Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 27, 2025	Sep. 28, 2024
Deferred tax assets [Abstract]
Net operating loss carryforwards	$ 56,549	$ 55,785
Allowance for doubtful accounts	323	272
Inventory	742	873
Deferred revenue	429	486
Other accruals	8,735	4,026
Total deferred tax assets	66,778	61,442
Deferred tax liabilities [Abstract]
Intangible assets	1,886	278
Property, plant and equipment	10,362	8,949
Total deferred tax liabilities	12,248	9,227
Net deferred tax assets	54,530	52,215
Valuation allowance	(53,784)	(50,888)
Net deferred tax assets	$ 746	$ 1,327