Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2021	Dec. 29, 2020	Dec. 31, 2019
Current tax provision:
Federal	$ 0	$ 0	$ 0
State	41	44	36
Total current tax provision	41	44	36
Deferred tax provision:
Federal	23	30	52
State	6	10	16
Total deferred tax provision (benefit)	29	40	68
Total provision for income taxes	$ 70	$ 84	$ 104