Marketable Securities Schedule of Available for sale securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2021	Oct. 02, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Gain	$ 0
US Treasury and Government [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Gain		$ 300
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Gain		$ 200