Income Taxes Effective Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax provision (benefit)	$ (16,036)	$ (10,119)	$ (4,865)
State income taxes (benefit), net of federal provision (benefit)	(4,085)	(2,934)	(726)
Employment tax credits	(2,817)	(3,274)	(2,585)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	21,065	11,272	13,138
Non-deductible expenses	597	431	214
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	684	127	525
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	(163)	312
Miscellaneous	(197)	(499)	281
Provision (benefit) for income taxes	$ (789)	$ (5,159)	$ 6,294