Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 24, 2022	Dec. 25, 2021	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Current [Abstract]
Federal			$ 8	$ 10	$ 7
State and local			955	1,057	1,001
Total current taxes			963	1,067	1,008
Deferred [Abstract]
Deferred	$ (295)	$ (638)	(295)	(638)	102
Provision for income taxes - current and deferred			$ 668	$ 429	$ 1,110