MACOM Technology Solutions (MTSI) 10-Q 29 Jan 20 2020 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Jan. 03, 2020	Jan. 24, 2020
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jan. 3, 2020
Document Transition Report	false
Entity File Number	001-35451
Entity Registrant Name	MACOM Technology Solutions Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-0306875
Entity Address, Address Line One	100 Chelmsford Street
Entity Address, City or Town	Lowell
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01851
City Area Code	978
Local Phone Number	656-2500
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	MTSI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		66,324,332
Entity Central Index Key	0001493594
Amendment Flag	false
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Statement of Financial Position [Abstract]
Deferred Revenue, Current	$ 7,094	$ 2,137
Current assets:
Cash and cash equivalents	108,184	75,519
Short-term investments	101,879	101,226
Accounts receivable (less allowances of $4,470 and $5,047, respectively)	51,777	69,790
Inventories	106,857	107,880
Income tax receivable	16,729	16,661
Prepaid and other current assets	25,208	27,506
Total current assets	410,634	398,582
Property and equipment, net	129,979	132,647
Goodwill	314,598	314,727
Intangible assets, net	168,154	181,228
Deferred income taxes	43,322	43,812
Other investments	19,864	23,613
Other long-term assets	45,656	10,965
TOTAL ASSETS	1,132,207	1,105,574
Finance lease liabilities	1,732	1,084
Current liabilities:
Current portion of long-term debt	6,885	6,885
Accounts payable	24,327	24,822
Accrued liabilities	54,601	39,908
Total current liabilities	94,639	74,836
Finance lease liabilities	29,929	29,506
Long-term debt, less current portion	654,497	655,272
Warrant liability	16,451	12,364
Deferred income taxes	640	632
Other long-term liabilities	42,531	19,068
Total liabilities	838,687	791,678
Stockholders’ equity:
Common stock	66	66
Treasury stock, at cost	(330)	(330)
Accumulated other comprehensive income	4,189	4,358
Additional paid-in capital	1,111,606	1,101,576
Accumulated deficit	(822,011)	(791,774)
Total stockholders’ equity	293,520	313,896
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,132,207	$ 1,105,574

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 4,470	$ 5,047

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Income Statement [Abstract]
Revenue	$ 119,097	$ 150,689
Cost of revenue	60,893	74,064
Gross profit	58,204	76,625
Operating expenses:
Research and development	35,158	43,525
Selling, general and administrative	32,340	42,519
Restructuring charges	1,234	4,978
Total operating expenses	68,732	91,022
Loss from operations	(10,528)	(14,397)
Other (expense) income
Warrant liability (expense) gain	(4,087)	5,468
Interest expense, net	(8,621)	(8,773)
Other expense	(3,740)	(4,569)
Total other expense, net	(16,448)	(7,874)
Loss before income taxes	(26,976)	(22,271)
Income tax expense	1,386	1,125
Net loss	$ (28,362)	$ (23,396)
Basic loss per share:
Loss per share - basic	$ (0.43)	$ (0.36)
Diluted loss per share:
Loss per share - diluted	$ (0.43)	$ (0.44)
Shares used:
Basic (in shares)	66,240	65,277
Diluted (in shares)	66,240	65,444

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (28,362)	$ (23,396)
Unrealized gain (loss) on short-term investments, net of tax	79	(256)
Foreign currency translation (loss) gain, net of tax	(248)	909
Other comprehensive (loss) income, net of tax	(169)	653
Total comprehensive loss	$ (28,531)	$ (22,743)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income	Additional Paid-in Capital	Accumulated Deficit
Balance at beginning of period (in shares) at Sep. 28, 2018		65,202,000
Balance at beginning of period at Sep. 28, 2018	$ 668,675	$ 65	$ (330)	$ 2,188	$ 1,074,728	$ (407,976)
Balance at beginning of period (in shares) at Sep. 28, 2018			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)	100
Vesting of restricted common stock and units (in shares)		55,000
Issuance of common stock pursuant to employee stock purchase plan (in shares)		156,000
Issuance of common stock pursuant to employee stock purchase plan	$ 2,392				2,392
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(18,000)
Shares repurchased for tax withholdings on equity awards	(341)				(341)
Share-based compensation	9,273				9,273
Other comprehensive loss, net of tax	653			653
Net loss	(23,396)					(23,396)
Balance at end of period (in shares) at Dec. 28, 2018		65,395,000
Balance at end of period at Dec. 28, 2018	657,256	$ 65	$ (330)	2,841	1,086,052	(431,372)
Balance at end of period (in shares) at Dec. 28, 2018			(23,000)
Balance at beginning of period (in shares) at Sep. 27, 2019		66,177,000
Balance at beginning of period at Sep. 27, 2019	$ 313,896	$ 66	$ (330)	4,358	1,101,576	(791,774)
Balance at beginning of period (in shares) at Sep. 27, 2019			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)	2,620	3,000
Stock options exercises	$ 43				43
Vesting of restricted common stock and units (in shares)		10,000
Vesting of restricted common stock and units	0	$ 0
Issuance of common stock pursuant to employee stock purchase plan (in shares)		160,000
Issuance of common stock pursuant to employee stock purchase plan	1,930				1,930
Shares repurchased for stock withholdings on restricted stock awards (in shares)		(4,000)
Shares repurchased for tax withholdings on equity awards	(93)				(93)
Share-based compensation	8,150				8,150
Other comprehensive loss, net of tax	(169)			(169)
Net loss	(28,362)					(28,362)
Balance at end of period (in shares) at Jan. 03, 2020		66,346,000
Balance at end of period at Jan. 03, 2020	293,520	$ 66	$ (330)	$ 4,189	1,111,606	(822,011)
Balance at end of period (in shares) at Jan. 03, 2020			(23,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of ASU 2016-09	$ (1,875)				$ 0	$ (1,875)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (28,362)	$ (23,396)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and intangibles amortization	20,503	28,184
Share-based compensation	8,150	9,273
Warrant liability loss (gain)	4,087	(5,468)
Deferred financing cost amortization	1,015	1,015
Deferred income taxes	487	27
Impairment and restructuring related	0	2,746
Loss on minority equity investment	3,749	4,556
Other adjustments, net	(477)	214
Change in operating assets and liabilities:
Accounts receivable	18,013	(12,308)
Inventories	1,023	1,985
Prepaid expenses and other assets	5,675	2,584
Accounts payable	(1,710)	(6,905)
Accrued and other liabilities	4,956	145
Income taxes	549	257
Net cash provided by operating activities	37,658	2,909
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses, net	0	(375)
Purchases of property and equipment	(4,248)	(11,521)
Proceeds from sales and maturities of short-term investments	77,211	68,034
Purchases of short-term investments	(77,504)	(68,484)
Net cash used in investing activities	(4,541)	(12,346)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from stock option exercises and employee stock purchases	1,973	2,392
Payments on notes payable	(1,721)	0
Financing cash flows from finance leases	751	185
Repurchase of common stock - tax withholdings on equity awards	(93)	(341)
Net cash (used in) provided by financing activities	(592)	1,866
Foreign currency effect on cash	140	(16)
NET CHANGE IN CASH AND CASH EQUIVALENTS	32,665	(7,587)
CASH AND CASH EQUIVALENTS — Beginning of period	75,519	94,676
CASH AND CASH EQUIVALENTS — End of period	$ 108,184	$ 87,089

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Jan. 03, 2020
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 (the “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 statements 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 condensed consolidated balance sheet as of September 27, 2019 is as reported in our audited consolidated financial statements as of that date. Our accounting policies are described in the notes to our September 27, 2019 condensed consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 27, 2019 filed with the SEC on November 26, 2019 (the "2019 Annual Report on Form 10-K"). We recommend that the financial statements included in this Quarterly Report on Form 10-Q be read in conjunction with the condensed consolidated financial statements and notes included in our 2019 Annual Report on Form 10-K. Principles of Consolidation— The accompanying condensed 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. Fiscal year 2020 includes 53 weeks and fiscal year 2019 includes 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first quarter. Our quarter ended January 3, 2020 includes 14 weeks. Use of Estimates —The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, 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 2019 Annual Report on Form 10-K. Pronouncements Adopted in Fiscal Year 2020 On September 28, 2019, the first day of our fiscal year 2020, the Company adopted Accounting Standards Update (“ASU”) 2016-02, Leases (“ASC 842”), which requires lease arrangements be presented on the lessee’s balance sheet by recording a right-of-use asset and a lease liability equal to the present value of related future minimum lease payments. The Company adopted the new lease guidance using the modified retrospective approach and the transition method available in accordance with ASU 2018-11, Leases (Topic 842): Targeted Improvements , which provides the option to use the effective date as the date of initial application of the guidance. As a result, the comparative information for prior periods has not been adjusted and continues to be reported in accordance with the accounting standards in effect for those periods under the previously applicable guidance. The Company elected the "practical expedients package of three" permitted under the transition guidance within ASC 842, which permitted the Company to carry forward its historical assessments of whether contracts contain leases, lease classification, and initial direct costs, for leases in existence prior to September 28, 2019. The Company evaluated its identified leases and applied the new lease guidance as discussed in Note 8 , "Leases". At the effective date, the adoption of ASC 842 resulted in an increase to the our total assets of approximately $37.1 million , an increase to total liabilities of approximately $39.0 million and a decrease to retained earnings of approximately $1.9 million primarily due to derecognition of financing obligations and associated assets established under ASC 840, Leases . Existing obligations associated with deferred rent and lease incentives of approximately $6.1 million were recorded as a reduction to our gross operating lease right-of-use assets. The adoption of the new lease guidance did not have a material impact to the condensed consolidated statement of operations or cash flows, or earnings per common share for the three months ended January 3, 2020 .

Revenue (Notes)

Revenue (Notes)	3 Months Ended
	Jan. 03, 2020
Revenue [Abstract]
Revenue from Contract with Customer [Text Block]	. REVENUE Disaggregation of Revenue We disaggregate revenue from contracts with customers by markets and geography, as we believe it best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The following tables present our revenue disaggregated by markets and geography (in thousands): Three Months Ended January 3, 2020 December 28, 2018 Revenue by Market: Telecommunications $ 45,602 $ 50,159 Industrial & Defense 50,482 57,283 Data Center 23,013 43,247 Total $ 119,097 $ 150,689 Three Months Ended January 3, 2020 December 28, 2018 Revenue by Geographic Region: United States $ 53,951 $ 68,118 China 37,341 44,622 Asia Pacific, excluding China (1) 18,820 23,415 Other Countries (2) 8,985 14,534 Total $ 119,097 $ 150,689 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Australia, Malaysia, New Zealand and the Philippines. (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. Contract Balances We record contract assets or contract liabilities depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis. Our contract liabilities primarily relate to deferred revenue, including advance consideration received from customers for contracts prior to the transfer of control to the customer, and therefore revenue is recognized upon delivery of products and services. The following table presents the changes in contract liabilities during the three months ended January 3, 2020 (in thousands): January 3, 2020 September 27, 2019 $ Change % Change Contract liabilities $ 10,610 $ 10,653 $ (43 ) — % As of January 3, 2020 , approximately $3.5 million of our contract liabilities were recorded as other long-term liabilities on our balance sheet with the remainder recorded as deferred revenue. The decrease in contract liabilities during the three months ended January 3, 2020 , as shown in the table above, was primarily from the recognition of revenue deferred for funds received prior to when certain of our customers obtain control of the product or services. During the three months ended January 3, 2020 , we recognized net sales of $0.1 million that were included in the contract liabilities balance at the beginning of the period.

Short Term Investments

Short Term Investments	3 Months Ended
	Jan. 03, 2020
Investments, Debt and Equity Securities [Abstract]
Investments	INVESTMENTS Our short-term investments include 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 are summarized in the tables below (in thousands): January 3, 2020 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 29,705 $ 134 $ (27 ) $ 29,812 Commercial paper 72,093 2 (28 ) 72,067 Total short-term investments $ 101,798 $ 136 $ (55 ) $ 101,879 September 27, 2019 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 29,578 $ 112 $ (93 ) $ 29,597 Commercial paper 71,646 1 (18 ) 71,629 Total short-term investments $ 101,224 $ 113 $ (111 ) $ 101,226 The contractual maturities of available-for-sale investments were as follows (in thousands): January 3, 2020 September 27, 2019 Less than 1 year $ 75,904 $ 75,233 Over 1 year 25,975 25,993 Total short-term investments $ 101,879 $ 101,226 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 January 3, 2020 , we held an investment in a Series B preferred stock ownership of a privately held manufacturing corporation with preferred liquidation rights over other equity shares. As the equity securities do not have a readily determinable fair value and do not qualify for the practical expedient under ASC 820, Fair Value Measurement, we have elected to account for this investment at cost less any impairment. As of January 3, 2020 , the cost of this investment was $5.0 million . We evaluate this investment for impairment at each balance sheet date, and through January 3, 2020 , no impairment has been recorded for this investment. Also included in long-term investments is a minority investment of less than 20.0% in the outstanding equity of a private company ("Compute") that was acquired in conjunction with the divestiture of the Compute business during the fiscal year 2018. This investment value is updated quarterly based on our proportionate share of the losses or earnings, as well as any changes in Compute's equity, utilizing the equity method. During the three months ended January 3, 2020 and December 28, 2018 , we recorded losses of $3.7 million and $4.6 million , respectively, associated with this investment as Other expense in our condensed consolidated statements of operations. As of January 3, 2020 and September 27, 2019 , the carrying value of this investment was $14.9 million and $18.6 million

Inventories

Inventories	3 Months Ended
	Jan. 03, 2020
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories, consist of the following (in thousands): January 3, September 27, Raw materials $ 55,579 $ 59,184 Work-in-process 14,806 13,799 Finished goods 36,472 34,897 Total inventory, net $ 106,857 $ 107,880

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
	Jan. 03, 2020
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	PROPERTY AND EQUIPMENT Property and equipment consists of the following (in thousands): January 3, September 27, Construction in process $ 18,995 $ 24,848 Machinery and equipment 184,694 175,696 Leasehold improvements 20,738 12,962 Furniture and fixtures 3,737 3,716 Computer equipment and software 18,343 18,116 Capital lease and financed assets — 46,496 Finance lease assets 36,312 — Total property and equipment $ 282,819 $ 281,834 Less accumulated depreciation and amortization (152,840 ) (149,187 ) Property and equipment, net $ 129,979 $ 132,647 Depreciation and amortization expense related to property, plant and equipment for the three months ended January 3, 2020 and December 28, 2018 were $7.4 million and $7.6 million , respectively. Accumulated amortization on finance right-of-use assets as of January 3, 2020 was $0.8 million . Accumulated depreciation on capital leases as of September 27, 2019 was $5.3 million .

Debt

Debt	3 Months Ended
	Jan. 03, 2020
Debt Disclosure [Abstract]
Debt	DEBT As of January 3, 2020 , 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”). As of January 3, 2020 , the Credit Agreement consisted of term loans with an initial aggregate principal amount of $700.0 million (the “Term Loans”) and a revolving credit facility with an aggregate borrowing capacity of $160.0 million (the "Revolving Facility"). 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 January 3, 2020 , for the Credit Agreement were as follows (in thousands, except rate data): Principal Outstanding LIBOR Rate Margin Effective Interest Rate Term loans $671,250 1.80% 2.25% 4.05% As of January 3, 2020 , approximately $7.3 million of deferred financing costs remain unamortized, of which $6.8 million is related to the Term Loans and is recorded as a direct reduction of the recognized debt liabilities in our accompanying condensed consolidated balance sheet, and $0.5 million is related to the Revolving Facility and is recorded in other long-term assets in our accompanying condensed 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. The Term Loans are payable in quarterly principal installments of approximately $1.7 million on the last business day of each calendar quarter, with the remainder due on the maturity date. In the event that we divest a business, the net cash proceeds of the divestment are generally required, subject to certain exceptions, to be applied to repayment of outstanding Term Loans except to the extent we reinvest such proceeds in assets useful for our business within 18 months of receiving the proceeds. If we enter into a binding agreement to reinvest such proceeds within 18 months of receiving them, we have until the later of 18 months following our receipt of the proceeds and six months following the date of such agreement to complete the reinvestment. As of January 3, 2020 , we had $160.0 million of borrowing capacity under our Revolving Facility. As of January 3, 2020 , the following remained outstanding on the Term Loans (in thousands): January 3, 2020 Principal balance $ 671,250 Unamortized discount (3,112 ) Unamortized deferred financing costs (6,756 ) Total term loans 661,382 Current portion 6,885 Long-term, less current portion $ 654,497 As of January 3, 2020 , the minimum principal payments under the Term Loans in future fiscal years were as follows (in thousands): Amount 2020 (remainder of fiscal year) $ 5,163 2021 6,885 2022 6,885 2023 6,885 2024 645,432 Total $ 671,250 The fair value of the Term Loans was estimated to be approximately $637.7 million as of January 3, 2020 , and was determined using Level 2 inputs, including a quoted rate from a financial institution.

Leases Leases

Leases Leases	3 Months Ended
	Jan. 03, 2020
Leases [Abstract]
Leases	LEASES We have operating leases for certain facilities, as well as manufacturing and office equipment. We have financing leases for our corporate headquarters and to a lesser extent, various manufacturing equipment. These leases expire at various dates through 2038 , and certain of these leases have renewal options with the longest ranging up to two , ten-year periods. We determine that a contract contains a lease at lease inception if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. In evaluating whether the right to control an identified asset exists, we assess whether we have the right to direct the use of the identified asset and obtain substantially all of the economic benefit from the use of the identified asset. Leases with a term greater than one year are recognized on the balance sheet as right-of-use assets and lease liabilities. For leases with a term of one year or less (“short-term leases”), we elected not to recognize the lease liability for these arrangements and the lease payments are recognized in the condensed consolidated statement of operations on a straight-line basis over the lease term. Right-of-use assets and lease liabilities are recognized at the present value of future minimum lease payments over the lease term on the commencement date. Right-of-use assets are initially measured as the amount of the initial lease liability, adjusted for initial direct costs, lease payments made at or before the commencement date, and reduced by lease incentives received. We include options to renew or terminate when determining the lease term when it is reasonably certain that the option will be exercised. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. Our leases may contain lease and non-lease components. We elected to account for lease and non-lease components in a contract as part of a single lease component. Fixed payments are considered part of the single lease component and included in the right-of-use assets and lease liabilities. Additionally, lease contracts typically include variable payments and other costs that do not transfer a separate good or service, such as reimbursement for real estate taxes and insurance, which are expensed as incurred. Our leases generally do not provide an implicit interest rate. As a result, we utilize our incremental borrowing rates, which are the rates incurred to borrow on a collateralized basis over a similar term and amount equal to the lease payments in a similar economic environment. Included in our condensed consolidated balance sheets were the following amounts related to operating and finance lease assets and liabilities (in thousands): January 3, 2020 September 27, 2019 Consolidated Balance Sheet Classification Assets: Operating lease right-of-use assets $ 35,622 — Other long-term assets Finance lease assets 35,535 $ — Property, plant and equipment, net Capital lease and financed assets — $ 40,442 Property, plant and equipment, net Total lease assets $ 71,157 $ 40,442 Liabilities: Current: Operating lease liabilities $ 7,570 $ — Accrued liabilities Finance lease liabilities 1,732 $ — Current portion of finance lease obligations Capital lease and financing obligations — 1,084 Current portion of finance lease obligations Long-term: Operating lease liabilities 33,737 — Other long-term liabilities Finance lease liabilities 29,929 — Finance lease obligations, less current portion Capital lease and financing obligations — 29,506 Finance lease obligations, less current portion Total lease liabilities $ 72,968 $ 30,590 The weighted-average remaining lease terms and weighted-average discount rates for operating and finance leases as of January 3, 2020 were as follows: January 3, 2020 Weighted-average remaining lease term (in years): Operating leases 6.83 Finance leases 17.26 Weighted-average discount rate: Operating leases 6.37 % Finance leases 6.74 % The components of lease expense were as follows (in thousands): Three Months Ended January 3, 2020 Finance lease cost: Amortization of lease assets $ 777 Interest on lease liabilities 584 Total finance lease cost $ 1,361 Operating lease cost $ 2,483 Variable lease cost 377 Short-term lease cost 85 Sublease income (242 ) Cash paid for amounts included in the measurement of lease liabilities were as follows (in thousands): Three Months Ended January 3, 2020 Cash paid for amounts included in measurement of lease liabilities: Operating cash flows from operating leases $ 2,001 Operating cash flows from finance leases 584 Financing cash flows from finance leases 751 Non-cash activities: Operating lease right-of-use assets obtained in exchange for new lease liabilities $ 74 Financing lease assets obtained in exchange for new lease liabilities 586 As of January 3, 2020 , maturities of lease liabilities by fiscal year were as follows (in thousands): Fiscal year ending: Operating Leases Finance Leases 2020 (remainder of fiscal year) $ 7,543 $ 2,954 2021 9,090 3,375 2022 6,769 2,602 2023 6,070 2,816 2024 5,573 2,853 2025 4,119 3,002 Thereafter 12,335 37,152 Total lease payments 51,499 54,754 Less: interest (10,192 ) (23,093 ) Present value of lease liabilities $ 41,307 $ 31,661 As of September 27, 2019, future minimum lease payments under the Company’s operating and capital leases were as follows as determined in accordance with the previous guidance under ASC 840 and as previously disclosed in our 2019 Annual Report on Form 10-K (in thousands): Fiscal year ending: Operating Leases Capital Leases 2020 $ 9,987 $ 3,299 2021 9,233 3,343 2022 7,447 2,884 2023 6,061 2,816 2024 5,564 2,853 Thereafter 16,437 39,927 Total future minimum lease payments $ 54,729 55,122 Less amount representing interest (26,241 ) Present value of net minimum capital lease payments $ 28,881

Intangible Assets

Intangible Assets	3 Months Ended
	Jan. 03, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	INTANGIBLE ASSETS Amortization expense related to intangible assets is as follows (in thousands): Three Months Ended January 3, December 28, Cost of revenue $ 4,420 $ 8,052 Selling, general and administrative 8,654 12,519 Total $ 13,074 $ 20,571 Intangible assets consist of the following (in thousands): January 3, September 27, Acquired technology $ 179,434 $ 179,682 Customer relationships 245,870 245,870 Trade name (indefinite-lived) 3,400 3,400 Total $ 428,704 $ 428,952 Less accumulated amortization (260,550 ) (247,724 ) Intangible assets — net $ 168,154 $ 181,228 A summary of the activity in gross intangible assets and goodwill is as follows (in thousands): Intangible Assets Total Intangible Assets Acquired Technology Customer Trade Name Goodwill Balance at September 27, 2019 $ 428,952 $ 179,682 $ 245,870 $ 3,400 $ 314,727 Disposal of a fully amortized intangible asset (248 ) (248 ) — — Currency translation adjustment — — — — (129 ) Balance at January 3, 2020 $ 428,704 $ 179,434 $ 245,870 $ 3,400 $ 314,598 As of January 3, 2020 , our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands): 2020 Remaining 2021 2022 2023 2024 Thereafter Total Amortization expense $ 37,256 46,213 33,433 26,048 15,410 6,394 $ 164,754 Accumulated amortization for acquired technology and customer relationships were $139.0 million and $121.6 million , respectively, as of January 3, 2020 , and $134.8 million and $112.9 million , respectively, as of September 27, 2019 .

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Jan. 03, 2020
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 January 3, 2020 . 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 on 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 January 3, 2020 , 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 record the estimated fair values of the warrants as a long-term liability in the accompanying condensed consolidated financial statements with changes in the estimated fair value being recorded in the accompanying statements of operations. See Note 4 - Fair Value for additional information related to the fair value of our warrant liability. See Note 11 - Earnings (Loss) Per Share for impact of the common stock warrants on loss per share.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	3 Months Ended
	Jan. 03, 2020
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 January 3, 2020 December 28, 2018 Numerator: Net loss $ (28,362 ) $ (23,396 ) Warrant liability gain — (5,468 ) Net loss attributable to common stockholders $ (28,362 ) $ (28,864 ) Denominator: Weighted average common shares outstanding-basic 66,240 65,277 Dilutive effect of warrants — 167 Weighted average common shares outstanding-diluted 66,240 $ 65,444 Loss per share-basic: Net loss to common stockholders per share-basic $ (0.43 ) $ (0.36 ) Loss per share-diluted: Net loss to common stockholders per share-diluted $ (0.43 ) $ (0.44 ) As of January 3, 2020 , we had warrants outstanding which were reported as a liability on the condensed consolidated balance sheet. During the three months ended January 3, 2020 and the three months ended December 28, 2018 , we recorded $4.1 million of warrant losses and $5.5 million of warrant gains, respectively, associated with adjusting the fair value of the warrants in the condensed 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 the dilutive effect of outstanding common stock equivalents, including adjustment to the numerator for the dilutive effect of contracts that must be settled in stock. During the three months ended December 28, 2018 , we adjusted the numerator by the warrant gains of $5.5 million , and the denominator by the incremental shares 166,750 , under the treasury stock method. The table above excludes the effects of 1,292,101 shares for the three months ended January 3, 2020 , and 129,041 shares for the three months ended December 28, 2018 , respectively, of potential shares of common stock issuable upon exercise of stock options, warrants, restricted stock and restricted stock units, as applicable, as the inclusion would be antidilutive.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Jan. 03, 2020
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. We were not involved in any material pending legal proceedings during the fiscal quarter ended January 3, 2020 .

Prepaids and Other Current Asse

Prepaids and Other Current Assets Prepaids and Other Current Assets - USD ($) $ in Millions	May 10, 2018	Jan. 03, 2020
Discontinued Operations and Disposal Groups [Abstract]
Sale of businesses and assets	$ 5
Other Receivables, Net, Current		$ 14
Disposal Group, Including Discontinued Operation, Other Assets, Current		0.6
Disposal Group, Including Discontinued Operation, Consideration		17.2
Disposal Group, Including Discontinued Operation, Transition Services Reimbursement To Be Received		1.5
Allowance for Doubtful Other Receivables, Current		0.3
Disposal Group, Including Discontinued Operation, Additional Consideration Expected To Be Received		$ 11.9

Restructurings

Restructurings	3 Months Ended
	Jan. 03, 2020
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. The following is a summary of the restructuring charges incurred under the plans noted below (in thousands): Three Months Ended January 3, December 28, Employee related expenses $ 1,160 $ 1,153 Facility related expenses 74 3,825 Total restructuring charges $ 1,234 $ 4,978 The following is rollforward of the accrued restructuring liabilities for the three months ended January 3, 2020 (in thousands): Employee-Related Expense (1) Facility-Related Expense (2) Total Balance as of September 27, 2019 $ 1,549 $ 978 $ 2,527 Charges and adjustments 1,160 74 $ 1,234 Charges paid/settled/other 27 (666 ) (639 ) Balance as of January 3, 2020 $ 2,736 $ 386 $ 3,122 (1) Primarily includes severance charges associated with the reduction of our workforce in certain facilities. (2) Primarily includes activities associated with the closure of certain facilities, including any associated asset impairments and contract termination costs. Ithaca Plan During the fiscal quarter ended December 28, 2018, we commenced a plan to exit certain production and product lines, primarily related to certain production facilities located in Ithaca, New York (the “Ithaca Plan”). We incurred restructuring charges of $5.0 million in the three months ended December 28, 2018 for the Ithaca Plan. This action was completed in fiscal year 2019 and no further costs will be incurred. The remaining charges were paid during the three months ended January 3, 2020 . Details of the Ithaca Plan activities during the three months ended January 3, 2020 are as follows: Employee-Related Expense Facility-Related Expense Total Balance as of September 27, 2019 $ 13 $ 70 $ 83 Charges and adjustments — (40 ) (40 ) Charges paid/settled (13 ) (30 ) (43 ) Balance as of January 3, 2020 $ — $ — $ — Design Facilities Plan During the fiscal quarter ended March 29, 2019, we committed to a plan to exit certain design facilities and activities (the “Design Facilities Plan”). This action was completed in fiscal year 2019 and no further costs will be incurred. The remaining charges are expected to be paid during fiscal year 2020 . Details of the Design Facilities Plan activities during the three months ended January 3, 2020 are as follows: Employee-Related Expense Facility-Related Expense Total Balance as of September 27, 2019 $ — $ 451 $ 451 Charges and adjustments — (18 ) (18 ) Charges paid/settled — (315 ) (315 ) Balance as of January 3, 2020 $ — $ 118 $ 118 2019 Plan During the fiscal quarter ended June 28, 2019, we committed to a plan to strategically realign, streamline and improve certain of our business and operations, including reducing our workforce by approximately 250 employees and exiting seven development facilities in France, Japan, the Netherlands, Florida, Massachusetts, New Jersey and Rhode Island. Additionally, we made the decision to no longer invest in the design and development of optical modules and subsystems for Data Center applications. We incurred restructuring charges of $1.3 million in the three months ended January 3, 2020 under this plan, including $1.2 million of employee-related costs and $0.1 million of other costs. We expect to incur restructuring costs of approximately $1.8 million to $2.0 million through fiscal year 2020 as we complete this restructuring action, including approximately $1.4 million to $1.6 million of employee-related costs and $0.4 million of facility-related costs. Employee-Related Expense Facility-Related Expense Total Balance as of September 27, 2019 $ 1,536 $ 457 $ 1,993 Charges and adjustments 1,160 132 1,292 Charges paid/settled/other 40 (321 ) (281 ) Balance as of January 3, 2020 $ 2,736 $ 268 $ 3,004

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Jan. 03, 2020
Share-based Payment Arrangement [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Stock Plans As of January 3, 2020 , we had 16.7 million shares available for issuance under our 2012 Omnibus Incentive Plan (as Amended and Restated) (the “2012 Plan”) and 3.8 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 awards (“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 four years to seven years . Certain of the share-based awards granted and outstanding as of January 3, 2020 are subject to accelerated vesting upon a change in control of the Company. Share-Based Compensation The following table shows a summary of share-based compensation expense included in the condensed consolidated statements of operations (in thousands): Three Months Ended January 3, December 28, Cost of revenue $ 962 $ 674 Research and development 2,907 2,822 Selling, general and administrative 4,281 5,777 Total share-based compensation expense $ 8,150 $ 9,273 As of January 3, 2020 , the total unrecognized compensation costs related to ISOs, RSAs and RSUs, including awards with time-based and performance-based vesting was $68.9 million , which we expect to recognize over a weighted-average period of 2.6 years. As of January 3, 2020 , total unrecognized compensation cost related to our Employee Stock Purchase Plan was $0.7 million . Stock Options A summary of stock option activity for the three months ended January 3, 2020 is as follows (in thousands, except per share amounts and contractual term): Number of Shares Weighted-Average Exercise Price per Share Weighted-Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Options outstanding - September 27, 2019 376 $ 13.58 Granted — — Exercised (3 ) 16.55 Forfeited, canceled or expired — — Options outstanding - January 3, 2020 373 $ 13.56 6.81 $ 4,676 Options vested and expected to vest - January 3, 2020 373 13.56 6.81 4,676 Options exercisable - January 3, 2020 89 $ 9.62 2.27 $ 1,458 Aggregate intrinsic value represents the difference between our closing stock price on January 3, 2020 and the exercise price of outstanding, in-the-money options. During the three months ended January 3, 2020 , there were 2,620 options exercised. During the three months ended December 28, 2018 , there were 100 options exercised. The total intrinsic value of options exercised was not material for the three months ended January 3, 2020 or the three months ended December 28, 2018 . Restricted Stock, Restricted Stock Units and Performance-Based Restricted Stock Units A summary of RSAs, RSUs and PRSUs activity for the three months ended January 3, 2020 is as follows: Number of RSAs, RSUs and PRSUs (in thousands) Weighted- Average Grate Date Fair Value Aggregate Intrinsic Value (in thousands) Balance at September 27, 2019 2,613 $ 21.81 $ 56,649 Granted 1,145 21.72 Vested and released (10 ) 32.20 Forfeited, canceled or expired (165 ) 23.84 Balance at January 3, 2020 3,583 $ 21.66 $ 93,467 RSAs, RSUs and PRSUs that vested during the three months ended January 3, 2020 and December 28, 2018 had fair value of $0.3 million and $1.0 million , respectively, as of the vesting date.

Income Taxes

Income Taxes	3 Months Ended
	Jan. 03, 2020
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. Our quarterly tax provision or benefit, and its quarterly estimate of the annual effective tax rate, are subject to significant variation due to several factors. These factors include variability in accurately predicting pre-tax income/loss, the mix of jurisdictions in which we operate, intercompany transactions, changes in how we do business, tax law developments, and relative changes in permanent tax benefits or expenses. Our effective tax rates for the three months ended January 3, 2020 and December 28, 2018 were (5.1)% and (5.1)% , respectively. Income tax expense for the three months ended January 3, 2020 and December 28, 2018 was $1.4 million and $1.1 million , respectively. The difference between the U.S. federal statutory income tax rate of 21% and our effective tax rates for the three months ended January 3, 2020 and December 28, 2018 was primarily driven by the continuation of a full valuation allowance against any benefit associated with U.S. losses and income taxed in foreign jurisdictions at generally lower tax rates and where we are not in a valuation allowance since it is expected that we will be in a taxable income position. 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 evidence, both positive and negative. We look at 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. Significant negative objective evidence in the form of adjusted cumulative losses in the U.S. over the three-year period ended January 3, 2020 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. Our deferred income tax asset balance as of January 3, 2020 and September 27, 2019 is primarily attributable to an initial $39.8 million deferred asset generated from an intra-entity transfer of a license for intellectual property during the quarter ended September 27, 2019. We expect this deferred tax asset to amortize over the life of the intellectual property. All earnings of foreign subsidiaries, other than M/A-COM Technology Solutions International Limited (“Cayman Islands subsidiary”), and M/A-COM Technology Solutions (UK) Limited (“UK subsidiary”), are considered indefinitely reinvested for the periods presented. During the fiscal quarter ended March 29, 2019, we changed our position for our Cayman Islands subsidiary to no longer have its earnings permanently reinvested. The balance of the unrecognized tax benefits remained at $0.3 million as of January 3, 2020 when compared to the balance as of September 27, 2019 . It is our policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During the quarter ended January 3, 2020 , we did not make any accrual or payment of interest and penalties due to our net operating loss carryforward position within the U.S., which would offset any adjustment. 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 enacted a wide range of changes to the U.S. corporate income tax system, many of which differ significantly from the provisions of the previous U.S. tax law. The Tax Act also transitions international taxation from a worldwide system with deferral to a modified territorial system and includes base erosion prevention measures on non-U.S. earnings, which has the effect of subjecting certain earnings of our foreign subsidiaries to U.S. taxation as global intangible low-taxed income. These changes became effective in our fiscal year beginning September 29, 2018.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Jan. 03, 2020
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION As of January 3, 2020 and December 28, 2018 , we had $1.5 million and $3.0 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 three months ended December 28, 2018 , we capitalized $1.1 million of net construction costs, of which $0.2 million was accounted for as a non-cash transaction as the costs were paid by the developer. The following is supplemental cash flow information regarding non-cash investing and financing activities (in thousands): Three Months Ended January 3, December 28, Cash paid for interest $ 7,624 $ 5,912 Cash paid for income taxes $ 377 $ 28

Geographic and Significant Cust

Geographic and Significant Customer Information	3 Months Ended
	Jan. 03, 2020
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 loss. We evaluate this assessment on an ongoing basis as facts and circumstances change and as of January 3, 2020 there were no changes to our conclusion. For information about our revenue in different geographic regions, based upon customer locations, see Note 2 - Revenue . Information about net property and equipment in different geographic regions is presented below (in thousands): As of January 3, September 27, United States $ 112,888 $ 116,037 Asia Pacific (1) 9,062 8,917 Other Countries (2) 8,029 7,693 Total $ 129,979 $ 132,647 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Malaysia, 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. 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 Revenue January 3, December 28, Customer A 16 % 15 % Accounts Receivable January 3, September 27, Customer A 25 % 24 % Customer B 10 % 10 % No other customer represented more than 10% of revenue or accounts receivable in the periods presented in the accompanying condensed consolidated financial statements. For the three months ended January 3, 2020 and December 28, 2018 , our top ten customers represented 60% and 61% of total revenue, respectively.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Jan. 03, 2020
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation— The accompanying condensed 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, Policy [Policy Text Block]	We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. Fiscal year 2020 includes 53 weeks and fiscal year 2019 includes 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first quarter. Our quarter ended January 3, 2020 includes 14 weeks.
Use of Estimates	Use of Estimates —The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods, and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, 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 2019 Annual Report on Form 10-K. Pronouncements Adopted in Fiscal Year 2020 On September 28, 2019, the first day of our fiscal year 2020, the Company adopted Accounting Standards Update (“ASU”) 2016-02, Leases (“ASC 842”), which requires lease arrangements be presented on the lessee’s balance sheet by recording a right-of-use asset and a lease liability equal to the present value of related future minimum lease payments. The Company adopted the new lease guidance using the modified retrospective approach and the transition method available in accordance with ASU 2018-11, Leases (Topic 842): Targeted Improvements , which provides the option to use the effective date as the date of initial application of the guidance. As a result, the comparative information for prior periods has not been adjusted and continues to be reported in accordance with the accounting standards in effect for those periods under the previously applicable guidance. The Company elected the "practical expedients package of three" permitted under the transition guidance within ASC 842, which permitted the Company to carry forward its historical assessments of whether contracts contain leases, lease classification, and initial direct costs, for leases in existence prior to September 28, 2019. The Company evaluated its identified leases and applied the new lease guidance as discussed in Note 8 , "Leases". At the effective date, the adoption of ASC 842 resulted in an increase to the our total assets of approximately $37.1 million , an increase to total liabilities of approximately $39.0 million and a decrease to retained earnings of approximately $1.9 million primarily due to derecognition of financing obligations and associated assets established under ASC 840, Leases . Existing obligations associated with deferred rent and lease incentives of approximately $6.1 million were recorded as a reduction to our gross operating lease right-of-use assets. The adoption of the new lease guidance did not have a material impact to the condensed consolidated statement of operations or cash flows, or earnings per common share for the three months ended January 3, 2020 .

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Jan. 03, 2020
Revenue [Abstract]
Disaggregation of Revenue	The following tables present our revenue disaggregated by markets and geography (in thousands): Three Months Ended January 3, 2020 December 28, 2018 Revenue by Market: Telecommunications $ 45,602 $ 50,159 Industrial & Defense 50,482 57,283 Data Center 23,013 43,247 Total $ 119,097 $ 150,689 Three Months Ended January 3, 2020 December 28, 2018 Revenue by Geographic Region: United States $ 53,951 $ 68,118 China 37,341 44,622 Asia Pacific, excluding China (1) 18,820 23,415 Other Countries (2) 8,985 14,534 Total $ 119,097 $ 150,689 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Australia, Malaysia, New Zealand and the Philippines. (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.
Contract with Customer, Asset and Liability	During the three months ended January 3, 2020 , we recognized net sales of $0.1 million that were included in the contract liabilities balance at the beginning of the period. The following table presents the changes in contract liabilities during the three months ended January 3, 2020 (in thousands): January 3, 2020 September 27, 2019 $ Change % Change Contract liabilities $ 10,610 $ 10,653 $ (43 ) — %

Short Term Investments (Tables)

Short Term Investments (Tables)	3 Months Ended
	Jan. 03, 2020
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 are summarized in the tables below (in thousands): January 3, 2020 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 29,705 $ 134 $ (27 ) $ 29,812 Commercial paper 72,093 2 (28 ) 72,067 Total short-term investments $ 101,798 $ 136 $ (55 ) $ 101,879 September 27, 2019 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Aggregate Fair Value Corporate bonds $ 29,578 $ 112 $ (93 ) $ 29,597 Commercial paper 71,646 1 (18 ) 71,629 Total short-term investments $ 101,224 $ 113 $ (111 ) $ 101,226
Summary of Contractual Maturities of Investments	The contractual maturities of available-for-sale investments were as follows (in thousands): January 3, 2020 September 27, 2019 Less than 1 year $ 75,904 $ 75,233 Over 1 year 25,975 25,993 Total short-term investments $ 101,879 $ 101,226

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Jan. 03, 2020
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): January 3, 2020 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 257 $ 257 $ — $ — Commercial paper 72,067 — 72,067 — Corporate bonds 29,812 — 29,812 — Total assets measured at fair value $ 102,136 $ 257 $ 101,879 $ — Liabilities Common stock warrant liability 16,451 — — 16,451 Total liabilities measured at fair value $ 16,451 $ — $ — $ 16,451 September 27, 2019 Fair Value Active Markets for Identical Assets (Level 1) Observable Inputs (Level 2) Unobservable Inputs (Level 3) Assets Money market funds $ 261 $ 261 $ — $ — Commercial paper 71,629 — 71,629 — Corporate bonds 29,597 — 29,597 — Total assets measured at fair value $ 101,487 $ 261 $ 101,226 $ — Liabilities Common stock warrant liability 12,364 — — 12,364 Total liabilities measured at fair value $ 12,364 $ — $ — $ 12,364
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 January 3, 2020 September 27, 2019 Warrant liability Black-Scholes model Volatility 55.1% 61.4% Discount rate 1.55% 1.71% Expected life 1.0 years 1.2 years Exercise price $14.05 $14.05 Stock price $26.08 $21.68 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 27, Net Realized/Unrealized Losses Included in Earnings Purchases and Issuances Sales and Settlements January 3, Common stock warrant liability $ 12,364 $ 4,087 $ — $ — $ 16,451 September 28, Net Realized/Unrealized Losses (Gains) Included in Earnings Purchases and Issuances Sales and Settlements December 28, Contingent consideration $ 585 $ 65 $ — $ — $ 650 Common stock warrant liability $ 13,129 $ (5,468 ) $ — $ — $ 7,661

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Jan. 03, 2020
Inventory Disclosure [Abstract]
Components of Inventories	Inventories, consist of the following (in thousands): January 3, September 27, Raw materials $ 55,579 $ 59,184 Work-in-process 14,806 13,799 Finished goods 36,472 34,897 Total inventory, net $ 106,857 $ 107,880

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Jan. 03, 2020
Property, Plant and Equipment [Abstract]
Components of Property, Plant and Equipment	Property and equipment consists of the following (in thousands): January 3, September 27, Construction in process $ 18,995 $ 24,848 Machinery and equipment 184,694 175,696 Leasehold improvements 20,738 12,962 Furniture and fixtures 3,737 3,716 Computer equipment and software 18,343 18,116 Capital lease and financed assets — 46,496 Finance lease assets 36,312 — Total property and equipment $ 282,819 $ 281,834 Less accumulated depreciation and amortization (152,840 ) (149,187 ) Property and equipment, net $ 129,979 $ 132,647

Debt (Tables)

Debt (Tables)	3 Months Ended
	Jan. 03, 2020
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	All principal amounts outstanding and interest rate information as of January 3, 2020 , for the Credit Agreement were as follows (in thousands, except rate data): Principal Outstanding LIBOR Rate Margin Effective Interest Rate Term loans $671,250 1.80% 2.25% 4.05%
Schedule of Remained Outstanding on Term Loans	As of January 3, 2020 , the following remained outstanding on the Term Loans (in thousands): January 3, 2020 Principal balance $ 671,250 Unamortized discount (3,112 ) Unamortized deferred financing costs (6,756 ) Total term loans 661,382 Current portion 6,885 Long-term, less current portion $ 654,497
Schedule of Minimum Principal Payments under Term Loans	As of January 3, 2020 , the minimum principal payments under the Term Loans in future fiscal years were as follows (in thousands): Amount 2020 (remainder of fiscal year) $ 5,163 2021 6,885 2022 6,885 2023 6,885 2024 645,432 Total $ 671,250

Leases (Tables)

Leases (Tables)	3 Months Ended
	Jan. 03, 2020
Leases [Abstract]
Assets and Liabilities of Lessee	Included in our condensed consolidated balance sheets were the following amounts related to operating and finance lease assets and liabilities (in thousands): January 3, 2020 September 27, 2019 Consolidated Balance Sheet Classification Assets: Operating lease right-of-use assets $ 35,622 — Other long-term assets Finance lease assets 35,535 $ — Property, plant and equipment, net Capital lease and financed assets — $ 40,442 Property, plant and equipment, net Total lease assets $ 71,157 $ 40,442 Liabilities: Current: Operating lease liabilities $ 7,570 $ — Accrued liabilities Finance lease liabilities 1,732 $ — Current portion of finance lease obligations Capital lease and financing obligations — 1,084 Current portion of finance lease obligations Long-term: Operating lease liabilities 33,737 — Other long-term liabilities Finance lease liabilities 29,929 — Finance lease obligations, less current portion Capital lease and financing obligations — 29,506 Finance lease obligations, less current portion Total lease liabilities $ 72,968 $ 30,590 The weighted-average remaining lease terms and weighted-average discount rates for operating and finance leases as of January 3, 2020 were as follows: January 3, 2020 Weighted-average remaining lease term (in years): Operating leases 6.83 Finance leases 17.26 Weighted-average discount rate: Operating leases 6.37 % Finance leases 6.74 %
Lease, Cost	Cash paid for amounts included in the measurement of lease liabilities were as follows (in thousands): Three Months Ended January 3, 2020 Cash paid for amounts included in measurement of lease liabilities: Operating cash flows from operating leases $ 2,001 Operating cash flows from finance leases 584 Financing cash flows from finance leases 751 Non-cash activities: Operating lease right-of-use assets obtained in exchange for new lease liabilities $ 74 Financing lease assets obtained in exchange for new lease liabilities 586 The components of lease expense were as follows (in thousands): Three Months Ended January 3, 2020 Finance lease cost: Amortization of lease assets $ 777 Interest on lease liabilities 584 Total finance lease cost $ 1,361 Operating lease cost $ 2,483 Variable lease cost 377 Short-term lease cost 85 Sublease income (242 )
Lessee, Operating Lease, Liability, Maturity	As of January 3, 2020 , maturities of lease liabilities by fiscal year were as follows (in thousands): Fiscal year ending: Operating Leases Finance Leases 2020 (remainder of fiscal year) $ 7,543 $ 2,954 2021 9,090 3,375 2022 6,769 2,602 2023 6,070 2,816 2024 5,573 2,853 2025 4,119 3,002 Thereafter 12,335 37,152 Total lease payments 51,499 54,754 Less: interest (10,192 ) (23,093 ) Present value of lease liabilities $ 41,307 $ 31,661
Finance Lease, Liability, Maturity	As of January 3, 2020 , maturities of lease liabilities by fiscal year were as follows (in thousands): Fiscal year ending: Operating Leases Finance Leases 2020 (remainder of fiscal year) $ 7,543 $ 2,954 2021 9,090 3,375 2022 6,769 2,602 2023 6,070 2,816 2024 5,573 2,853 2025 4,119 3,002 Thereafter 12,335 37,152 Total lease payments 51,499 54,754 Less: interest (10,192 ) (23,093 ) Present value of lease liabilities $ 41,307 $ 31,661
Schedule of Future Minimum Lease Payments for Operating and Capital Leases	As of September 27, 2019, future minimum lease payments under the Company’s operating and capital leases were as follows as determined in accordance with the previous guidance under ASC 840 and as previously disclosed in our 2019 Annual Report on Form 10-K (in thousands): Fiscal year ending: Operating Leases Capital Leases 2020 $ 9,987 $ 3,299 2021 9,233 3,343 2022 7,447 2,884 2023 6,061 2,816 2024 5,564 2,853 Thereafter 16,437 39,927 Total future minimum lease payments $ 54,729 55,122 Less amount representing interest (26,241 ) Present value of net minimum capital lease payments $ 28,881

Intangible Assets (Tables)

Intangible Assets (Tables)	3 Months Ended
	Jan. 03, 2020
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 January 3, December 28, Cost of revenue $ 4,420 $ 8,052 Selling, general and administrative 8,654 12,519 Total $ 13,074 $ 20,571
Summary of Intangible Assets	Intangible assets consist of the following (in thousands): January 3, September 27, Acquired technology $ 179,434 $ 179,682 Customer relationships 245,870 245,870 Trade name (indefinite-lived) 3,400 3,400 Total $ 428,704 $ 428,952 Less accumulated amortization (260,550 ) (247,724 ) Intangible assets — net $ 168,154 $ 181,228
Summary of Activity in Intangible Assets and Goodwill	A summary of the activity in gross intangible assets and goodwill is as follows (in thousands): Intangible Assets Total Intangible Assets Acquired Technology Customer Trade Name Goodwill Balance at September 27, 2019 $ 428,952 $ 179,682 $ 245,870 $ 3,400 $ 314,727 Disposal of a fully amortized intangible asset (248 ) (248 ) — — Currency translation adjustment — — — — (129 ) Balance at January 3, 2020 $ 428,704 $ 179,434 $ 245,870 $ 3,400 $ 314,598
Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years	As of January 3, 2020 , our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands): 2020 Remaining 2021 2022 2023 2024 Thereafter Total Amortization expense $ 37,256 46,213 33,433 26,048 15,410 6,394 $ 164,754

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	3 Months Ended
	Jan. 03, 2020
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 January 3, 2020 December 28, 2018 Numerator: Net loss $ (28,362 ) $ (23,396 ) Warrant liability gain — (5,468 ) Net loss attributable to common stockholders $ (28,362 ) $ (28,864 ) Denominator: Weighted average common shares outstanding-basic 66,240 65,277 Dilutive effect of warrants — 167 Weighted average common shares outstanding-diluted 66,240 $ 65,444 Loss per share-basic: Net loss to common stockholders per share-basic $ (0.43 ) $ (0.36 ) Loss per share-diluted: Net loss to common stockholders per share-diluted $ (0.43 ) $ (0.44 )

Restructurings - (Tables)

Restructurings - (Tables)	3 Months Ended
	Jan. 03, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Costs	The following is a summary of the restructuring charges incurred under the plans noted below (in thousands): Three Months Ended January 3, December 28, Employee related expenses $ 1,160 $ 1,153 Facility related expenses 74 3,825 Total restructuring charges $ 1,234 $ 4,978
Schedule of Restructuring Reserve by Type of Cost	The following is rollforward of the accrued restructuring liabilities for the three months ended January 3, 2020 (in thousands): Employee-Related Expense (1) Facility-Related Expense (2) Total Balance as of September 27, 2019 $ 1,549 $ 978 $ 2,527 Charges and adjustments 1,160 74 $ 1,234 Charges paid/settled/other 27 (666 ) (639 ) Balance as of January 3, 2020 $ 2,736 $ 386 $ 3,122 Details of the Design Facilities Plan activities during the three months ended January 3, 2020 are as follows: Employee-Related Expense Facility-Related Expense Total Balance as of September 27, 2019 $ — $ 451 $ 451 Charges and adjustments — (18 ) (18 ) Charges paid/settled — (315 ) (315 ) Balance as of January 3, 2020 $ — $ 118 $ 118 Employee-Related Expense Facility-Related Expense Total Balance as of September 27, 2019 $ 1,536 $ 457 $ 1,993 Charges and adjustments 1,160 132 1,292 Charges paid/settled/other 40 (321 ) (281 ) Balance as of January 3, 2020 $ 2,736 $ 268 $ 3,004 Details of the Ithaca Plan activities during the three months ended January 3, 2020 are as follows: Employee-Related Expense Facility-Related Expense Total Balance as of September 27, 2019 $ 13 $ 70 $ 83 Charges and adjustments — (40 ) (40 ) Charges paid/settled (13 ) (30 ) (43 ) Balance as of January 3, 2020 $ — $ — $ —

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Jan. 03, 2020
Share-based Payment Arrangement [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 (in thousands): Three Months Ended January 3, December 28, Cost of revenue $ 962 $ 674 Research and development 2,907 2,822 Selling, general and administrative 4,281 5,777 Total share-based compensation expense $ 8,150 $ 9,273
Share-based Payment Arrangement, Option, Activity [Table Text Block]	A summary of stock option activity for the three months ended January 3, 2020 is as follows (in thousands, except per share amounts and contractual term): Number of Shares Weighted-Average Exercise Price per Share Weighted-Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Options outstanding - September 27, 2019 376 $ 13.58 Granted — — Exercised (3 ) 16.55 Forfeited, canceled or expired — — Options outstanding - January 3, 2020 373 $ 13.56 6.81 $ 4,676 Options vested and expected to vest - January 3, 2020 373 13.56 6.81 4,676 Options exercisable - January 3, 2020 89 $ 9.62 2.27 $ 1,458
Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity	A summary of RSAs, RSUs and PRSUs activity for the three months ended January 3, 2020 is as follows: Number of RSAs, RSUs and PRSUs (in thousands) Weighted- Average Grate Date Fair Value Aggregate Intrinsic Value (in thousands) Balance at September 27, 2019 2,613 $ 21.81 $ 56,649 Granted 1,145 21.72 Vested and released (10 ) 32.20 Forfeited, canceled or expired (165 ) 23.84 Balance at January 3, 2020 3,583 $ 21.66 $ 93,467

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Jan. 03, 2020
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): Three Months Ended January 3, December 28, Cash paid for interest $ 7,624 $ 5,912 Cash paid for income taxes $ 377 $ 28

Geographic and Significant Cu_2

Geographic and Significant Customer Information (Tables)	3 Months Ended
	Jan. 03, 2020
Segment Reporting [Abstract]
Summary of Different Geographic Regions	Information about net property and equipment in different geographic regions is presented below (in thousands): As of January 3, September 27, United States $ 112,888 $ 116,037 Asia Pacific (1) 9,062 8,917 Other Countries (2) 8,029 7,693 Total $ 129,979 $ 132,647 (1) Asia Pacific represents Taiwan, Japan, Singapore, India, Thailand, South Korea, Malaysia, the Philippines, Vietnam, and China. (2)
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 Revenue January 3, December 28, Customer A 16 % 15 % Accounts Receivable January 3, September 27, Customer A 25 % 24 % Customer B 10 % 10 %

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Sep. 28, 2019	Sep. 27, 2019
New Accounting Pronouncement, Early Adoption [Line Items]
Fiscal Period, Policy [Policy Text Block]	We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. Fiscal year 2020 includes 53 weeks and fiscal year 2019 includes 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first quarter. Our quarter ended January 3, 2020 includes 14 weeks.
Total lease assets	$ 71,157		$ 40,442
Cumulative effect of ASU 2016-02	$ (1,875)
Accounting Standards Update 2016-02
New Accounting Pronouncement, Early Adoption [Line Items]
Total lease assets		$ 37,100
Present value of lease liabilities		39,000
Cumulative effect of ASU 2016-02		1,900
Existing obligations recorded as reduction to gross operating right-of-use assets		$ 6,100

Revenue (Details)

Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Sep. 27, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 119,097	$ 150,689
Contract liabilities	10,610		$ 10,653
Increase (Decrease) in Contract with Customer, Liability	43
Contract liability noncurrent	3,500
Amounts included in contract liabilities at the beginning of the period	$ 100
Net change in contract liabilities (percentage)	0.00%
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue	$ 50,482	57,283
Data Center
Disaggregation of Revenue [Line Items]
Revenue	23,013	43,247
Telecom
Disaggregation of Revenue [Line Items]
Revenue	45,602	50,159
United States
Disaggregation of Revenue [Line Items]
Revenue	53,951	68,118
China
Disaggregation of Revenue [Line Items]
Revenue	37,341	44,622
Asia Pacific, excluding China
Disaggregation of Revenue [Line Items]
Revenue	18,820	23,415
Other Countries
Disaggregation of Revenue [Line Items]
Revenue	$ 8,985	$ 14,534

Investments - Summary of Availa

Investments - Summary of Available for Sale Investments (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 101,798	$ 101,224
Gross Unrealized Holding Gains	136	113
Gross Unrealized Holding Losses	(55)	(111)
Aggregate Fair Value	101,879	101,226
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,705	29,578
Gross Unrealized Holding Gains	134	112
Gross Unrealized Holding Losses	(27)	(93)
Aggregate Fair Value	29,812	29,597
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72,093	71,646
Gross Unrealized Holding Gains	2	1
Gross Unrealized Holding Losses	(28)	(18)
Aggregate Fair Value	$ 72,067	$ 71,629

Investments - Change in Availab

Investments - Change in Available for Sale Investments (Details) $ in Thousands	Jan. 03, 2020USD ($)
Movement in Available-for-sale Securities [Roll Forward]
Balance at beginning of period	$ 101,226
Balance at end of period	101,879
Corporate Debt Securities [Member]
Movement in Available-for-sale Securities [Roll Forward]
Balance at beginning of period	29,597
Balance at end of period	$ 29,812

Investments - Summary of Contra

Investments - Summary of Contractual Maturities of Investments (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Investments, Debt and Equity Securities [Abstract]
Less than 1 year	$ 75,904	$ 75,233
Over 1 year	25,975	25,993
Total short-term investments	$ 101,879	$ 101,226

Investments - Other Investments

Investments - Other Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Sep. 27, 2019
Debt Securities, Available-for-sale [Line Items]
Income (Loss) from Equity Method Investments	$ (3,749)	$ (4,556)
Equity Securities | Compute
Debt Securities, Available-for-sale [Line Items]
Income (Loss) from Equity Method Investments	(3,700)	$ (4,600)
Equity Method Investments	14,900		$ 18,600
Preferred Stock | Privately Held Manufacturing Company
Debt Securities, Available-for-sale [Line Items]
Investment cost basis	5,000
Other than Temporary Impairment Losses, Investments	$ 0
Compute | Equity Securities
Debt Securities, Available-for-sale [Line Items]
Noncontrolling interest ownership percentage	20.00%

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 102,136	$ 101,487
Total liabilities measured at fair value	16,451	12,364
Common stock warrant liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	16,451	12,364
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	29,812	29,597
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	257	261
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	72,067	71,629
Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	257	261
Total liabilities measured at fair value	0	0
Active Markets for Identical Assets (Level 1) | Common stock warrant liability
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) | Corporate bonds
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) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	257	261
Active Markets for Identical Assets (Level 1) | Commercial paper
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)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	101,879	101,226
Total liabilities measured at fair value	0	0
Observable Inputs (Level 2) | Common stock warrant liability
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) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	29,812	29,597
Observable Inputs (Level 2) | Money market funds
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) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	72,067	71,629
Unobservable Inputs (Level 3)
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	16,451	12,364
Unobservable Inputs (Level 3) | Common stock warrant liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities measured at fair value	16,451	12,364
Unobservable Inputs (Level 3) | Corporate bonds
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) | Money market funds
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) | Commercial paper
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) - Common stock warrant liability - Black-Scholes model	Jan. 03, 2020$ / shares	Sep. 27, 2019$ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and rights outstanding term	1 month	1 year 2 months 12 days
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0.0155	0.0171
Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0.551	0.614
Exercise price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	14.05	14.05
Stock price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	26.08	21.68
Dividend rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrant liability measurement input	0	0

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	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period		$ 585
Net Realized/Unrealized Losses Included in Earnings		65
Purchases and Issuances		0
Sales and Settlements		0
Balance at end of period		650
Common stock warrant liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 12,364	13,129
Net Realized/Unrealized Losses Included in Earnings	4,087	(5,468)
Purchases and Issuances	0	0
Sales and Settlements	0	0
Balance at end of period	$ 16,451	$ 7,661

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 55,579	$ 59,184
Work-in-process	14,806	13,799
Finished goods	36,472	34,897
Total inventory, net	$ 106,857	$ 107,880

Property Plant and Equipment -

Property Plant and Equipment - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 282,819	$ 281,834
Less accumulated depreciation and amortization	(152,840)	(149,187)
Property and equipment, net	129,979	132,647
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment	18,995	24,848
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	184,694	175,696
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	20,738	12,962
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	3,737	3,716
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	18,343	18,116
Capital lease and financed assets
Property, Plant and Equipment [Line Items]
Total property and equipment	0	46,496
Less accumulated depreciation and amortization		(5,300)
Assets Held Under Finance Leases [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 36,312	0
Less accumulated depreciation and amortization		$ (800)

Property Plant and Equipment _2

Property Plant and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Sep. 27, 2019
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 7,400	$ 7,600
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 152,840		$ 149,187
Assets Held Under Finance Leases [Member]
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment			$ 800

Debt - Additional Information (

Debt - Additional Information (Details)	3 Months Ended
	Jan. 03, 2020USD ($)
Debt Instrument [Line Items]
Principle amount	$ 700,000,000
Unamortized deferred financing costs	7,300,000
Term Loans
Debt Instrument [Line Items]
Unamortized deferred financing costs	6,756,000
Debt Instrument, Periodic Payment	$ 1,700,000
Debt Instrument, Payment Terms, Reinvestment Of Divestiture of Business Proceeds, Period	18 months
Debt Instrument, Payment Terms, Reinvestment Of Divestiture Of Business Proceeds, Transaction Completion, Period	6 months
Amount drawn	$ 661,382,000
Effective interest rate	4.05%
Principal balance	$ 671,250,000
Estimated fair value of Term Loans	637,700,000
Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized deferred financing costs	500,000
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
Fed Funds Effective Rate Overnight Index 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%

Debt Debt - Schedule of Long-te

Debt Debt - Schedule of Long-term Debt Instruments (Details) - Term Loans $ in Thousands	3 Months Ended
	Jan. 03, 2020USD ($)
Debt Instrument [Line Items]
Principal balance	$ 671,250
Effective interest rate	4.05%
LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Margin
Debt Instrument [Line Items]
Basis spread on variable rate	1.80%

Debt - Schedule of Remained Out

Debt - Schedule of Remained Outstanding on Term Loans (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ (7,300)
Current portion	6,885	$ 6,885
Long-term, less current portion	654,497	$ 655,272
Term Loans
Debt Instrument [Line Items]
Principal balance	671,250
Unamortized discount	(3,112)
Unamortized deferred financing costs	(6,756)
Total term loans	661,382
Current portion	6,885
Long-term, less current portion	$ 654,497

Debt - Schedule of Minimum Prin

Debt - Schedule of Minimum Principal Payments under Term Loans (Details) - Term Loans $ in Thousands	Jan. 03, 2020USD ($)
Debt Instrument [Line Items]
2020 (remainder of fiscal year)	$ 5,163
2021	6,885
2022	6,885
2023	6,885
2024	645,432
Total	$ 671,250

Leases Narrative (Details)

Leases Narrative (Details)	3 Months Ended
	Jan. 03, 2020renewal_option
Leases [Abstract]
Finance lease renewal term	10 years
Number of renewal options	2

Leases Assets and Liabilities o

Leases Assets and Liabilities of Lessee (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Assets:
Operating right-of-use assets	$ 35,622
Finance lease assets	35,535
Capital Leased Assets, Gross		$ 40,442
Total lease assets	71,157	40,442
Current:
Operating lease liabilities	7,570
Finance lease liabilities	1,732	1,084
Long-term:
Operating lease liabilities	33,737
Finance lease liabilities	29,929	29,506
Total lease liabilities	$ 72,968	$ 30,590

Leases Weighted-average Lease T

Leases Weighted-average Lease Term and Discount Rate (Details)	Jan. 03, 2020
Weighted Average Remaining Lease Term [Abstract]
Operating leases	6 years 9 months 29 days
Finance leases	17 years 3 months 3 days
Weighted-average discount rate:
Operating leases	6.37%
Finance leases	6.74%

Leases Lease Cost (Details)

Leases Lease Cost (Details) $ in Thousands	3 Months Ended
	Jan. 03, 2020USD ($)
Leases [Abstract]
Amortization of lease assets	$ 777
Interest on lease liabilities	584
Total finance lease cost	1,361
Operating lease cost	2,483
Variable lease cost	377
Short-term lease cost	85
Sublease income	$ (242)

Leases Supplemental Cash Flow I

Leases Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,001
Operating cash flows from finance leases	584
Financing cash flows from finance leases	751	$ 185
Non-cash activities:
Operating right-of-use assets obtained in exchange for new lease liabilities	74
Financing lease assets obtained in exchange for new lease liabilities	$ 586

Leases Lease Maturity Under Top

Leases Lease Maturity Under Topic 842 (Details) $ in Thousands	Jan. 03, 2020USD ($)
Operating Leases
2020	$ 7,543
2021	9,090
2022	6,769
2023	6,070
2024	5,573
2025	4,119
Thereafter	12,335
Total lease payments	51,499
Less: interest	(10,192)
Present value of lease liabilities	41,307
Finance Leases
2020	2,954
2021	3,375
2022	2,602
2023	2,816
2024	2,853
2025	3,002
Thereafter	37,152
Total lease payments	54,754
Less: interest	(23,093)
Present value of lease liabilities	$ 31,661

Leases FutureMinimumLeasePaymen

Leases FutureMinimumLeasePayments under Topic 840 (Details) $ in Thousands	Sep. 27, 2019USD ($)
Operating Leases
2020	$ 9,987
2021	9,233
2022	7,447
2023	6,061
2024	5,564
Thereafter	16,437
Total future minimum lease payments	54,729
Capital Leases
2020	3,299
2021	3,343
2022	2,884
2023	2,816
2024	2,853
Thereafter	39,927
Total future minimum lease payments	55,122
Less amount representing interest	(26,241)
Present value of net minimum capital lease payments	$ 28,881

Intangible Assets - Summary of

Intangible Assets - Summary of Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Finite-Lived Intangible Assets [Line Items]
Total	$ 13,074	$ 20,571
Cost of Revenue
Finite-Lived Intangible Assets [Line Items]
Total	4,420	8,052
Selling, General and Administrative
Finite-Lived Intangible Assets [Line Items]
Total	$ 8,654	$ 12,519

Intangible Assets - Summary o_2

Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Trade name (indefinite-lived)	$ 3,400	$ 3,400
Total	428,704	428,952
Less accumulated amortization	(260,550)	(247,724)
Intangible assets — net	168,154	181,228
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	179,434	179,682
Less accumulated amortization	(139,000)	(134,800)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	245,870	245,870
Less accumulated amortization	$ (121,600)	$ (112,900)

Intangible Assets - Summary o_3

Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Details) $ in Thousands	3 Months Ended
	Jan. 03, 2020USD ($)
Goodwill and Intangible Assets [Roll Forward]
Beginning Balance	$ 428,952
Currency translation adjustment	0
Ending Balance	428,704
Goodwill [Roll Forward]
Balance at beginning of period	314,727
Currency translation adjustment	(129)
Balance at end of period	314,598
Trade Names
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Beginning Balance	3,400
Currency translation adjustment	0
Ending Balance	3,400
Developed technology
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	179,682
Currency translation adjustment	0
Ending Balance	179,434
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	245,870
Currency translation adjustment	0
Ending Balance	245,870
LR4 [Member] | Disposal Group, Not Discontinued Operations [Member]
Goodwill and Intangible Assets [Roll Forward]
Disposal of a fully amortized intangible asset	(248)
Goodwill [Roll Forward]
Disposal of a fully amortized intangible asset	0
LR4 [Member] | Disposal Group, Not Discontinued Operations [Member] | Trade Names
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Disposal of a fully amortized intangible asset
LR4 [Member] | Disposal Group, Not Discontinued Operations [Member] | Developed technology
Finite-lived Intangible Assets [Roll Forward]
Disposal of a fully amortized intangible asset	(248)
LR4 [Member] | Disposal Group, Not Discontinued Operations [Member] | Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Disposal of a fully amortized intangible asset	$ 0

Intangible Assets - Summary o_4

Intangible Assets - Summary of Estimated Amortization of Intangible Assets (Details) $ in Thousands	Jan. 03, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020 Remaining	$ 37,256
2019	46,213
2020	33,433
2021	26,048
2022	15,410
Thereafter	6,394
Total	$ 164,754

Intangible Assets - Additional

Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 260,550	$ 247,724
Developed technology
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	139,000	134,800
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 121,600	$ 112,900

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - $ / shares	Jan. 03, 2020	Sep. 27, 2019	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 ($)	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Earnings Per Share [Abstract]
Fair Value Adjustment of Warrants	$ 4,087,000	$ (5,468,000)
Numerator:
Net loss	(28,362,000)	(23,396,000)
Warrant liability gain	0	(5,468,000)
Net loss attributable to common stockholders	$ (28,362,000)	$ (28,864,000)
Denominator:
Weighted average common shares outstanding-basic	66,240,000	65,277,000
Dilutive effect of options and warrants (in shares)	0	166,750
Weighted average common shares outstanding-diluted	66,240,000	65,444,000
Loss per share-basic:
Loss per share - basic	$ (0.43)	$ (0.36)
Loss per share-diluted:
Loss per share - diluted	$ (0.43)	$ (0.44)
Number of antidilutive shares of common stock excluded from the calculation (in shares)	1,292,101	129,041

Restructurings - Additional Inf

Restructurings - Additional Information (Details) $ in Thousands	3 Months Ended
	Jan. 03, 2020USD ($)	Jun. 28, 2019facilityemployee	Dec. 28, 2018USD ($)
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	$ 2,527
Charges and adjustments	1,234		$ 4,978
Charges paid/settled/other	(639)
Restructuring Reserve, Ending Balance	3,122
Restructuring and Related Cost, Number of Positions Eliminated | facility		7
Ithaca Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	83
Charges and adjustments	(40)		5,000
Charges paid/settled/other	(43)
Restructuring Reserve, Ending Balance	0
Design Facility Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	451
Charges and adjustments	(18)
Charges paid/settled/other	(315)
Restructuring Reserve, Ending Balance	118
2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	1,993
Charges and adjustments	1,292
Charges paid/settled/other	(281)
Restructuring Reserve, Ending Balance	3,004
Restructuring and Related Cost, Number of Positions Eliminated | employee		250
Minimum | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Additional restructuring costs expected during the remainder of 2019	1,800
Maximum | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Additional restructuring costs expected during the remainder of 2019	2,000
Employee related expenses
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	1,549
Charges and adjustments	1,160		1,153
Charges paid/settled/other	27
Restructuring Reserve, Ending Balance	2,736
Employee related expenses | Ithaca Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	13
Charges and adjustments	0
Charges paid/settled/other	(13)
Restructuring Reserve, Ending Balance	0
Employee related expenses | Design Facility Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	0
Charges and adjustments	0
Charges paid/settled/other	0
Restructuring Reserve, Ending Balance	0
Employee related expenses | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	1,536
Charges and adjustments	1,160
Charges paid/settled/other	40
Restructuring Reserve, Ending Balance	2,736
Employee related expenses | Minimum
Restructuring Reserve [Roll Forward]
Additional restructuring costs expected during the remainder of 2019	1,400
Employee related expenses | Maximum
Restructuring Reserve [Roll Forward]
Additional restructuring costs expected during the remainder of 2019	1,600
Facility related expenses
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	978
Charges and adjustments	74		$ 3,825
Charges paid/settled/other	(666)
Restructuring Reserve, Ending Balance	386
Additional restructuring costs expected during the remainder of 2019	400
Facility related expenses | Ithaca Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	70
Charges and adjustments	(40)
Charges paid/settled/other	(30)
Restructuring Reserve, Ending Balance	0
Facility related expenses | Design Facility Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	451
Charges and adjustments	(18)
Charges paid/settled/other	(315)
Restructuring Reserve, Ending Balance	118
Facility related expenses | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	457
Charges and adjustments	132
Charges paid/settled/other	(321)
Restructuring Reserve, Ending Balance	268
Other Costs | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Charges and adjustments	$ 100

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 8,150	$ 9,273
Compensation cost not yet recognized	$ 68,900
Unrecognized compensation cost period for recognition	2 years 7 months 6 days
Stock option exercises (in shares)	2,620	100
Restricted Stock Restricted Stock Units And Performance Based Restricted Stock Units[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in period fair value	$ 300	$ 1,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted	4 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted	7 years
2012 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (in shares)	16,700,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (in shares)	3,800,000
Unrecognized compensation cost for Employee Stock Purchase Plan	$ 700

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
	Jan. 03, 2020	Dec. 28, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	$ 8,150	$ 9,273
Cost of Revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	962	674
Research and Development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	2,907	2,822
Selling, General and Administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	$ 4,281	$ 5,777

Share-Based Compensation Share-

Share-Based Compensation Share-Based Compensation Plans - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Number of Shares
Beginning Blance Stock options outstanding (in shares)	376,000
Granted (in shares)	0
Exercised (in shares)	(2,620)	(100)
Forfeited, canceled or expired (in shares)	0
Ending Balance Stock options outstanding (in shares)	373,000
Weighted-Average Exercise Price per Share
Beginning Balance weighted-average exercise price per share (in usd per share)	$ 13.58
Granted (in dollars per share)	0
Exercised (in dollars per share)	16.55
Forfeited, canceled or expired (in dollars per share)	0
Ending Balance weighted-average exercise price per share (in usd per share)	$ 13.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term options outstanding	6 years 9 months 21 days
Aggregate intrinsic value stock options outstanding	$ 4,676
Options vested and expected to vest (in shares)	373,000
Options vested and expected to vest (in dollars per share)	$ 13.56
Weighted average remaining contractual term options vested and expected to vest	6 years 9 months 21 days
Aggregate intrinsic value of options vested and expected to vest	$ 4,676
Options exercisable (in shares)	89,000
Options exercisable (in dollars per share)	$ 9.62
Weighted-average remaining contractual term of options exercisable	2 years 3 months 7 days
Options exercisable intrinsic value	$ 1,458

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	3 Months Ended
	Jan. 03, 2020	Sep. 27, 2019
Number of RSAs, RSUs and PRSUs (in thousands)
Balance at beginning of period (in shares)	2,613
Granted (in shares)	1,145
Vested and released (in shares)	(10)
Forfeited, canceled or expired (in shares)	(165)
Balance at end of period (in shares)	3,583
Weighted- Average Grate Date Fair Value
Balance at beginning of period (in usd per share)	$ 21.81
Granted (in usd per share)	21.72
Vested and released (in usd per share)	32.20
Forfeited, canceled or expired (in usd per share)	23.84
Balance at end of period (in usd per share)	$ 21.66
Aggregate Intrinsic Value (in thousands)	$ 93,467	$ 56,649

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Sep. 27, 2019
Investments, Owned, Federal Income Tax Note [Line Items]
Effective Income Tax Rate Reconciliation, Percent	(5.10%)	(5.10%)
Income tax expense	$ 1,386,000	$ 1,125,000
Unrecognized tax benefit	300,000
Penalties and interest accrued	0		$ 0
Penalties and interest expense	$ 0	$ 0
Effective tax rate	21.00%
Deferred Tax Assets, Gross	$ 39,800,000

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Equity Method Investments	$ (3,749)	$ (4,556)
Consideration on sale of business	17,200
Unpaid amounts related to purchase of assets	$ 1,500	3,000
Capitalized construction costs for capital leases		1,100
Developer Funded [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capitalized construction costs for capital leases		$ 200

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Noncash or Part Noncash Acquisitions [Line Items]
Cash paid for interest	$ 7,624	$ 5,912
Cash paid for income taxes	$ 377	28
Capitalized construction costs for capital leases		1,100
Developer Funded [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Capitalized construction costs for capital leases		$ 200

Geographic and Significant Cu_3

Geographic and Significant Customer Information - Additional Information (Details) - segment	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Segment Reporting [Abstract]
Number of reportable operating segment	1
Revenue | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	60.00%	61.00%

Geographic and Significant Cu_4

Geographic and Significant Customer Information - Summary of Different Geographic Regions (Details) - USD ($) $ in Thousands	Jan. 03, 2020	Sep. 27, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets by Geographic Region	$ 129,979	$ 132,647
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets by Geographic Region	112,888	116,037
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets by Geographic Region	9,062	8,917
Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets by Geographic Region	$ 8,029	$ 7,693

Geographic and Significant Cu_5

Geographic and Significant Customer Information - Summary of Customer Concentrations as Percentage of Revenue and Accounts Receivable (Details) - Customer Concentration Risk [Member]	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Revenue
Revenue from External Customer [Line Items]
Concentration risk, percentage	60.00%	61.00%
Revenue | Customer A
Revenue from External Customer [Line Items]
Concentration risk, percentage	16.00%	15.00%
Accounts Receivable [Member] | Customer A
Revenue from External Customer [Line Items]
Concentration risk, percentage	25.00%	24.00%
Accounts Receivable [Member] | Customer B
Revenue from External Customer [Line Items]
Concentration risk, percentage	10.00%	10.00%