Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 29, 2020	Dec. 31, 2019
Deferred tax assets (liabilities):
Loss carry forwards	$ 37,852	$ 30,255
Deferred franchise revenue	1,506	909
Property, equipment and intangible assets	(11,063)	(8,242)
Stock-based compensation	1,384	1,376
Tax credit carry forwards	4,326	3,936
Inventory smallwares	(1,740)	(1,748)
Other accrued expenses	1,861	533
Operating lease assets	(53,748)	(55,725)
Operating lease liabilities	63,799	67,166
Other	1,103	756
Total deferred tax assets	45,280	39,216
Valuation allowance	(45,520)	(39,416)
Net deferred tax liabilities	$ (240)	$ (200)