Income Taxes - Tax Rate Reconciliation, Prior Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2025	Dec. 31, 2024	Jan. 02, 2024
Income Tax Disclosure [Abstract]
Federal income tax (benefit) at federal rate	$ (8,931)	$ (7,730)	$ (2,065)
State income tax (benefit), net of federal tax	131	(1,793)	(420)
Other permanent differences	612	783	629
Tax credits		(1,400)	(1,513)
Change in valuation allowance	8,659	9,484	3,352
Tax rate change		74	0
Deferred tax asset write-off		630	78
Other items, net		6	(37)
Total provision for income taxes	$ 64	$ 54	$ 24
Effective income tax rate	(0.20%)	(0.10%)	(0.20%)