Selected Balance Sheet Information - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 30, 2023	Sep. 30, 2023	Dec. 24, 2022	Sep. 24, 2022
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents, end of period	$ 6,280	$ 3,514	$ 6,078
Restricted cash included in other current assets	3,454	2,392
Restricted cash included in other assets (noncurrent)	8,265	8,168
Total cash, cash equivalents, and restricted cash shown on the condensed consolidated statements of cash flows	$ 17,999	$ 14,074	$ 6,078	$ 4,100