Revenue from Contracts with Customers - Change in Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2022	Jun. 30, 2021	Jun. 29, 2022	Jun. 30, 2021	Dec. 29, 2021
Gift card liability
Change in Contract with Customer, Liability [Roll Forward]
Revenue recognized - beginning balance	$ 313	$ 286	$ 732	$ 689
Franchise revenue
Change in Contract with Customer, Liability [Roll Forward]
Loyalty rewards liability, beginning balance			6,328	5,628	$ 5,628
Revenue recognized - beginning balance			(383)	(349)
Additional contract liability			495	384
Loyalty rewards liability, ending balance	$ 6,440	$ 5,663	$ 6,440	$ 5,663	$ 6,328