Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2021	Dec. 29, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Gift card liability, current	$ 2,850	$ 2,551
Revenue recognized for redemption of gift cards	3,200	3,500	$ 5,300
Gift card breakage	$ 300	300	400
Period in which initial fees received from franchisees will be recognized as revenue	20 years
Deferred revenue	$ 400	400
Initial fees from franchisees
Disaggregation of Revenue [Line Items]
Revenue recognized that was included in contract liability	100	100	$ 200
Accrued expenses and other current liabilities
Disaggregation of Revenue [Line Items]
Gift card liability, current	2,800	2,600
Other long-term liabilities
Disaggregation of Revenue [Line Items]
Gift card liability, non-current	$ 600	$ 600