Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 24, 2022
Deferred tax assets [Abstract]
Net operating loss carryforwards	$ 48,910	$ 39,355
Allowance for doubtful accounts	246	368
Inventory	766	418
Deferred revenue	519	526
Other accruals	2,717	2,391
Total deferred tax assets	53,158	43,058
Deferred tax liabilities [Abstract]
Intangible assets	208	1,191
Property, plant and equipment	5,460	1,393
Total deferred tax liabilities	5,668	2,584
Net deferred tax assets	47,490	40,474
Valuation allowance	(46,163)	(39,442)
Net deferred tax assets	$ 1,327	$ 1,032