Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2021	Mar. 31, 2020	Dec. 29, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected unredeemed percent	9.00%
Estimated redemption period	24 months
Gift card liability, current	$ 2,332		$ 2,551
Revenue recognized for redemption of gift cards	$ 1,100	$ 1,500
Period in which initial fees received from franchisees will be recognized as revenue	20 years
Deferred revenue	$ 418		427
Accrued Expenses and Other Current Liabilities
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gift card liability, current	2,300		2,600
Other Long-term Liabilities
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gift card liability, non-current	$ 400		$ 600