Balance Sheet Components - Change in deferred revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Contract with Customer, Liability [Roll Forward]
Deferred revenue, beginning of period	$ 83,470	$ 89,498
Recognition of revenue included in beginning of period deferred revenue	(11,520)	(23,721)
Revenue deferred, net of revenue recognized on contracts in the respective period	10,031	9,801
Deferred revenue, end of period	$ 81,981	$ 75,578