Guarantees, Commitments and Contingencies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 30, 2022
Cash paid for amounts included in the measurement of lease liabilities
Financing cash flows - finance leases	$ 589	$ 570	$ 1,132
Operating cash flows - operating leases	2,442	2,688
Financing cash flows - finance leases	40	60
Right-of-use assets exchanged for lease liabilities
Operating leases	$ 1,682	$ 626	$ 1,424