029

Supplemental Cash Flow Inform41

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Jun. 29, 2018
Supplemental Cash Flow Elements [Abstract]
Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities	The following is supplemental cash flow information regarding non-cash investing and financing activities (in thousands): Nine Months Ended June 29, June 30, Cash paid for interest $ 21,804 $ 23,260 Cash paid (refunded) for income taxes $ 3,435 $ (548 )

Geographic and Significant Cu42

Geographic and Significant Customer Information (Tables)	9 Months Ended
	Jun. 29, 2018
Segment Reporting [Abstract]
Summary of Different Geographic Regions	Information about our operations in different geographic regions, based upon customer locations, is presented below (in thousands): Three Months Ended Nine Months Ended Revenue by Geographic Region June 29, June 30, June 29, June 30, United States $ 67,861 $ 82,637 $ 197,540 $ 192,821 China 39,016 51,191 115,068 168,026 Asia Pacific, excluding China (1) 17,795 43,756 64,028 129,298 Other Countries (2) 13,200 16,971 42,574 42,246 Total $ 137,872 $ 194,555 $ 419,210 $ 532,391 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Australia, Malaysia, New Zealand, the Philippines and Vietnam. (2) No international country or region represented greater than 10% of the total revenue as of the dates presented, other than China and the Asia Pacific region as presented above. As of Long-Lived Assets by Geographic Region June 29, September 29, United States $ 111,199 $ 101,044 Asia Pacific (1) 25,754 24,945 Other Countries (2) 2,462 5,030 Total $ 139,415 $ 131,019 (1) Asia Pacific represents Taiwan, India, Japan, Thailand, South Korea, Australia, Malaysia, New Zealand, the Philippines, Vietnam and China. (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 as presented above.
Summary of Customer Concentrations as Percentage of Revenue 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 Nine Months Ended Revenue June 29, June 30, June 29, June 30, Customer A 14 % 10 % 12% 10% Customer B 8 % 10 % 8% 8% Customer C 5 % 5 % 6% 12% Accounts Receivable June 29, September 29, Customer A 18 % 13 % Customer D 19 % 14 %

Summary of Significant Accoun43

Summary of Significant Accounting Policies (Details) $ in Millions	9 Months Ended
	Jun. 29, 2018USD ($)segment
Accounting Policies [Abstract]
Number of reportable operating segment | segment	1
Accounting Standards Update 2016-09 [Member] | Accumulated Deficit [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | $	$ 1

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) - USD ($) $ in Thousands	Aug. 09, 2017	Jan. 26, 2017	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Equity instruments issued					$ 0	$ 465,082
Applied Micro Circuits Corporation
Business Acquisition [Line Items]
Total consideration paid		$ 695,400			695,380
Cash consideration paid, excluding consideration paid for vested equity awards		287,100
Cash acquired from acquisition		56,800
Fair value of equity issued		465,100
Equity instruments issued		453,632
Transaction costs			$ 0	$ 100	$ 0	$ 11,900
Weighted-average life of identified intangible assets acquired					12 years 8 months 12 days
Cash consideration paid		287,060
Applied Micro Circuits Corporation | Stock Options And Restricted Stock [Member]
Business Acquisition [Line Items]
Fair value of equity instruments transferred		14,500
Equity instruments issued		$ 9,300			$ 9,307
Picometrix
Business Acquisition [Line Items]
Total consideration paid	$ 29,500
Transaction costs					0
Cash consideration paid	33,500				$ 33,500
Indemnification assets	$ 4,000

Acquisitions Acquisitions - Acq

Acquisitions Acquisitions - Acquisition Consideration Transferred (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 26, 2017	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Common stock issued (9,544,125 shares of our common stock at $47.53 per share)				$ 0	$ 465,082
Applied Micro Circuits Corporation
Business Acquisition [Line Items]
Cash consideration paid to AppliedMicro common stockholders	$ 287,060
Common stock issued (9,544,125 shares of our common stock at $47.53 per share)	453,632
Equity consideration for vested in the money stock options and unvested restricted stock units	2,143
Fair value of the replacement equity awards attributable to pre-acquisition service	9,307
Total consideration paid, excluding cash acquired	$ 752,142
Number of shares issued for acquisition (in shares)	9,544,125
Price per share issued for acquisition (in dollars per share)	$ 47.53
Transaction costs		$ 0	$ 100	$ 0	$ 11,900

Acquisitions - Schedule of Aggr

Acquisitions - Schedule of Aggregate Purchase Price Allocated to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Aug. 09, 2017	Jan. 26, 2017	Jun. 29, 2018	Jun. 30, 2017	Sep. 29, 2017
Consideration:
Cash paid upon closing, net of cash acquired			$ 0	$ 231,712
Equity instruments issued			0	$ 465,082
Goodwill			314,401		$ 313,765
Applied Micro Circuits Corporation
Business Acquisition [Line Items]
Current assets			69,881
Intangible assets			412,848
Assets held for sale			40,944
Other assets			9,800
Total assets acquired			533,473
Liabilities assumed:
Liabilities held for sale			4,444
Other liabilities			18,278
Total liabilities assumed			22,722
Net assets acquired			510,751
Consideration:
Cash paid upon closing, net of cash acquired			230,298
Equity instruments issued		$ 453,632
Total consideration		695,400	695,380
Cash paid upon closing, net of cash acquired		287,060
Goodwill			184,629
Applied Micro Circuits Corporation | Stock Options And Restricted Stock [Member]
Consideration:
Equity instruments issued		$ 9,300	9,307
Applied Micro Circuits Corporation | Common Stock
Consideration:
Equity instruments issued			455,775
Applied Micro Circuits Corporation | Preliminary Allocation [Member]
Business Acquisition [Line Items]
Current assets					70,434
Intangible assets					412,848
Assets held for sale					40,944
Other assets					9,800
Total assets acquired					534,026
Liabilities assumed:
Liabilities held for sale					4,444
Other liabilities					17,627
Total liabilities assumed					22,071
Net assets acquired					511,955
Consideration:
Cash paid upon closing, net of cash acquired					230,298
Total consideration					695,380
Goodwill					183,425
Applied Micro Circuits Corporation | Preliminary Allocation [Member] | Stock Options And Restricted Stock [Member]
Consideration:
Equity instruments issued					9,307
Applied Micro Circuits Corporation | Preliminary Allocation [Member] | Common Stock
Consideration:
Equity instruments issued					455,775
Applied Micro Circuits Corporation | Allocation Adjustments [Member]
Business Acquisition [Line Items]
Current assets			(553)
Intangible assets			0
Assets held for sale			0
Other assets			0
Total assets acquired			(553)
Liabilities assumed:
Liabilities held for sale			0
Other liabilities			651
Total liabilities assumed			651
Net assets acquired			(1,204)
Consideration:
Cash paid upon closing, net of cash acquired			0
Total consideration			0
Goodwill			1,204
Applied Micro Circuits Corporation | Allocation Adjustments [Member] | Stock Options And Restricted Stock [Member]
Consideration:
Equity instruments issued			0
Applied Micro Circuits Corporation | Allocation Adjustments [Member] | Common Stock
Consideration:
Equity instruments issued			0
Picometrix
Business Acquisition [Line Items]
Current assets			6,287
Intangible assets			19,000
Other assets			3,220
Total assets acquired			28,507
Liabilities assumed:
Current liabilities			2,311
Other liabilities			465
Total liabilities assumed			2,776
Net assets acquired			25,731
Consideration:
Total consideration	$ 29,500
Cash paid upon closing, net of cash acquired	$ 33,500		33,500
Goodwill			7,769
Picometrix | Preliminary Allocation [Member]
Business Acquisition [Line Items]
Current assets					7,375
Intangible assets					19,000
Other assets					3,301
Total assets acquired					29,676
Liabilities assumed:
Current liabilities					2,169
Other liabilities					190
Total liabilities assumed					2,359
Net assets acquired					27,317
Consideration:
Cash paid upon closing, net of cash acquired					33,500
Goodwill					$ 6,183
Picometrix | Allocation Adjustments [Member]
Business Acquisition [Line Items]
Current assets			(1,088)
Intangible assets			0
Other assets			(81)
Total assets acquired			(1,169)
Liabilities assumed:
Current liabilities			142
Other liabilities			275
Total liabilities assumed			417
Net assets acquired			(1,586)
Consideration:
Cash paid upon closing, net of cash acquired			0
Goodwill			$ 1,586

Acquisitions - Components of Ac

Acquisitions - Components of Acquired Intangible Assets on a Preliminary Basis (Details) - Applied Micro Circuits Corporation $ in Thousands	9 Months Ended
	Jun. 29, 2018USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 412,848
Included In Assets Held For Sale
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	9,600
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 78,448
Useful Lives (Years)	7 years
Developed technology | Included In Assets Held For Sale
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 9,600
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 334,400
Useful Lives (Years)	14 years
Customer relationships | Included In Assets Held For Sale
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 0

Acquisitions - Summary of Reven

Acquisitions - Summary of Revenue and Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Loss from discontinued operations	$ (220)	$ (13,700)	$ (5,837)	$ (8,358)
Applied Micro Circuits Corporation
Business Acquisition [Line Items]
Revenue		42,019		78,464
Loss from continuing operations		(3,744)		(34,049)
Loss from discontinued operations		$ (15,574)		$ (32,004)

Acquisitions - Summary of Unaud

Acquisitions - Summary of Unaudited Supplemental Pro Forma Data (Details) - Applied Micro Circuits Corporation $ in Thousands	9 Months Ended
	Jun. 30, 2017USD ($)
Business Acquisition [Line Items]
Revenue	$ 589,347
Income from continuing operations	(90,809)
Loss from discontinued operations	$ (33,015)

Discontinued Operations - Addit

Discontinued Operations - Additional information (Details) - USD ($)	May 10, 2018	Aug. 17, 2015	Aug. 01, 2018	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payment received for sale of divested business						$ 5,000,000	$ 215,000
Other income				$ 0		0
Service Agreements [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred Revenue				7,000,000		$ 7,000,000
Consulting Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consulting service contract period		2 years
Other income				$ 0	$ 1,875,000		$ 5,625,000
Consulting Agreement | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration on sale of business		$ 15,000,000
Automotive Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnification escrow		$ 18,000,000
Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling interest ownership percentage				20.00%		20.00%
Compute | Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment cost basis				$ 36,500,000		$ 36,500,000
Noncontrolling interest ownership percentage				20.00%		20.00%
Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payment received for sale of divested business	$ 5,000,000			$ 5,000,000
Loss on disposal				34,000,000
Inventory				13,100,000		$ 13,100,000
Fixed assets				7,600,000		7,600,000
Goodwill				2,600,000		2,600,000
Transition services expense				400,000		400,000
Disposal Group, Not Discontinued Operations | LR4 | Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Service agreement liability				2,000,000		2,000,000
Disposal Group, Not Discontinued Operations | Customer relationships | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intangible assets				27,700,000		27,700,000
Selling, General and Administrative | Disposal Group, Not Discontinued Operations | Compute
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transition services agreement reimbursements				$ 1,000,000		3,500,000
Other Current Assets [Member] | Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional consideration expected to be received						7,300,000
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] | Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional consideration expected to be received						$ 5,000,000
Scenario, Forecast | Disposal Group, Not Discontinued Operations | LR4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional consideration expected to be received			$ 12,300,000
Cash consideration on sale of business			$ 17,300,000

Discontinued Operations - Summa

Discontinued Operations - Summary of Operating Results through Dates of Divestiture Related to Divested Businesses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue (1)	$ 0	$ 35	$ 0	$ 294
Cost of revenue (1)	0	(278)	(596)	1,342
Gross profit	0	313	596	(1,048)
Operating expenses:
Research and development (1)	175	10,611	4,873	18,936
Selling, general and administrative (1)	45	5,277	1,560	12,021
Total operating expenses	220	15,888	6,433	30,957
Loss from operations	(220)	(15,575)	(5,837)	(32,005)
Other income (2)	0		0
Gain on sale (2)	0	0	0	18,022
Loss before income taxes	(220)	(13,700)	(5,837)	(8,358)
Income tax provision	0	0	0	0
Loss from discontinued operations	(220)	(13,700)	(5,837)	(8,358)
Cash flow from operating activities	(29)	(12,312)	(10,356)	(41,384)
Cash flow from investing activities	0	1,875	$ 0	23,645
Consulting Agreement
Operating expenses:
Other income (2)	$ 0	$ 1,875		$ 5,625

Investments - Summary of Availa

Investments - Summary of Available for Sale Investments (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 98,367	$ 84,309
Gross Unrealized Holding Gains	0	14
Gross Unrealized Holding Losses	(644)	(202)
Aggregate Fair Value	97,723	84,121
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	28,726	26,366
Gross Unrealized Holding Gains	0	10
Gross Unrealized Holding Losses	(602)	(166)
Aggregate Fair Value	28,124	26,210
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	69,641	57,943
Gross Unrealized Holding Gains	0	4
Gross Unrealized Holding Losses	(42)	(36)
Aggregate Fair Value	$ 69,599	$ 57,911

Investments - Change in Availab

Investments - Change in Available for Sale Investments (Details) $ in Thousands	Jun. 29, 2018USD ($)
Movement in Available-for-sale Securities [Roll Forward]
Balance at beginning of period	$ 84,121
Balance at end of period	97,723
Corporate Debt Securities [Member]
Movement in Available-for-sale Securities [Roll Forward]
Balance at beginning of period	26,210
Balance at end of period	$ 28,124

Investments - Summary of Contra

Investments - Summary of Contractual Maturities of Investments (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Investments, Debt and Equity Securities [Abstract]
Less than 1 year	$ 70,848	$ 60,433
Over 1 year	26,875	23,688
Total short-term investments	$ 97,723	$ 84,121

Investments - Other Investments

Investments - Other Investments (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 29, 2018USD ($)investment	Jun. 29, 2018USD ($)investment	Jun. 30, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
Number of equity investments | investment	2	2
Income (Loss) from Equity Method Investments		$ (7,241)	$ 0
Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Noncontrolling interest ownership percentage	20.00%	20.00%
Equity Securities | Compute
Schedule of Available-for-sale Securities [Line Items]
Investment cost basis	$ 36,500	$ 36,500
Noncontrolling interest ownership percentage	20.00%	20.00%
Equity Method Investment, Aggregate Cost	$ 36,500	$ 36,500
Income (Loss) from Equity Method Investments	3,100	7,200
Equity Method Investments	29,300	29,300
Preferred Stock | Privately Held Manufacturing Company
Schedule of Available-for-sale Securities [Line Items]
Investment cost basis	$ 5,000	$ 5,000

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 97,820	$ 84,157
Total liabilities measured at fair value	16,390	42,454
Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	510	1,679
Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	15,880	40,775
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	28,124	26,210
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	97	36
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	69,599	57,911
Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	97	36
Total liabilities measured at fair value	0	0
Active Markets for Identical Assets (Level 1) [Member] | Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	0	0
Active Markets for Identical Assets (Level 1) [Member] | Common Stock Warrant Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	0	0
Active Markets for Identical Assets (Level 1) [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Active Markets for Identical Assets (Level 1) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	97	36
Active Markets for Identical Assets (Level 1) [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	97,723	84,121
Total liabilities measured at fair value	0	0
Observable Inputs (Level 2) [Member] | Contingent Consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	0	0
Observable Inputs (Level 2) [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	0	0
Observable Inputs (Level 2) [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	28,124	26,210
Observable Inputs (Level 2) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Observable Inputs (Level 2) [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	69,599	57,911
Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Total liabilities measured at fair value	16,390	42,454
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	510	1,679
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	15,880	40,775
Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 0	$ 0

Fair Value Fair Value - Quantit

Fair Value Fair Value - Quantitative Information Used in Fair Value Calculation of Level 3 Liabilities (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 28, 2016	Jun. 29, 2018	Sep. 29, 2017
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Quantitative information Used in Fair Value Calculation of Level 3 Liabilities		The quantitative information utilized in the fair value calculation of our Level 3 liabilities is as follows: Inputs Liabilities Valuation Technique Unobservable Input June 29, 2018 September 29, 2017 Contingent consideration Discounted cash flow Discount rate 9.2% 9.2% Probability of achievement 80% 70% - 100% Timing of cash flows 2 months 2 - 8 months Warrant liability Black-Scholes model Volatility 58.6% 44.9% Discount rate 2.52% 1.62% Expected life 2.5 years 3.2 years Exercise price $14.05 $14.05 Stock price $23.04 $44.61 Dividend rate —% —%
Discount rate	8.60%
Fair Value, Measurements, Recurring [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities measured at fair value		$ 16,390	$ 42,454
Fair Value, Measurements, Recurring [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities measured at fair value		16,390	42,454
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities measured at fair value		510	1,679
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities measured at fair value		$ 510	$ 1,679
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Income Approach Valuation Technique [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Probability of Occurrence		80.00%
Discount rate		9.20%	9.20%
Expected life		2 months
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Minimum | Income Approach Valuation Technique [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Probability of Occurrence			70.00%
Expected life			2 months
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Maximum | Income Approach Valuation Technique [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Probability of Occurrence			100.00%
Expected life			8 months
Fair Value, Measurements, Recurring [Member] | Common Stock Warrant Liability [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities measured at fair value		$ 15,880	$ 40,775
Fair Value, Measurements, Recurring [Member] | Common Stock Warrant Liability [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities measured at fair value		$ 15,880	$ 40,775
Fair Value, Measurements, Recurring [Member] | Common Stock Warrant Liability [Member] | Market Approach Valuation Technique [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate		2.52%	1.62%
Expected life		2 years 5 months 23 days	3 years 2 months 12 days
Expected volatility rate		58.60%	44.90%
Exercise price (in usd per share)		$ 14.05	$ 14.05
Share Price		$ 23.04	$ 44.61
Fair Value Assumptions, Expected Dividend Rate		0.00%	0.00%

Fair Value - Changes in Assets

Fair Value - Changes in Assets and Liabilities with Inputs Classified within Level 3 of Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017
Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 1,679	$ 848
Net Realized/Unrealized Gains Included in Earnings	(469)	46
Purchases and Issuances	0	1,701
Sales and Settlements	700	(400)
Balance at end of period	510	2,195
Common Stock Warrant Liability [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	40,775	38,253
Net Realized/Unrealized Gains Included in Earnings	(24,895)	16,481
Purchases and Issuances	0	0
Sales and Settlements	0	0
Balance at end of period	$ 15,880	$ 54,734

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 69,803	$ 78,999
Work-in-process	13,976	13,962
Finished goods	39,087	43,113
Total inventory, net	$ 122,866	$ 136,074

Property Plant and Equipment -

Property Plant and Equipment - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 262,018	$ 235,986
Less accumulated depreciation and amortization	(122,603)	(104,967)
Property and equipment, net	139,415	131,019
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment	35,645	22,195
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	173,433	160,955
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	13,358	13,809
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	2,513	2,078
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	17,086	16,539
Capital lease assets
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 19,983	$ 20,410

Property Plant and Equipment 61

Property Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 7.7	$ 6.5	$ 23	$ 19.7

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)	9 Months Ended
	Jun. 29, 2018	May 09, 2018	May 02, 2018
Debt Instrument [Line Items]
Principle amount	$ 700,000,000
Unamortized deferred financing costs	11,600,000
Term Loans
Debt Instrument [Line Items]
Unamortized deferred financing costs	10,619,000
Amount drawn	$ 666,031,000
Effective interest rate	4.34%
Principal balance	$ 681,577,000
Estimated fair value of Term Loans	690,900,000
Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized deferred financing costs	1,000,000
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity	160,000,000
Credit facility, remaining borrowing capacity	160,000,000
May 2018 Amendments [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Gross	$ 500,000
Federal Funds Effective Swap Rate [Member] | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
One Month London Interbank Offered Rate (LIBOR) [Member] | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
LIBOR Rate | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Minimum | LIBOR Rate | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Extended Maturity | Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity		$ 30,000,000	$ 130,000,000
Line of credit facility maximum borrowing capacity maturity date not extended			$ 30,000,000

Debt Debt - Schedule of Long-te

Debt Debt - Schedule of Long-term Debt Instruments (Details) - Term Loans $ in Thousands	9 Months Ended
	Jun. 29, 2018USD ($)
Debt Instrument [Line Items]
Principal balance	$ 681,577
Effective interest rate	4.34%
LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Margin
Debt Instrument [Line Items]
Basis spread on variable rate	2.0935%

Debt - Schedule of Remained Out

Debt - Schedule of Remained Outstanding on Term Loans (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ (11,600)
Current portion	6,885	$ 6,885
Long-term, less current portion	659,146	$ 661,471
Term Loans
Debt Instrument [Line Items]
Principal balance	681,577
Unamortized discount	(4,927)
Unamortized deferred financing costs	(10,619)
Total term loans	666,031
Current portion	6,885
Long-term, less current portion	$ 659,146

Debt - Schedule of Minimum Prin

Debt - Schedule of Minimum Principal Payments under Term Loans (Details) - Term Loans $ in Thousands	Jun. 29, 2018USD ($)
Debt Instrument [Line Items]
2018 (rest of fiscal year)	$ 1,721
2,019	6,885
2,020	6,885
2,021	6,885
2,022	6,885
Thereafter	652,316
Total	$ 681,577

Capital Lease and Financing O66

Capital Lease and Financing Obligations Narrative (Details) - USD ($) $ in Thousands	Dec. 28, 2016	Jun. 29, 2018	Jun. 30, 2017
Capital Leased Assets [Line Items]
Proceeds from corporate facility financing obligation		$ 4,000	$ 4,250
Discount rate	8.60%
FiBest and Bin Optics
Capital Leased Assets [Line Items]
Financing obligations associated with leases		1,100
100 Chelmsford Street
Capital Leased Assets [Line Items]
Lease term	20 years
Proceeds from corporate facility financing obligation	$ 4,200
Amount of consideration received	4,000
Financing obligations associated with leases	$ 8,200
144 Chelmsford Street Lease
Capital Leased Assets [Line Items]
Lease term	20 years
Capital Lease Obligations Incurred		13,900
Corporate Facility Leases
Capital Leased Assets [Line Items]
Lease term	20 years
Financing obligations associated with leases		$ 26,000
121 Hale Street
Capital Leased Assets [Line Items]
Lease term	14 years
Financing obligations associated with leases	$ 4,000

Capital Lease and Financing O67

Capital Lease and Financing Obligations FutureMinimumLeasePayments (Details) $ in Thousands	Jun. 29, 2018USD ($)
Leases [Abstract]
2018 (rest of fiscal year)	$ 399
2,019	1,529
2,020	1,471
2,021	1,374
2,022	1,211
Thereafter	20,457
Total minimum capital lease payments	26,441
Less amount representing interest	(14,970)
Present value of net minimum capital lease payments	$ 11,471

Intangible Assets - Summary of

Intangible Assets - Summary of Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Total	$ 21,675	$ 19,249	$ 60,740	$ 46,157
Cost of Revenue
Finite-Lived Intangible Assets [Line Items]
Total	8,594	8,416	24,913	21,694
Selling, General and Administrative
Finite-Lived Intangible Assets [Line Items]
Total	$ 13,081	$ 10,833	$ 35,827	$ 24,463

Intangible Assets - Summary o69

Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Finite-Lived Intangible Assets [Line Items]
Trade name	$ 3,400	$ 3,400
Total	773,444	811,703
Less accumulated amortization	(239,568)	(190,611)
Intangible assets — net	533,876	621,092
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	251,811	251,655
Less accumulated amortization	(131,500)	(106,800)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	518,233	556,648
Less accumulated amortization	$ (108,100)	$ (83,900)

Intangible Assets - Summary o70

Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Details) $ in Thousands	9 Months Ended
	Jun. 29, 2018USD ($)
Goodwill and Intangible Assets [Roll Forward]
Beginning Balance	$ 811,703
Fair value adjustment	0
Currency translation adjustment	1,026
Ending Balance	773,444
Goodwill [Roll Forward]
Balance at beginning of period	313,765
Fair value adjustment	2,790
Currency translation adjustment	406
Balance at end of period	314,401
Trade Names
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Beginning Balance	3,400
Fair value adjustment	0
Currency translation adjustment	0
Ending Balance	3,400
Developed technology
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	251,655
Fair value adjustment	0
Currency translation adjustment	156
Ending Balance	251,811
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	556,648
Fair value adjustment	0
Currency translation adjustment	870
Ending Balance	518,233
LR4 | Disposal Group, Not Discontinued Operations
Goodwill and Intangible Assets [Roll Forward]
Allocation to divested business	(39,285)
Goodwill [Roll Forward]
Allocation to divestitures	(2,560)
LR4 | Disposal Group, Not Discontinued Operations | Trade Names
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Allocation to divestitures	0
LR4 | Disposal Group, Not Discontinued Operations | Developed technology
Finite-lived Intangible Assets [Roll Forward]
Allocation to divestitures	0
LR4 | Disposal Group, Not Discontinued Operations | Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Allocation to divestitures	$ (39,285)

Intangible Assets - Summary o71

Intangible Assets - Summary of Estimated Amortization of Intangible Assets (Details) $ in Thousands	Jun. 29, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2018 Remaining	$ 20,953
2,019	83,796
2,020	81,706
2,021	74,089
2,022	61,851
Thereafter	208,081
Total	$ 530,476

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	Jun. 29, 2018	Sep. 29, 2017
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 239,568	$ 190,611
Developed technology
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	131,500	106,800
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 108,100	$ 83,900

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - $ / shares	Jun. 29, 2018	Sep. 29, 2017	Mar. 31, 2012
Equity [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Class of Warrant or Right [Line Items]
Common stock warrants per share (in usd per share)			$ 14.05
Common Stock
Class of Warrant or Right [Line Items]
Common stock warrants (in shares)			1,281,358

Earnings (Loss) Per Share (Deta

Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Numerator:
Loss from continuing operations	$ (85,210)	$ (13,977)	$ (117,647)	$ (150,414)
Loss from discontinued operations	(220)	(13,700)	(5,837)	(8,358)
Net loss	(85,430)	(27,677)	(123,484)	(158,772)
Warrant liability gain	0	0	(24,895)	0
Net loss attributable to common stockholders	$ (85,430)	$ (27,677)	$ (148,379)	$ (158,772)
Denominator:
Weighted average common shares outstanding-basic	64,920,000	64,019,000	64,598,000	59,524,000
Dilutive effect of options and warrants (in shares)	0	0	600,192	0
Weighted average common shares outstanding-diluted	64,920,000	64,019,000	65,198,000	59,524,000
Loss per share-basic:
Continuing operations (in usd per share)	$ (1.313)	$ (0.22)	$ (1.82)	$ (2.53)
Discontinued operations (in usd per share)	(0.003)	(0.21)	(0.09)	(0.14)
Loss per share - basic	(1.32)	(0.43)	(1.91)	(2.67)
Loss per share-diluted:
Continuing operations (in usd per share)	(1.313)	(0.22)	(2.19)	(2.53)
Discontinued operations (in usd per share)	(0.003)	(0.21)	(0.09)	(0.14)
Loss per share - diluted	$ (1.32)	$ (0.43)	$ (2.28)	$ (2.67)
Number of antidilutive shares of common stock excluded from the calculation (in shares)	724,885	1,916,434	422,584	1,940,834

Restructurings Restructurings -

Restructurings Restructurings - Restructuring and Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 102	$ 586	$ 6,302	$ 2,342
Employee related costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	4	586	2,796	2,342
Facility related expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 98	$ 0	$ 3,506	$ 0

Restructurings - Summary of Cos

Restructurings - Summary of Costs Incurred and Remaining Balances Included in Accrued Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Restructuring Reserve [Roll Forward]
Balance as of beginning of period			$ 627
Current period expense	$ 102	$ 586	6,302	$ 2,342
Charges paid/settled			(6,131)
Balance as of end of period	$ 798		$ 798

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended	9 Months Ended
	Nov. 30, 2017	Nov. 24, 2017	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected to be recognized				$ 58.7
Compensation cost expected to be recognized, weighted-average period				2 years 6 months
Stock options outstanding (in shares)				1,400,000
Weighted-average exercise price per share (in usd per share)				$ 31.92
Weighted average remaining contractual term options outstanding				5 years 1 month 16 days
Aggregate intrinsic value stock options outstanding				$ 2.5
Options exercisable (in shares)				400,000
Weighted average exercise price of options exercisable (in dollars per share)				$ 19.12
Weighted-average remaining contractual term				3 years 10 months 21 days
Options exercisable intrinsic value				$ 2.5
Total intrinsic value of options exercised			$ 6.3	0.7	$ 8.2
Incentive Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	10,924
Non Qualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	69,076
Incentive And Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected to be recognized, weighted-average period	4 years 6 months
Aggregate grant date fair value	$ 1.4
Expected volatility rate	45.70%
Risk free interest rate	2.21%
Exercise price	$ 36.61
Expected term	6 years 6 months
Restricted Stock, Restricted Stock Units and Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock units vesting				$ 19.2	$ 46.8
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted				7 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted				10 years
Options Granted in November 2017 | Non Qualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected to be recognized, weighted-average period				3 years
Options granted (in shares)		325,000
Aggregate grant date fair value		$ 5
Term of vesting of options		7 years
Expected volatility rate				45.80%
Risk free interest rate				2.26%
Exercise price				$ 36.58
Expected term				7 years
Target price for common stock for recognition of unamortized compensation cost (in dollars per share)				$ 98.99
Measurement period for target price				30 days
2012 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants				14,100,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants				3,200,000
Unrecognized compensation cost				$ 1

Share-Based Compensation - Effe

Share-Based Compensation - Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Non-Employees (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 8,754	$ 9,935	$ 24,095	$ 27,666
Cost of Revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	1,019	846	2,881	2,245
Research and Development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	3,785	3,006	10,422	7,677
Selling, General and Administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 3,950	$ 6,083	$ 10,792	$ 17,744

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Jun. 29, 2018	Sep. 29, 2017
Number of RSAs, RSUs and PRSUs
Balance at beginning of period (in shares)	1,907
Granted (in shares)	1,067
Vested and released (in shares)	(883)
Forfeited, canceled or expired (in shares)	(217)
Balance at end of period (in shares)	1,874
Weighted- Average Grate Date Fair Value
Balance at beginning of period (in usd per share)	$ 39.20
Granted (in usd per share)	26.91
Vested and released (in usd per share)	35.29
Forfeited, canceled or expired (in usd per share)	34.54
Balance at end of period (in usd per share)	$ 34.59
Aggregate Intrinsic Value (in thousands)	$ 43,029	$ 72,165

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 29, 2018	Sep. 30, 2016	Jun. 29, 2018	Sep. 28, 2018	Sep. 29, 2017
Investments, Owned, Federal Income Tax Note [Line Items]
Unrecognized tax benefit	$ 300,000		$ 300,000		$ 1,700,000
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			1,400,000
Penalties and interest accrued	0		0		$ 0
Penalties and interest expense	$ 0	$ 0
Tax cuts and jobs act of 2017 re-measurement of U.S. deferred taxes			3,700,000
Tax Year 2018
Investments, Owned, Federal Income Tax Note [Line Items]
Tax effect of repatriation of foreign earnings			$ 1,000,000
Scenario, Forecast
Investments, Owned, Federal Income Tax Note [Line Items]
Effective tax rate				24.50%

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 29, 2018	Jun. 29, 2018	Jun. 30, 2017
Cadence | Public Company
Related Party Transaction [Line Items]
Other expense - related party	$ 4.1	$ 3.2	$ 4.7

Supplemental Cash Flow Inform82

Supplemental Cash Flow Information - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 29, 2018	Jun. 29, 2018	Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Equity Method Investments		$ (7,241)	$ 0
Unpaid amounts related to purchase of assets		2,800	900
Capitalized construction costs for capital leases		16,500	1,300
Common stock issued (9,544,125 shares of our common stock at $47.53 per share)		0	465,082
Compute Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration on sale of business	$ 36,500	36,500
Compute | Equity Securities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment cost basis	36,500	36,500
Income (Loss) from Equity Method Investments	$ 3,100	7,200
Developer Funded [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capitalized construction costs for capital leases		$ 10,800	$ 1,300

Supplemental Cash Flow Inform83

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017
Noncash or Part Noncash Acquisitions [Line Items]
Common stock issued (9,544,125 shares of our common stock at $47.53 per share)	$ 0	$ 465,082
Cash paid for interest	21,804	23,260
Cash paid (refunded) for income taxes	3,435	(548)
Capitalized construction costs for capital leases	16,500	1,300
Developer Funded [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Capitalized construction costs for capital leases	$ 10,800	$ 1,300

Geographic and Significant Cu84

Geographic and Significant Customer Information - Additional Information (Details)	3 Months Ended		9 Months Ended
	Jun. 29, 2018customer	Jun. 30, 2017customer	Jun. 29, 2018segmentcustomer	Jun. 30, 2017customer
Segment Reporting [Abstract]
Number of reportable operating segment | segment			1
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of major customers | customer	10	10	10	10
Revenue | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	59.00%	51.00%	55.00%	55.00%

Geographic and Significant Cu85

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017	Sep. 29, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	$ 137,872	$ 194,555	$ 419,210	$ 532,391
Long-Lived Assets by Geographic Region	139,415		139,415		$ 131,019
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	67,861	82,637	197,540	192,821
Long-Lived Assets by Geographic Region	111,199		111,199		101,044
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	39,016	51,191	115,068	168,026
Asia Pacific, excluding China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	17,795	43,756	64,028	129,298
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets by Geographic Region	25,754		25,754		24,945
Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue by Geographic Region	13,200	$ 16,971	42,574	$ 42,246
Long-Lived Assets by Geographic Region	$ 2,462		$ 2,462		$ 5,030

Geographic and Significant Cu86

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Revenue and Accounts Receivable (Details) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Revenue
Revenue from External Customer [Line Items]
Concentration risk, percentage	59.00%	51.00%	55.00%	55.00%
Revenue | Customer A
Revenue from External Customer [Line Items]
Concentration risk, percentage	14.00%	10.00%	12.00%	10.00%
Revenue | Customer B
Revenue from External Customer [Line Items]
Concentration risk, percentage	8.00%	10.00%	8.00%	8.00%
Revenue | Customer C
Revenue from External Customer [Line Items]
Concentration risk, percentage	5.00%	5.00%	6.00%	12.00%
Accounts Receivable [Member] | Customer A
Revenue from External Customer [Line Items]
Concentration risk, percentage			18.00%	13.00%
Accounts Receivable [Member] | Customer D
Revenue from External Customer [Line Items]
Concentration risk, percentage			19.00%	14.00%

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Thousands	6 Months Ended	9 Months Ended
	Dec. 28, 2018	Jun. 29, 2018	Jun. 30, 2017	Sep. 29, 2017
Subsequent Event [Line Items]
Payments for Restructuring		$ 6,131
Impairment related charges		9,143	$ 0
Inventory		122,866		$ 136,074
Property and equipment		139,415		$ 131,019
Inventory Valuation Reserves		$ 16,200
2018 Restructuring Plan [Member] | Maximum | Subsequent Event
Subsequent Event [Line Items]
Additional restructuring costs expected during the remainder of 2018	$ 6,200
2018 Restructuring Plan [Member] | Minimum | Subsequent Event
Subsequent Event [Line Items]
Additional restructuring costs expected during the remainder of 2018	4,900
Scenario, Forecast | 2018 Restructuring Plan [Member] | Maximum | Subsequent Event
Subsequent Event [Line Items]
Payments for Restructuring	2,500
Scenario, Forecast | 2018 Restructuring Plan [Member] | Minimum | Subsequent Event
Subsequent Event [Line Items]
Payments for Restructuring	$ 2,000