Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2022	Jun. 29, 2021	Jun. 28, 2022	Jun. 29, 2021	Dec. 28, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected unredeemed percent			9.00%
Estimated redemption period			24 months
Gift card liability, current	$ 2,447		$ 2,447		$ 2,850
Revenue recognized for redemption of gift cards	800	$ 800	$ 1,800	$ 1,900
Period in which initial fees received from franchisees will be recognized as revenue			20 years
Loyalty program deferred revenue	500		$ 500		400
Accrued Expenses and Other Current Liabilities
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gift card liability, current	2,400		2,400		2,900
Other Long-term Liabilities
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gift card liability, non-current	$ 400		$ 400		$ 600