Income Taxes Effective Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Jan. 02, 2022	Oct. 03, 2021	Jul. 04, 2021	Jan. 03, 2021	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax provision (benefit)					$ (10,119)	$ (4,865)	$ (9,249)
State income taxes (benefit), net of federal provision (benefit)					(2,934)	(726)	(1,655)
Employment tax credits					(3,274)	(2,585)	(2,938)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 7,100	$ 1,600	$ 2,600	$ 12,900	11,272	13,138	0
Non-deductible expenses					431	214	1,374
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount					127	525	308
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount					(163)	312	0
Miscellaneous					(499)	281	37
Provision (benefit) for income taxes					$ (5,159)	$ 6,294	$ (12,123)