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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Income Tax Disclosure [Abstract]
U.S. federal income taxes at statutory rate	$ 32,954	$ (4,217)	$ (226)
U.S. state and local income taxes, net of federal benefit and state credits	(9,473)	(2,798)	(9,315)
Foreign income tax rate differential	1,430	(75)	129
Stock-based compensation	(47,496)	869	(2,399)
Federal research and development tax credits	(21,535)	(8,012)	(8,418)
Unrecognized federal tax benefits	4,041	815	(2,806)
Change in tax rate	(2,681)	0	1,161
Global intangible low taxed income, net of foreign tax credits	0	0	239
Base erosion and anti-abuse tax	0	(781)	781
Other	(565)	598	822
Change in valuation allowance	41,655	13,633	23,722
Provision for income taxes	$ (1,670)	$ 32	$ 3,690

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