Revenue from Contracts with Customers - Change in Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2021	Sep. 23, 2020	Sep. 29, 2021	Sep. 23, 2020	Dec. 30, 2020
Change in Contract with Customer, Liability [Roll Forward]
Contract with Customer, Liability			$ 5,628	$ 6,317	$ 6,317
Revenue recognized - beginning balance			(514)	(900)
Additional contract liability			1,330	10
Contract with Customer, Liability	$ 6,444	$ 5,427	6,444	5,427	$ 5,628
Gift card liability
Change in Contract with Customer, Liability [Roll Forward]
Revenue recognized - beginning balance	$ (88)	$ (138)	$ (1,509)	$ (890)