Summary of Significant Accounting Policies - Schedule of intercompany foreign currency balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Product Information [Line Items]
Foreign currency remeasurement and transaction gain (losses)	$ 4,143	$ (4,035)	$ (941)
Other income (expense)
Product Information [Line Items]
Foreign currency remeasurement and transaction gain (losses)	$ 6,594	$ (8,622)	$ (1,245)