Marketable Securities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 02, 2021	Oct. 02, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	$ 0
Document Period End Date	Jul. 02, 2021
US Treasury and Government [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		$ 300
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		$ 200