Sonos (SONO) 10-Q 8 Aug 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jun. 29, 2019	Jul. 27, 2019
Document Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 29, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	Sonos Inc
Entity Central Index Key	0001314727
Current Fiscal Year End Date	--09-28
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity common stock, shares outstanding (in shares)		106,324,760

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 29, 2019	Sep. 29, 2018
Current assets:
Cash and cash equivalents	$ 338,292	$ 220,930
Restricted cash	186	190
Accounts receivable, net of allowances	91,333	73,214
Inventories	121,225	193,193
Prepaids and other current assets	15,363	10,073
Total current assets	566,399	497,600
Property and equipment, net	72,856	85,371
Deferred tax assets	1,056	941
Other noncurrent assets	3,607	3,586
Total assets	643,918	587,498
Current liabilities:
Accounts payable	153,478	195,159
Accrued expenses	46,562	38,687
Accrued compensation	34,300	33,371
Short-term debt	11,667	6,667
Deferred revenue	13,349	11,615
Other current liabilities	16,146	10,858
Total current liabilities	275,502	296,357
Long-term debt	28,154	33,097
Deferred revenue	42,757	39,352
Other noncurrent liabilities	9,080	10,334
Total liabilities	355,493	379,140
Commitments and contingencies (Note 7)
Stockholders’ equity:
Common stock, $0.001 par value	107	101
Treasury stock	(11,904)	(11,072)
Additional paid-in capital	480,170	424,617
Accumulated deficit	(178,777)	(203,611)
Accumulated other comprehensive loss	(1,171)	(1,677)
Total stockholders’ equity	288,425	208,358
Total liabilities and stockholders’ equity	$ 643,918	$ 587,498

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 29, 2019	Sep. 29, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue	$ 260,119	$ 208,398	$ 966,663	$ 864,069
Cost of revenue	142,749	112,909	563,591	491,037
Gross profit	117,370	95,489	403,072	373,032
Operating expenses
Research and development	44,355	35,444	121,530	104,209
Sales and marketing	61,482	60,819	176,705	214,077
General and administrative	26,583	20,860	74,308	63,822
Total operating expenses	132,420	117,123	372,543	382,108
Operating income (loss)	(15,050)	(21,634)	30,529	(9,076)
Other income (expense), net
Interest income (expense), net	806	(1,116)	1,019	(3,367)
Other income (expense), net	1,068	(3,744)	(3,640)	(315)
Total other income (expense), net	1,874	(4,860)	(2,621)	(3,682)
Income (loss) before provision for income taxes	(13,176)	(26,494)	27,908	(12,758)
Provision for income taxes	833	494	3,074	1,126
Net income (loss)	(14,009)	(26,988)	24,834	(13,884)
Net income (loss) attributable to common stockholders:
Basic	(14,009)	(26,988)	24,834	(13,884)
Diluted	$ (14,009)	$ (26,988)	$ 24,834	$ (13,884)
Basic (in USD per share)	$ (0.13)	$ (0.45)	$ 0.24	$ (0.23)
Diluted (in USD per share)	$ (0.13)	$ (0.45)	$ 0.22	$ (0.23)
Weighted-average shares used in computing net loss per share attributable to common stockholders:
Basic (in shares)	105,522,313	60,074,763	102,667,316	59,484,761
Diluted (in shares)	105,522,313	60,074,763	112,542,998	59,484,761
Total comprehensive loss
Net income (loss)	$ (14,009)	$ (26,988)	$ 24,834	$ (13,884)
Change in foreign currency translation adjustment	(663)	162	506	523
Comprehensive income (loss)	$ (14,672)	$ (26,826)	$ 25,340	$ (13,361)

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Loss
Redeemable convertible preferred stock, beginning balance (in shares) at Sep. 30, 2017	32,482,590
Redeemable convertible preferred stock, beginning balance at Sep. 30, 2017	$ 90,341
Redeemable convertible preferred stock, ending balance (in shares) at Jun. 30, 2018	32,482,590
Redeemable convertible preferred stock, ending balance at Jun. 30, 2018	$ 90,341
Balance, beginning of period (in shares) at Sep. 30, 2017		59,339,336		(746,462)
Balance, beginning of period at Sep. 30, 2017	27	$ 59	$ 200,301	$ (10,161)	$ (188,007)	$ (2,165)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to equity incentive plans (in shares)		1,735,750
Issuance of common stock pursuant to equity incentive plans	5,748	$ 2	5,746
Purchase of treasury stock (in shares)				(60,578)
Purchase of treasury stock	(911)			$ (911)
Stock-based compensation expense	29,397		29,397
Net loss	(13,884)				(13,884)
Change in foreign currency translation adjustment	523
Balance, end of period (in shares) at Jun. 30, 2018		61,075,086		(807,040)
Balance, ending of period at Jun. 30, 2018	$ 20,900	$ 61	235,444	$ (11,072)	(201,891)	(1,642)
Redeemable convertible preferred stock, beginning balance (in shares) at Mar. 31, 2018	32,482,590
Redeemable convertible preferred stock, beginning balance at Mar. 31, 2018	$ 90,341
Redeemable convertible preferred stock, ending balance (in shares) at Jun. 30, 2018	32,482,590
Redeemable convertible preferred stock, ending balance at Jun. 30, 2018	$ 90,341
Balance, beginning of period (in shares) at Mar. 31, 2018		60,707,232		(799,174)
Balance, beginning of period at Mar. 31, 2018	36,121	$ 61	223,720	$ (10,953)	(174,903)	(1,804)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to equity incentive plans (in shares)		367,854
Issuance of common stock pursuant to equity incentive plans	1,391	$ 0	1,391
Purchase of treasury stock (in shares)				(7,866)
Purchase of treasury stock	(119)			$ (119)
Stock-based compensation expense	10,333		10,333
Net loss	(26,988)				(26,988)
Change in foreign currency translation adjustment	162					162
Balance, end of period (in shares) at Jun. 30, 2018		61,075,086		(807,040)
Balance, ending of period at Jun. 30, 2018	20,900	$ 61	235,444	$ (11,072)	(201,891)	(1,642)
Balance, beginning of period (in shares) at Sep. 29, 2018		100,868,250		(807,040)
Balance, beginning of period at Sep. 29, 2018	$ 208,358	$ 101	424,617	$ (11,072)	(203,611)	(1,677)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to equity incentive plans (in shares)	5,869,451	6,305,429		0
Issuance of common stock pursuant to equity incentive plans	$ 22,034	$ 6	22,028
Purchase of treasury stock (in shares)				(79,879)
Purchase of treasury stock	(832)			$ (832)
Stock-based compensation expense	33,525		33,525
Net loss	24,834				24,834
Change in foreign currency translation adjustment	506
Balance, end of period (in shares) at Jun. 29, 2019		107,173,679		(886,919)
Balance, ending of period at Jun. 29, 2019	288,425	$ 107	480,170	$ (11,904)	(178,777)	(1,171)
Balance, beginning of period (in shares) at Mar. 30, 2019		105,692,632		(861,354)
Balance, beginning of period at Mar. 30, 2019	286,869	$ 106	463,677	$ (11,638)	(164,768)	(508)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to equity incentive plans (in shares)		1,481,047
Issuance of common stock pursuant to equity incentive plans	3,086	$ 1	3,085
Purchase of treasury stock (in shares)				(25,565)
Purchase of treasury stock	(266)			$ (266)
Stock-based compensation expense	13,408		13,408
Net loss	(14,009)				(14,009)
Change in foreign currency translation adjustment	(663)					(663)
Balance, end of period (in shares) at Jun. 29, 2019		107,173,679		(886,919)
Balance, ending of period at Jun. 29, 2019	$ 288,425	$ 107	$ 480,170	$ (11,904)	$ (178,777)	$ (1,171)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Cash flows from operating activities
Net income (loss)	$ 24,834	$ (13,884)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation	27,403	28,647
Stock-based compensation expense	33,525	29,397
Other	1,962	639
Deferred income taxes	(129)	117
Foreign currency transaction loss	1,430	301
Changes in operating assets and liabilities:
Accounts receivable, net	(19,114)	(5,659)
Inventories, net	69,683	(79)
Other assets	(5,434)	(4,901)
Accounts payable and accrued expenses	(33,680)	(24,357)
Accrued compensation	1,091	(4,237)
Deferred revenue	5,279	10,342
Other liabilities	4,086	(534)
Net cash provided by operating activities	110,936	15,792
Cash flows from investing activities
Purchases of property and equipment	(14,092)	(25,927)
Net cash used in investing activities	(14,092)	(25,927)
Cash flows from financing activities
Proceeds from borrowings, net of borrowing costs	0	30,000
Repayments of borrowings	0	(30,000)
Payments for purchase of treasury stock	(832)	(911)
Proceeds from exercise of common stock options	22,034	5,748
Payments of offering costs	(585)	(2,154)
Net cash provided by financing activities	20,617	2,683
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(103)	1,289
Net increase (decrease) in cash, cash equivalents and restricted cash	117,358	(6,163)
Cash, cash equivalents and restricted cash
Beginning of period	221,120	130,788
End of period	338,478	124,625
Supplemental disclosure
Cash paid for interest	1,334	3,596
Cash paid for taxes, net of refunds	2,534	1,251
Supplemental disclosure of non-cash investing and financing activities
Purchases of property and equipment in accounts payable and accrued expenses	6,053	7,187
Deferred offering costs in accounts payable and accrued expenses	$ 0	$ 972

Business overview and basis of

Business overview and basis of presentation	9 Months Ended
	Jun. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business overview and basis of presentation	Business overview and basis of presentation Description of business Sonos, Inc. and its wholly owned subsidiaries (collectively, “Sonos,” the “Company,” “we,” “us” or “our”) designs, develops, manufactures and sells multi-room audio products. The Sonos sound system provides customers with an immersive listening experience created by the design of its speakers and components, a proprietary software platform and the ability to stream content from a variety of sources throughout the home over the customer’s wireless network. The Company’s products are sold through third-party physical retailers, including custom installers of home audio systems. The Company also sells through select e-commerce retailers and its website sonos.com. The Company’s products are distributed in over 50 countries through its wholly owned subsidiaries: Sonos Europe B.V., Beijing Sonos Technology Co., Ltd., Sonos Japan GK and Sonos Australia Pty Ltd., located in the Netherlands, China, Japan and Australia, respectively. Basis of presentation and preparation The accompanying condensed consolidated financial statements are unaudited. The condensed consolidated balance sheet as of June 29, 2019 has been derived from the audited financial statements of the Company. The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) for interim financial information, and in management’s opinion, includes all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position, its results of operations and cash flows for the interim periods presented. The results of operations for the nine months ended June 29, 2019 are not necessarily indicative of the results to be expected for the full fiscal year or any other period. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended September 29, 2018 (the “Annual Report”), filed with the Securities and Exchange Commission (“SEC”) on November 28, 2018. Certain prior period amounts have been reclassified to conform to the current period presentation. The Company has a 4-4-5 fiscal year ending on the Saturday nearest September 30 each year. The Company’s fiscal year is divided into four quarters of 13 weeks, each beginning on a Sunday and containing two 4-week periods followed by a 5-week period. An additional week is included in the fourth fiscal quarter approximately every five years to realign fiscal quarters with calendar quarters. This last occurred in the fourth quarter of the Company’s fiscal year ended October 3, 2015. The nine months ended June 29, 2019 and June 30, 2018 spanned 39 weeks each. As used in this Quarterly Report on Form 10-Q, “fiscal 2019” refers to the fiscal year ending September 28, 2019 and “fiscal 2018” refers to the fiscal year ended September 29, 2018. Initial public offering On August 6, 2018, the Company completed its initial public offering (the “IPO”) of its common stock, in which it sold 6,388,888 shares of its common stock, including 833,333 shares of its common stock pursuant to the underwriters’ over-allotment option, and selling stockholders sold 9,583,333 shares of the Company’s common stock, including 1,250,000 shares pursuant to the underwriters’ over-allotment option. The shares were sold at the IPO price of $15.00 per share for net proceeds of $90.6 million , after deducting underwriting discounts and commissions of $5.3 million . Additionally, offering costs incurred by the Company totaled approximately $4.6 million . Upon the closing of the IPO, all outstanding shares of the Company’s redeemable convertible preferred stock automatically converted into 32,482,590 shares of common stock on a one -for-one basis. Stock split On July 19, 2018, the Company effected a two -for-one stock split of all outstanding shares of the Company’s capital stock, including its common stock and its redeemable convertible preferred stock. All share and per share information presented in the condensed consolidated financial statements has been retroactively adjusted for all periods presented for the effects of the stock split. Use of estimates and judgments The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the amounts reported and disclosed in the condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, the Company evaluates its estimates and judgments compared to historical experience and expected trends.

Summary of significant accounti

Summary of significant accounting policies	9 Months Ended
	Jun. 29, 2019
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies There have been no changes in the Company’s significant accounting policies, recently adopted accounting pronouncements, or recent accounting pronouncements pending adoption from those disclosed in the Annual Report, except as noted below. Recently adopted accounting pronouncements In June 2018, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting , which aligns the accounting for share-based payment awards issued to nonemployees with the guidance applicable to grants to employees. Under this new standard, equity-classified share-based payment awards issued to nonemployees will be measured on the grant date, instead of the current requirement to remeasure the awards through the performance completion date. Further, compensation cost for awards with performance conditions will be recognized when it is probable the conditions will be achieved, rather than upon actual achievement of the conditions. In the second quarter of fiscal 2019, the Company early adopted the standard using the prospective approach. There was no cumulative effect entry needed to adjust the opening retained earnings balance upon adoption. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments , which reduces diversity in practice in how certain transactions are classified in the statement of cash flows. In the first quarter of fiscal 2019, the Company retrospectively adopted this standard to all periods presented in this Quarterly Report on Form 10-Q. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory . ASU 2016-16 removes the prohibition in Accounting Standards Codification (“ASC”) Topic 740, Income Taxes , against the immediate recognition of the current and deferred income tax effects of intra-entity transfers of assets other than inventory. ASU 2016-16 is intended to reduce the complexity of U.S. GAAP and diversity in practice related to the tax consequences of certain types of intra-entity asset transfers, particularly those involving intellectual property. In the first quarter of fiscal 2019, the Company adopted this standard on a modified retrospective basis. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash , which enhances and clarifies the classification and presentation of restricted cash in the statement of cash flows. In the first quarter of fiscal 2019, the Company adopted this standard retrospectively to all periods presented in this Quarterly Report on Form 10-Q. The Company now includes restricted cash and restricted cash equivalents with cash and cash equivalents when reconciling beginning and ending amounts shown on the statement of cash flows. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification , amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders’ equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders’ equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule became effective November 5, 2018. In the first quarter of fiscal 2019, the Company adopted this standard for all periods presented in this Quarterly Report on Form 10-Q, presenting the activity of the stockholders’ equity accounts in the accompanying consolidated statements of redeemable convertible preferred stock and stockholders’ equity for the periods presented. Recent accounting pronouncements pending adoption In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , and other subsequent amendments to amend historical lease accounting in order to increase transparency and comparability among entities. The standard requires lessees to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. This standard is effective for public entities for fiscal years beginning after December 15, 2018, and interim periods within those years, with early adoption permitted. The Company expects to adopt the new lease standard in the first quarter of fiscal 2020. In July 2018, the FASB issued ASU No. 2018-11, "Leases (Topic 842): Targeted improvements," which provides an alternative transition method that entities can elect when adopting this standard. Under this alternative transition method, a company is permitted to use its effective date as the date of initial application without restating comparative period financial statements. The Company currently anticipates to adopt Topic 842 utilizing this alternative transition method. In adopting the new guidance, the Company expects to elect the package of practical expedients which allows the Company not to reassess (1) whether any expired or existing contracts contain leases under the new definition of a lease; (2) the lease classification for any expired or existing leases; and (3) whether previously capitalized initial direct costs would qualify for capitalization under Topic 842. Upon adoption, the Company will recognize any qualifying right-of-use assets and lease liabilities on its condensed consolidated balance sheets, which will increase the Company’s total assets and total liabilities. The Company is currently evaluating the impact of adoption on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350- 40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract . The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud computing arrangement that is a service contract, with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard will be effective for the Company in the first quarter of fiscal 2021, with early adoption permitted. The Company is currently evaluating the timing of adoption and impact on the Company's consolidated financial statements. In November 2018, the FASB issued ASU No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606 . This standard resolves the diversity in practice concerning whether certain transactions between collaborative arrangement participants should be accounted for as revenue under Accounting Standards Codification 606, Revenue from Contracts with Customers (“Topic 606”). This standard specifies when a participant is a customer in a collaboration, adds unit of account guidance to align with Topic 606 and provides presentation guidance for collaborative arrangements. This guidance is effective for public entities for fiscal years beginning after December 15, 2019, and for interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the timing of the adoption and its impact on the Company’s consolidated financial statements.

Fair value measurements

Fair value measurements	9 Months Ended
	Jun. 29, 2019
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements The carrying values of the Company’s financial instruments, including accounts receivable and accounts payable, approximate their fair values due to the short period of time to maturity or repayment. The carrying values of the Company’s long-term debt approximate their fair values as of June 29, 2019 and September 29, 2018 as the debt carries a variable rate or market rates that approximate those currently available to the Company. The following table summarizes fair value measurements by level for the assets measured at fair value on a recurring basis as of June 29, 2019 and September 29, 2018 : June 29, 2019 (In thousands) Level 1 Level 2 Level 3 Total Assets: Money market funds (cash equivalents) $ 266,326 $ — $ — $ 266,326 September 29, 2018 (In thousands) Level 1 Level 2 Level 3 Total Assets: Money market funds (cash equivalents) $ 140,588 $ — $ — $ 140,588

Revenue and geographic informat

Revenue and geographic information	9 Months Ended
	Jun. 29, 2019
Revenue from Contract with Customer [Abstract]
Revenue and geographic information	Revenue and geographic information Disaggregation of revenue Revenue by geographical region includes the applicable service revenue attributable to each region and is based on ship-to address, as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) Americas $ 145,612 $ 122,982 $ 520,684 $ 447,705 Europe, Middle East and Africa (“EMEA”) 88,151 75,585 383,537 374,790 Asia Pacific (“APAC”) 26,356 9,831 62,442 41,574 Total revenue $ 260,119 $ 208,398 $ 966,663 $ 864,069 Revenue is attributed to individual countries based on ship-to address and includes the applicable service revenue attributable to each country. Revenue by significant countries is as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) United States $ 134,924 $ 113,558 $ 481,888 $ 409,701 Germany 20,636 18,512 96,775 95,720 United Kingdom 19,810 17,930 90,036 88,421 Other countries 84,749 58,398 297,964 270,227 Total revenue $ 260,119 $ 208,398 $ 966,663 $ 864,069 Revenue by product categories includes the applicable service revenue attributable to each product category. Revenue by major product category is as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) Wireless speakers $ 104,626 $ 93,867 $ 401,994 $ 453,185 Home theater speakers 89,660 66,732 388,902 283,952 Components 48,135 42,283 137,539 113,530 Other 17,698 5,516 38,228 13,402 Total revenue $ 260,119 $ 208,398 $ 966,663 $ 864,069

Balance sheet components

Balance sheet components	9 Months Ended
	Jun. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance sheet components	Balance sheet components Accounts receivable, net of allowances Accounts receivable, net of allowances, consist of the following: June 29, 2019 September 29, 2018 (In thousands) Accounts receivable $ 110,507 $ 85,840 Allowance for doubtful accounts (1,069 ) (872 ) Allowance for sales incentives (18,105 ) (11,754 ) Accounts receivable, net of allowances $ 91,333 $ 73,214 Inventories Inventories, net, consist of the following: June 29, 2019 September 29, 2018 (In thousands) Finished goods $ 104,078 $ 176,181 Component parts 17,147 17,012 Inventories $ 121,225 $ 193,193 The Company writes down inventory as a result of excess and obsolete inventories, or when it believes that the net realizable value of inventories is less than the carrying value. Accrued expenses Accrued expenses consisted of the following: June 29, 2019 September 29, 2018 (In thousands) Accrued advertising and marketing $ 17,707 $ 11,613 Accrued taxes 4,999 4,175 Accrued inventory 1,723 4,179 Accrued manufacturing, logistics and product development 9,348 8,290 Accrued general and administrative expenses 7,413 3,322 Other accrued payables 5,372 7,108 Total accrued expenses $ 46,562 $ 38,687 Deferred revenue Amounts invoiced in advance of revenue recognition are recorded as deferred revenue on the condensed consolidated balance sheets. Deferred revenue primarily relates to revenue allocated to unspecified software upgrades and platform services. The following table presents the changes in the Company’s deferred revenue for the nine months ended June 29, 2019 and June 30, 2018 : June 29, 2019 June 30, 2018 (In thousands) Deferred revenue, beginning of period $ 50,967 $ 45,567 Recognition of revenue included in beginning of period deferred revenue (8,827 ) (8,367 ) Revenue deferred, net of revenue recognized on contracts in the respective period 13,966 18,594 Deferred revenue, end of period $ 56,106 $ 55,794 The Company expects the following recognition of deferred revenue as of June 29, 2019 : For the fiscal years ending 2019 2020 2021 2022 2023 and Beyond Total (In thousands) Deferred revenue expected to be recognized $ 3,561 $ 12,934 $ 11,631 $ 9,785 $ 18,195 $ 56,106 Other current liabilities Other current liabilities consist of the following: June 29, September 29, (In thousands) Reserve for returns $ 10,390 $ 5,005 Product warranty liability 3,096 2,450 Other 2,660 3,403 Total other current liabilities $ 16,146 $ 10,858 The following table presents the changes in the Company’s warranty liability for the nine months ended June 29, 2019 and June 30, 2018 : June 29, 2019 June 30, 2018 (In thousands) Warranty liability, beginning of period $ 2,450 $ 2,437 Provision for warranties issued during the period 9,474 6,865 Settlements of warranty claims during the period (8,828 ) (6,785 ) Warranty liability, end of period $ 3,096 $ 2,517

Debt

Debt	9 Months Ended
	Jun. 29, 2019
Debt Disclosure [Abstract]
Debt	Debt The Company's debt obligations consist of the Secured Credit Facility with J.P. Morgan Chase Bank, N.A. (the “Credit Facility”) and the J.P. Morgan Chase Bank, N.A. Secured Term Loan (the "Term Loan"). The Company’s short- and long-term debt obligations as of June 29, 2019 and September 29, 2018 was as follows: June 29, 2019 September 29, 2018 Rate Balance Rate Balance (dollars in thousands) J.P. Morgan Chase Bank, N.A Secured Term Loan (1) 5.1 % $ 40,000 4.8 % $ 40,000 Unamortized debt issuance costs (2) (179 ) (236 ) Total indebtedness 39,821 39,764 Less short-term portion (11,667 ) (6,667 ) Long-term debt $ 28,154 $ 33,097 (1) Bears interest at a variable rate equal to an adjusted LIBOR plus 2.25% and is payable quarterly. Due in October 2021, with quarterly principal payments beginning in July 2019. (2) Debt issuance costs are recorded as a debt discount and recorded as interest expense over the term of the agreement. The Credit Facility allows the Company to borrow up to $80.0 million restricted to the value of the borrowing base which is based on the value of inventory and accounts receivable and is subject to monthly redetermination. The Credit Facility matures in October 2021 and may be drawn as Commercial Bank Floating Rate Loans (at the higher of prime rate or adjusted LIBOR plus 2.50% ) or Eurocurrency Loans (at LIBOR plus an applicable margin). As of both June 29, 2019 and September 29, 2018 , the Company did not have any outstanding borrowings and had $ 4.5 million in undrawn letters of credit that reduce the availability under the Credit Facility. Debt obligations under the Credit Facility and the Term Loan require the Company to maintain a consolidated fixed charge ratio of at least 1.0 , restrict distribution of dividends unless certain conditions are met, such as having a fixed charge ratio of at least 1.15 , and require financial statement reporting and delivery of borrowing base certificates. As of June 29, 2019 and September 29, 2018 , the Company was in compliance with all financial covenants. The Credit Facility and the Term Loan are collateralized by eligible inventory and accounts receivable of the Company, as well as the Company's intellectual property including patents and trademarks.

Commitments and contingencies

Commitments and contingencies	9 Months Ended
	Jun. 29, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Commitments and contingencies Legal proceedings From time to time, the Company is involved in legal proceedings in the ordinary course of business, including claims relating to employee relations, business practices and patent infringement. Litigation can be expensive and disruptive to normal business operations. Moreover, the results of complex legal proceedings are difficult to predict and the Company’s view of these matters may change in the future as the litigation and events related thereto unfold. The Company expenses legal fees as incurred. The Company records a provision for contingent losses when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. An unfavorable outcome to any legal matter, if material, could have an adverse effect on the Company’s operations or its financial position, liquidity or results of operations. On March 10, 2017, Implicit, LLC (“Implicit”) filed a patent infringement action in the United States District Court, District of Delaware against the Company. Implicit is asserting that the Company infringed on two patents in this case. The Company denies the allegations. There is no assurance of a favorable outcome and the Company’s business could be adversely affected as a result of a finding that the Company patents-in-suit are invalid and/or unenforceable. A range of loss, if any, associated with this matter is not probable or reasonably estimable as of June 29, 2019 and September 29, 2018 . The Company is involved in certain other litigation matters not listed above but does not consider the matters to be material either individually or in the aggregate at this time. The Company’s view of the matters not listed may change in the future as the litigation and events related thereto unfold.

Stock-based compensation

Stock-based compensation	9 Months Ended
	Jun. 29, 2019
Share-based Payment Arrangement [Abstract]
Stock-based compensation	Stock-based compensation In 2003, the Company’s board of directors (the “Board”) established the 2003 Stock Plan (as amended, the “2003 Plan”). In July 2018, the Board adopted the 2018 Equity Incentive Plan (the “2018 Plan”) and ceased granting awards under the 2003 Plan. The 2018 Plan became effective in connection with the IPO. Any remaining shares of common stock available for issuance under the 2003 Plan on the effective date of the 2018 Plan were added to the shares of common stock reserved for issuance under the 2018 Plan as of such date, and additional shares of common stock that would become available for issuance under the 2003 Plan in the future will instead become available for issuance under the 2018 Plan, as further discussed in the Annual Report. Stock options Pursuant to the 2018 Plan, the Company issues stock options to employees. The fair value of the stock options is based on the Company’s closing stock price on the trading day immediately prior to the date of grant. The option price, number of shares and grant date are determined at the discretion of the Board. For so long as the optionholder performs services for the Company, the options generally vest over 48 months , with cliff vesting after one year and generally vest on a monthly or quarterly basis thereafter, and are exercisable for a period not to exceed ten years from the date of grant. The summary of the Company’s stock option activity is as follows: Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Outstanding at September 29, 2018 48,504,182 $ 10.33 6.6 $ 276,959 Granted 1,714,328 Exercised (5,869,451 ) Forfeited (4,247,115 ) Outstanding at June 29, 2019 40,101,944 $ 11.10 6.4 $ 82,902 At June 29, 2019 Options exercisable 27,343,825 $ 9.62 5.4 $ 82,475 Options vested and expected to vest 38,174,480 $ 10.93 6.3 $ 82,792 As of June 29, 2019 and September 29, 2018 , the Company had $51.4 million and $71.5 million, respectively, of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted-average period of 2.2 and 2.6 years, respectively. Restricted stock units Pursuant to the 2018 Plan, the Company issues restricted stock units (“RSUs”) to employees. The fair value of RSUs is based on the Company's closing stock price on the trading day immediately preceding the date of grant. RSUs typically have an initial annual cliff vest and then vest quarterly over the service period, which is generally four years. The summary of the Company’s unvested RSU activity is as follows: Number of Units Weighted Average Grant Date Fair Value Aggregate Intrinsic Value (in thousands) Unvested at September 29, 2018 — $ — $ — Granted 7,369,802 Vested (435,978 ) Forfeited (225,899 ) Unvested at June 29, 2019 6,707,925 $ 11.31 $ 76,068 At June 29, 2019 Units expected to vest 5,118,685 $ 11.32 $ 58,046 As of June 29, 2019 , the Company had $ 55.1 million of unrecognized stock-based compensation expense related to their RSUs, which is expected to be recognized over a weighted-average period of 3.6 years. Stock-based compensation Total stock-based compensation expense by function category was as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) Cost of revenue $ 298 $ 49 $ 701 $ 156 Research and development 4,904 3,651 12,792 10,417 Sales and marketing 3,608 4,391 9,416 12,414 General and administrative 4,598 2,242 10,616 6,410 Total stock-based compensation expense $ 13,408 $ 10,333 $ 33,525 $ 29,397

Income taxes

Income taxes	9 Months Ended
	Jun. 29, 2019
Income Tax Disclosure [Abstract]
Income taxes	Income taxes The Company’s tax provision and the resulting effective tax rate for interim periods is determined based upon its estimated annual effective tax rate, adjusted for the effect of discrete items arising in that quarter. The impact of such inclusions could result in a higher or lower effective tax rate during a particular quarter, based upon the mix and timing of actual earnings or losses versus annual projections. In each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual tax rate changes, a cumulative adjustment is made in that quarter. The Company had an income tax expense of $0.8 million and income tax expense of $0.5 million for the three months ended June 29, 2019 and June 30, 2018 , respectively. The Company had income tax expense of $ 3.1 million and income tax expense of $ 1.1 million for the nine months ended June 29, 2019 and June 30, 2018 , respectively. For the three and nine months ended June 29, 2019 , we calculated our U.S. income tax provision using the discrete method as though the interim year to date period was an annual period. The Company believes that the application of the estimated annual effective tax rate (“AETR”) method generally required by ASC 740 is impractical for the U.S. tax provision given that normal deviations in the projected pre-tax net income (loss) in the U.S. could result in a disproportionate and unreliable effective tax rate under the AETR method. For the quarter-ended June 29, 2019 , the Company has maintained a full valuation allowance on its U.S. deferred tax assets due to its history of U.S. operating losses. It is possible that within the next 12 months there may be sufficient positive evidence to release a significant portion of the valuation allowance. Release of the U.S. valuation allowance would result in the establishment of certain deferred tax assets and a benefit to income tax expense for the period the release is recorded which could have a material impact on net earnings. The exact timing and amount of the valuation allowance release are subject to change based on the level of profitability achieved. Tax Cuts and Jobs Act On December 22, 2017, President Trump signed the Tax Cuts and Jobs Act (the “Tax Act”) into law, introducing significant changes to U.S. income tax law. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017 and the transition of U.S. international taxation from a worldwide tax system to a territorial system. The Company is subject to certain of the provisions of the Tax Act during the year ending September 28, 2019. These provisions include a new tax on global intangible low-taxed income (“GILTI”), a deduction for foreign derived intangible income (“FDII”) and a minimum tax on certain transactions deemed to erode the U.S. tax base (“BEAT”). The Company has elected to account for GILTI as a period cost. In fiscal 2019, the Company does not believe that its effective tax rate will be materially impacted by GILTI or FDII, but the Company may be subject to BEAT. The total BEAT provision for the year is subject to change based on the Company’s results of operations and new Internal Revenue Service guidance issued during the year. On December 22, 2017, the SEC issued Staff Accounting Bulletin No. 118, which allows the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. During the three months ended December 29, 2018, the Company completed the accounting for the elements of the Tax Act. The Company had previously not recorded a provision related to the Tax Act and has determined further adjustment was not required.

Net income (loss) per share att

Net income (loss) per share attributable to common stockholders	9 Months Ended
	Jun. 29, 2019
Earnings Per Share [Abstract]
Net income (loss) per share attributable to common stockholders	Net income (loss) per share attributable to common stockholders Basic and diluted net income (loss) per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. The Company considers its redeemable convertible preferred stock to be participating securities as the holders of redeemable convertible preferred stock were entitled to receive noncumulative dividends in the event that a dividend was paid on common stock. Upon the closing of the IPO, all outstanding shares of the Company’s redeemable convertible preferred stock automatically converted into 32,482,590 shares of common stock on a one -for-one basis. Basic net income (loss) attributable to common stockholders per share is calculated by dividing net income (loss) attributable to common stockholders by the weighted-average number of shares of common stock outstanding less shares subject to repurchase. Diluted net income (loss) per share attributable to common stockholders adjusts the basic net income (loss) per share attributable to common stockholders and the weighted-average number of shares of common stock outstanding for the potentially dilutive impact of stock options and RSUs, using the treasury stock method, and convertible preferred stock using the as-if-converted method. The following table sets forth the computation of the Company’s basic and diluted net income (loss) per share attributable to common stockholders: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands, except share and per share data) Numerator: Net income (loss) attributable to common stockholders - basic and diluted $ (14,009 ) $ (26,988 ) $ 24,834 $ (13,884 ) Denominator: Weighted-average shares of common stock—basic 105,522,313 60,074,763 102,667,316 59,484,761 Effect of potentially dilutive stock options — — 9,115,070 — Effect of RSUs — — 760,612 — Weighted-average shares of common stock—diluted 105,522,313 60,074,763 112,542,998 59,484,761 Net income (loss) per share attributable to common stockholders: Net income (loss) per share attributable to common stockholders - basic $ (0.13 ) $ (0.45 ) $ 0.24 $ (0.23 ) Net income (loss) per share attributable to common stockholders - diluted $ (0.13 ) $ (0.45 ) $ 0.22 $ (0.23 ) The following potentially dilutive shares were excluded from the computation of diluted net income (loss) per share attributable to common stockholders because including them would have been antidilutive: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 Convertible preferred stock — 32,482,590 — 32,482,590 Stock options to purchase common stock 40,916,245 48,370,248 34,408,923 48,370,248 Restricted stock units 6,394,726 — 2,532,886 — Shares subject to repurchase — 53,892 — 53,892 Total 47,310,971 80,906,730 36,941,809 80,906,730

Defined contribution plans

Defined contribution plans	9 Months Ended
	Jun. 29, 2019
Retirement Benefits [Abstract]
Defined contribution plans	Defined contribution plans The Company has a defined contribution 401(k) plan (the "401(k) Plan") for the Company’s U.S.-based employees, as well as defined contribution plans for employees in Germany, France and Netherlands. In the second quarter of fiscal 2019, the Company began making contributions towards the 401(k) Plan, as well as towards the defined contribution plans in Germany, France and Netherlands.

Business overview and basis o_2

Business overview and basis of presentation (Policies)	9 Months Ended
	Jun. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of presentation and preparation	Basis of presentation and preparation The accompanying condensed consolidated financial statements are unaudited. The condensed consolidated balance sheet as of June 29, 2019 has been derived from the audited financial statements of the Company. The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) for interim financial information, and in management’s opinion, includes all adjustments, consisting of only normal recurring adjustments, necessary for the fair statement of the Company’s financial position, its results of operations and cash flows for the interim periods presented. The results of operations for the nine months ended June 29, 2019 are not necessarily indicative of the results to be expected for the full fiscal year or any other period. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the fiscal year ended September 29, 2018 (the “Annual Report”), filed with the Securities and Exchange Commission (“SEC”) on November 28, 2018. Certain prior period amounts have been reclassified to conform to the current period presentation. The Company has a 4-4-5 fiscal year ending on the Saturday nearest September 30 each year. The Company’s fiscal year is divided into four quarters of 13 weeks, each beginning on a Sunday and containing two 4-week periods followed by a 5-week period. An additional week is included in the fourth fiscal quarter approximately every five years to realign fiscal quarters with calendar quarters. This last occurred in the fourth quarter of the Company’s fiscal year ended October 3, 2015. The nine months ended June 29, 2019 and June 30, 2018 spanned 39 weeks each. As used in this Quarterly Report on Form 10-Q, “fiscal 2019” refers to the fiscal year ending September 28, 2019 and “fiscal 2018” refers to the fiscal year ended September 29, 2018.
Use of estimates and judgment	Use of estimates and judgments The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the amounts reported and disclosed in the condensed consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, the Company evaluates its estimates and judgments compared to historical experience and expected trends.
Recently adopted accounting pronouncements and recent accounting pronouncements pending adoption	Recently adopted accounting pronouncements In June 2018, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting , which aligns the accounting for share-based payment awards issued to nonemployees with the guidance applicable to grants to employees. Under this new standard, equity-classified share-based payment awards issued to nonemployees will be measured on the grant date, instead of the current requirement to remeasure the awards through the performance completion date. Further, compensation cost for awards with performance conditions will be recognized when it is probable the conditions will be achieved, rather than upon actual achievement of the conditions. In the second quarter of fiscal 2019, the Company early adopted the standard using the prospective approach. There was no cumulative effect entry needed to adjust the opening retained earnings balance upon adoption. The adoption of this guidance did not have a material impact on the Company's consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments , which reduces diversity in practice in how certain transactions are classified in the statement of cash flows. In the first quarter of fiscal 2019, the Company retrospectively adopted this standard to all periods presented in this Quarterly Report on Form 10-Q. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory . ASU 2016-16 removes the prohibition in Accounting Standards Codification (“ASC”) Topic 740, Income Taxes , against the immediate recognition of the current and deferred income tax effects of intra-entity transfers of assets other than inventory. ASU 2016-16 is intended to reduce the complexity of U.S. GAAP and diversity in practice related to the tax consequences of certain types of intra-entity asset transfers, particularly those involving intellectual property. In the first quarter of fiscal 2019, the Company adopted this standard on a modified retrospective basis. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash , which enhances and clarifies the classification and presentation of restricted cash in the statement of cash flows. In the first quarter of fiscal 2019, the Company adopted this standard retrospectively to all periods presented in this Quarterly Report on Form 10-Q. The Company now includes restricted cash and restricted cash equivalents with cash and cash equivalents when reconciling beginning and ending amounts shown on the statement of cash flows. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification , amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders’ equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders’ equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule became effective November 5, 2018. In the first quarter of fiscal 2019, the Company adopted this standard for all periods presented in this Quarterly Report on Form 10-Q, presenting the activity of the stockholders’ equity accounts in the accompanying consolidated statements of redeemable convertible preferred stock and stockholders’ equity for the periods presented. Recent accounting pronouncements pending adoption In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , and other subsequent amendments to amend historical lease accounting in order to increase transparency and comparability among entities. The standard requires lessees to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. This standard is effective for public entities for fiscal years beginning after December 15, 2018, and interim periods within those years, with early adoption permitted. The Company expects to adopt the new lease standard in the first quarter of fiscal 2020. In July 2018, the FASB issued ASU No. 2018-11, "Leases (Topic 842): Targeted improvements," which provides an alternative transition method that entities can elect when adopting this standard. Under this alternative transition method, a company is permitted to use its effective date as the date of initial application without restating comparative period financial statements. The Company currently anticipates to adopt Topic 842 utilizing this alternative transition method. In adopting the new guidance, the Company expects to elect the package of practical expedients which allows the Company not to reassess (1) whether any expired or existing contracts contain leases under the new definition of a lease; (2) the lease classification for any expired or existing leases; and (3) whether previously capitalized initial direct costs would qualify for capitalization under Topic 842. Upon adoption, the Company will recognize any qualifying right-of-use assets and lease liabilities on its condensed consolidated balance sheets, which will increase the Company’s total assets and total liabilities. The Company is currently evaluating the impact of adoption on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350- 40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract . The new guidance aligns the requirements for capitalizing implementation costs incurred in a cloud computing arrangement that is a service contract, with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard will be effective for the Company in the first quarter of fiscal 2021, with early adoption permitted. The Company is currently evaluating the timing of adoption and impact on the Company's consolidated financial statements. In November 2018, the FASB issued ASU No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606 . This standard resolves the diversity in practice concerning whether certain transactions between collaborative arrangement participants should be accounted for as revenue under Accounting Standards Codification 606, Revenue from Contracts with Customers (“Topic 606”). This standard specifies when a participant is a customer in a collaboration, adds unit of account guidance to align with Topic 606 and provides presentation guidance for collaborative arrangements. This guidance is effective for public entities for fiscal years beginning after December 15, 2019, and for interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the timing of the adoption and its impact on the Company’s consolidated financial statements.

Fair value measurements (Tables

Fair value measurements (Tables)	9 Months Ended
	Jun. 29, 2019
Fair Value Disclosures [Abstract]
Summary of fair value measurements by level for the assets measured on a recurring basis	The following table summarizes fair value measurements by level for the assets measured at fair value on a recurring basis as of June 29, 2019 and September 29, 2018 : June 29, 2019 (In thousands) Level 1 Level 2 Level 3 Total Assets: Money market funds (cash equivalents) $ 266,326 $ — $ — $ 266,326 September 29, 2018 (In thousands) Level 1 Level 2 Level 3 Total Assets: Money market funds (cash equivalents) $ 140,588 $ — $ — $ 140,588

Revenue and geographic inform_2

Revenue and geographic information (Tables)	9 Months Ended
	Jun. 29, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	Revenue by geographical region includes the applicable service revenue attributable to each region and is based on ship-to address, as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) Americas $ 145,612 $ 122,982 $ 520,684 $ 447,705 Europe, Middle East and Africa (“EMEA”) 88,151 75,585 383,537 374,790 Asia Pacific (“APAC”) 26,356 9,831 62,442 41,574 Total revenue $ 260,119 $ 208,398 $ 966,663 $ 864,069 Revenue is attributed to individual countries based on ship-to address and includes the applicable service revenue attributable to each country. Revenue by significant countries is as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) United States $ 134,924 $ 113,558 $ 481,888 $ 409,701 Germany 20,636 18,512 96,775 95,720 United Kingdom 19,810 17,930 90,036 88,421 Other countries 84,749 58,398 297,964 270,227 Total revenue $ 260,119 $ 208,398 $ 966,663 $ 864,069 Revenue by product categories includes the applicable service revenue attributable to each product category. Revenue by major product category is as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) Wireless speakers $ 104,626 $ 93,867 $ 401,994 $ 453,185 Home theater speakers 89,660 66,732 388,902 283,952 Components 48,135 42,283 137,539 113,530 Other 17,698 5,516 38,228 13,402 Total revenue $ 260,119 $ 208,398 $ 966,663 $ 864,069

Balance sheet components (Table

Balance sheet components (Tables)	9 Months Ended
	Jun. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of accounts receivable	Accounts receivable, net of allowances, consist of the following: June 29, 2019 September 29, 2018 (In thousands) Accounts receivable $ 110,507 $ 85,840 Allowance for doubtful accounts (1,069 ) (872 ) Allowance for sales incentives (18,105 ) (11,754 ) Accounts receivable, net of allowances $ 91,333 $ 73,214
Schedule of inventories, net	Inventories, net, consist of the following: June 29, 2019 September 29, 2018 (In thousands) Finished goods $ 104,078 $ 176,181 Component parts 17,147 17,012 Inventories $ 121,225 $ 193,193
Schedule of accrued expenses	Accrued expenses consisted of the following: June 29, 2019 September 29, 2018 (In thousands) Accrued advertising and marketing $ 17,707 $ 11,613 Accrued taxes 4,999 4,175 Accrued inventory 1,723 4,179 Accrued manufacturing, logistics and product development 9,348 8,290 Accrued general and administrative expenses 7,413 3,322 Other accrued payables 5,372 7,108 Total accrued expenses $ 46,562 $ 38,687
Changes in deferred balances and expected revenue recognition	The following table presents the changes in the Company’s deferred revenue for the nine months ended June 29, 2019 and June 30, 2018 : June 29, 2019 June 30, 2018 (In thousands) Deferred revenue, beginning of period $ 50,967 $ 45,567 Recognition of revenue included in beginning of period deferred revenue (8,827 ) (8,367 ) Revenue deferred, net of revenue recognized on contracts in the respective period 13,966 18,594 Deferred revenue, end of period $ 56,106 $ 55,794
Remaining performance obligation	The Company expects the following recognition of deferred revenue as of June 29, 2019 : For the fiscal years ending 2019 2020 2021 2022 2023 and Beyond Total (In thousands) Deferred revenue expected to be recognized $ 3,561 $ 12,934 $ 11,631 $ 9,785 $ 18,195 $ 56,106
Schedule of other current liabilities	Other current liabilities consist of the following: June 29, September 29, (In thousands) Reserve for returns $ 10,390 $ 5,005 Product warranty liability 3,096 2,450 Other 2,660 3,403 Total other current liabilities $ 16,146 $ 10,858
Schedule of product warranty liability	The following table presents the changes in the Company’s warranty liability for the nine months ended June 29, 2019 and June 30, 2018 : June 29, 2019 June 30, 2018 (In thousands) Warranty liability, beginning of period $ 2,450 $ 2,437 Provision for warranties issued during the period 9,474 6,865 Settlements of warranty claims during the period (8,828 ) (6,785 ) Warranty liability, end of period $ 3,096 $ 2,517

Debt (Tables)

Debt (Tables)	9 Months Ended
	Jun. 29, 2019
Debt Disclosure [Abstract]
Schedule of short and long term debt	The Company’s short- and long-term debt obligations as of June 29, 2019 and September 29, 2018 was as follows: June 29, 2019 September 29, 2018 Rate Balance Rate Balance (dollars in thousands) J.P. Morgan Chase Bank, N.A Secured Term Loan (1) 5.1 % $ 40,000 4.8 % $ 40,000 Unamortized debt issuance costs (2) (179 ) (236 ) Total indebtedness 39,821 39,764 Less short-term portion (11,667 ) (6,667 ) Long-term debt $ 28,154 $ 33,097 (1) Bears interest at a variable rate equal to an adjusted LIBOR plus 2.25% and is payable quarterly. Due in October 2021, with quarterly principal payments beginning in July 2019. (2) Debt issuance costs are recorded as a debt discount and recorded as interest expense over the term of the agreement.

Stock-based compensation (Table

Stock-based compensation (Tables)	9 Months Ended
	Jun. 29, 2019
Share-based Payment Arrangement [Abstract]
Schedule of stock option activity	The summary of the Company’s stock option activity is as follows: Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Outstanding at September 29, 2018 48,504,182 $ 10.33 6.6 $ 276,959 Granted 1,714,328 Exercised (5,869,451 ) Forfeited (4,247,115 ) Outstanding at June 29, 2019 40,101,944 $ 11.10 6.4 $ 82,902 At June 29, 2019 Options exercisable 27,343,825 $ 9.62 5.4 $ 82,475 Options vested and expected to vest 38,174,480 $ 10.93 6.3 $ 82,792
Schedule of restricted stock unit activity	The summary of the Company’s unvested RSU activity is as follows: Number of Units Weighted Average Grant Date Fair Value Aggregate Intrinsic Value (in thousands) Unvested at September 29, 2018 — $ — $ — Granted 7,369,802 Vested (435,978 ) Forfeited (225,899 ) Unvested at June 29, 2019 6,707,925 $ 11.31 $ 76,068 At June 29, 2019 Units expected to vest 5,118,685 $ 11.32 $ 58,046
Schedule of stock-based compensation expense	Total stock-based compensation expense by function category was as follows: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands) Cost of revenue $ 298 $ 49 $ 701 $ 156 Research and development 4,904 3,651 12,792 10,417 Sales and marketing 3,608 4,391 9,416 12,414 General and administrative 4,598 2,242 10,616 6,410 Total stock-based compensation expense $ 13,408 $ 10,333 $ 33,525 $ 29,397

Net income (loss) per share a_2

Net income (loss) per share attributable to common stockholders (Tables)	9 Months Ended
	Jun. 29, 2019
Earnings Per Share [Abstract]
Schedule of earnings per share	The following table sets forth the computation of the Company’s basic and diluted net income (loss) per share attributable to common stockholders: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 (In thousands, except share and per share data) Numerator: Net income (loss) attributable to common stockholders - basic and diluted $ (14,009 ) $ (26,988 ) $ 24,834 $ (13,884 ) Denominator: Weighted-average shares of common stock—basic 105,522,313 60,074,763 102,667,316 59,484,761 Effect of potentially dilutive stock options — — 9,115,070 — Effect of RSUs — — 760,612 — Weighted-average shares of common stock—diluted 105,522,313 60,074,763 112,542,998 59,484,761 Net income (loss) per share attributable to common stockholders: Net income (loss) per share attributable to common stockholders - basic $ (0.13 ) $ (0.45 ) $ 0.24 $ (0.23 ) Net income (loss) per share attributable to common stockholders - diluted $ (0.13 ) $ (0.45 ) $ 0.22 $ (0.23 )
Schedule of antidilutive securities	The following potentially dilutive shares were excluded from the computation of diluted net income (loss) per share attributable to common stockholders because including them would have been antidilutive: Three Months Ended Nine Months Ended June 29, 2019 June 30, 2018 June 29, 2019 June 30, 2018 Convertible preferred stock — 32,482,590 — 32,482,590 Stock options to purchase common stock 40,916,245 48,370,248 34,408,923 48,370,248 Restricted stock units 6,394,726 — 2,532,886 — Shares subject to repurchase — 53,892 — 53,892 Total 47,310,971 80,906,730 36,941,809 80,906,730

Business overview and basis o_3

Business overview and basis of presentation (Details) $ / shares in Units, $ in Thousands	Aug. 06, 2018USD ($)$ / sharesshares	Jul. 19, 2018	Jun. 29, 2019USD ($)country	Jun. 30, 2018USD ($)
Class of Stock [Line Items]
Number of countries where products are distributed | country			50
Underwriting discounts and commissions | $			$ 585	$ 2,154
Common shares issued in conversion of outstanding shares of redeemable convertible preferred stock (shares)	32,482,590
Number of shares of common stock issued for each share of redeemable convertible preferred stock	1
Stock split, conversion ratio		2
IPO
Class of Stock [Line Items]
Shares sold in IPO (shares)	6,388,888
Public offering price (in USD per share) | $ / shares	$ 15
Net proceeds from IPO | $	$ 90,600
Underwriting discounts and commissions | $	5,300
Offering costs | $	$ 4,600
Over-Allotment Option
Class of Stock [Line Items]
Shares sold in IPO (shares)	833,333
Initial Public Offering - Shares From Existing Shareholders
Class of Stock [Line Items]
Shares sold in IPO (shares)	9,583,333
Over-Allotment Option - Shares From Existing Shareholders
Class of Stock [Line Items]
Shares sold in IPO (shares)	1,250,000

Fair value measurements (Detail

Fair value measurements (Details) - Money Market Funds - USD ($) $ in Thousands	Jun. 29, 2019	Sep. 29, 2018
Assets:
Money market funds (cash equivalents)	$ 266,326	$ 140,588
Level 1
Assets:
Money market funds (cash equivalents)	266,326	140,588
Level 2
Assets:
Money market funds (cash equivalents)	0	0
Level 3
Assets:
Money market funds (cash equivalents)	$ 0	$ 0

Revenue and geographic inform_3

Revenue and geographic information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 260,119	$ 208,398	$ 966,663	$ 864,069
Wireless speakers
Disaggregation of Revenue [Line Items]
Revenue	104,626	93,867	401,994	453,185
Home theater speakers
Disaggregation of Revenue [Line Items]
Revenue	89,660	66,732	388,902	283,952
Components
Disaggregation of Revenue [Line Items]
Revenue	48,135	42,283	137,539	113,530
Other
Disaggregation of Revenue [Line Items]
Revenue	17,698	5,516	38,228	13,402
Americas
Disaggregation of Revenue [Line Items]
Revenue	145,612	122,982	520,684	447,705
Europe, Middle East and Africa (“EMEA”)
Disaggregation of Revenue [Line Items]
Revenue	88,151	75,585	383,537	374,790
Asia Pacific (“APAC”)
Disaggregation of Revenue [Line Items]
Revenue	26,356	9,831	62,442	41,574
United States
Disaggregation of Revenue [Line Items]
Revenue	134,924	113,558	481,888	409,701
Germany
Disaggregation of Revenue [Line Items]
Revenue	20,636	18,512	96,775	95,720
United Kingdom
Disaggregation of Revenue [Line Items]
Revenue	19,810	17,930	90,036	88,421
Other countries
Disaggregation of Revenue [Line Items]
Revenue	$ 84,749	$ 58,398	$ 297,964	$ 270,227

Balance sheet components - Acco

Balance sheet components - Accounts receivable, net of allowances (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable	$ 110,507	$ 85,840
Allowance for doubtful accounts	(1,069)	(872)
Allowance for sales incentives	(18,105)	(11,754)
Accounts receivable, net of allowances	$ 91,333	$ 73,214

Balance sheet components - Inve

Balance sheet components - Inventories, net (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Finished goods	$ 104,078	$ 176,181
Component parts	17,147	17,012
Inventories	$ 121,225	$ 193,193

Balance sheet components - Accr

Balance sheet components - Accrued expenses (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued advertising and marketing	$ 17,707	$ 11,613
Accrued taxes	4,999	4,175
Accrued inventory	1,723	4,179
Accrued manufacturing, logistics and product development	9,348	8,290
Accrued general and administrative expenses	7,413	3,322
Other accrued payables	5,372	7,108
Total accrued expenses	$ 46,562	$ 38,687

Balance sheet components - Chan

Balance sheet components - Change in deferred revenue (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Contract with Customer, Liability [Roll Forward]
Deferred revenue, beginning of period	$ 50,967	$ 45,567
Recognition of revenue included in beginning of period deferred revenue	(8,827)	(8,367)
Revenue deferred, net of revenue recognized on contracts in the respective period	13,966	18,594
Deferred revenue, end of period	$ 56,106	$ 55,794

Balance sheet components - Expe

Balance sheet components - Expected revenue recognition (Details) $ in Thousands	Jun. 29, 2019USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 56,106
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-06-30
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 3,561
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-09-29
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 12,934
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-09-27
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 11,631
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-03
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 9,785
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-02
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Deferred revenue expected to be recognized	$ 18,195
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied in

Balance sheet components - Othe

Balance sheet components - Other current liabilities (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Sep. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reserve for returns	$ 10,390	$ 5,005
Product warranty liability	3,096	2,450
Other	2,660	3,403
Total other current liabilities	$ 16,146	$ 10,858

Balance sheet components - Prod

Balance sheet components - Product Warranties (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Warranty liability, beginning of period	$ 2,450	$ 2,437
Provision for warranties issued during the period	9,474	6,865
Settlements of warranty claims during the period	(8,828)	(6,785)
Warranty liability, end of period	$ 3,096	$ 2,517

Debt - Schedule of debt (Detail

Debt - Schedule of debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2019	Sep. 29, 2018
Debt Disclosure [Abstract]
Debt, interest rate	5.10%	4.80%
Debt	$ 40,000	$ 40,000
Unamortized debt issuance costs	(179)	(236)
Total indebtedness	39,821	39,764
Less short-term portion	(11,667)	(6,667)
Long-term debt	$ 28,154	$ 33,097
LIBOR
Debt Instrument [Line Items]
Interest rate, spread on variable rate	2.25%

Debt - Additional Information (

Debt - Additional Information (Details)	9 Months Ended
	Jun. 29, 2019USD ($)	Sep. 29, 2018USD ($)
Debt Instrument [Line Items]
Fixed charge ratio, covenant one	1
Fixed charge ratio, covenant two	1.15
Outstanding debt	$ 39,821,000	$ 39,764,000
Letter of Credit
Debt Instrument [Line Items]
Unused borrowing capacity		$ 4,500,000
Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	80,000,000
Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Unused borrowing capacity	$ 4,500,000
LIBOR
Debt Instrument [Line Items]
Interest rate, spread on variable rate	2.25%
LIBOR | Credit Facility
Debt Instrument [Line Items]
Interest rate, spread on variable rate	2.50%

Commitments and contingencies (

Commitments and contingencies (Details)	Mar. 10, 2017patent
Implicit, LLC
Long-term Purchase Commitment [Line Items]
Loss contingency, patents allegedly infringed upon, number	2

Stock-based compensation - Addi

Stock-based compensation - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 29, 2019	Sep. 29, 2018
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	48 months
Unrecognized stock-based compensation expense	$ 51.4	$ 71.5
Unrecognized stock-based compensation expense, period of recognition	2 years 2 months 12 days	2 years 7 months 6 days
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 55.1
Unrecognized stock-based compensation expense, period of recognition	3 years 7 months 6 days
2003 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable period	10 years

Stock-based compensation - Stoc

Stock-based compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 29, 2019USD ($)$ / sharesshares	Sep. 29, 2018USD ($)$ / sharesshares
Number of Options
Beginning balance (in shares) | shares	48,504,182
Granted (in shares) | shares	1,714,328
Exercised (in shares) | shares	(5,869,451)
Forfeited (in shares) | shares	(4,247,115)
Ending balance (in shares) | shares	40,101,944	48,504,182
Options exercisable (in shares) | shares	27,343,825
Options vested and expected to vest (in shares) | shares	38,174,480
Weighted Average Exercise Price
Beginning balance (in USD per share) | $ / shares	$ 10.33
Granted (in USD per share) | $ / shares
Exercised (in USD per share) | $ / shares
Forfeited (in USD per share) | $ / shares
Ending balance (in USD per share) | $ / shares	11.10	$ 10.33
Option exercisable - Weighted Average Exercise Price (in USD per share) | $ / shares	9.62
Options vested and expected to vest - Weighted Average Exercise Price (in USD per share) | $ / shares	$ 10.93
Additional Information
Weighted Average Remaining Contractual Term	6 years 4 months 24 days	6 years 7 months 6 days
Option exercisable - Weighted Average Remaining Contractual Term	5 years 4 months 24 days
Options vested and expected to vest - Weighted Average Remaining Contractual Term	6 years 3 months 18 days
Aggregate Intrinsic Value | $	$ 82,902	$ 276,959
Options exercisable - Weighted Average Intrinsic Value | $	82,475
Options vested and expected to vest - Weighted Average Intrinsic Value | $	$ 82,792

Stock-based compensation - Rest

Stock-based compensation - Restricted Stock Unit Activity (Details) - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Jun. 29, 2019	Sep. 29, 2018
Number of Units
Outstanding, beginning balance (in shares)	0
Forfeited (in shares)	7,369,802
Exercised (in shares)	(435,978)
Granted (in shares)	(225,899)
Outstanding, ending balance (in shares)	6,707,925
Weighted Average Grant Date Fair Value
Outstanding, beginning balance (in usd per share)	$ 0
Outstanding, ending balance (in usd per share)	$ 11.31
Additional Information
Aggregate Intrinsic Value	$ 76,068	$ 0
Options vested and expected to vest (in shares)	5,118,685
Options vested and expected to vest - Weighted Average Exercise Price (in USD per share)	$ 11.32
Options vested and expected to vest - Weighted Average Intrinsic Value	$ 58,046

Stock-based compensation - St_2

Stock-based compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 13,408	$ 10,333	$ 33,525	$ 29,397
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	298	49	701	156
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	4,904	3,651	12,792	10,417
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	3,608	4,391	9,416	12,414
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 4,598	$ 2,242	$ 10,616	$ 6,410

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 833	$ 494	$ 3,074	$ 1,126

Net income (loss) per share a_3

Net income (loss) per share attributable to common stockholders - Computation of Basic and Diluted Earnings per Share (Details) $ / shares in Units, $ in Thousands	Aug. 06, 2018shares	Jun. 29, 2019USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares	Jun. 29, 2019USD ($)$ / sharesshares	Jun. 30, 2018USD ($)$ / sharesshares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares issued in conversion of outstanding shares of redeemable convertible preferred stock (shares)	32,482,590
Number of shares of common stock issued for each share of redeemable convertible preferred stock	1
Numerator:
Net income (loss) | $		$ (14,009)	$ (26,988)	$ 24,834	$ (13,884)
Denominator:
Weighted-average shares of common stock - basic (in shares)		105,522,313	60,074,763	102,667,316	59,484,761
Weighted-average shares of common stock - diluted (in shares)		105,522,313	60,074,763	112,542,998	59,484,761
Net income (loss) attributable to common stockholders:
Net income (loss) per share attributable to common stockholders - basic (in USD per share) | $ / shares		$ (0.13)	$ (0.45)	$ 0.24	$ (0.23)
Net income (loss) per share attributable to common stockholders - diluted (in USD per share) | $ / shares		$ (0.13)	$ (0.45)	$ 0.22	$ (0.23)
Stock Options
Denominator:
Effect of potentially dilutive stock options and RSUs (in shares)		0	0	9,115,070	0
Restricted Stock Units
Denominator:
Effect of potentially dilutive stock options and RSUs (in shares)		0	0	760,612	0

Net income (loss) per share a_4

Net income (loss) per share attributable to common stockholders - Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	47,310,971	80,906,730	36,941,809	80,906,730
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	0	32,482,590	0	32,482,590
Stock options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	40,916,245	48,370,248	34,408,923	48,370,248
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	6,394,726	0	2,532,886	0
Shares subject to repurchase
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	0	53,892	0	53,892