Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2022	Mar. 30, 2021
Revenue:
Total revenue	$ 112,562	$ 109,577
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Other restaurant operating costs	21,866	20,205
General and administrative	11,840	10,929
Depreciation and amortization	5,721	5,587
Pre-opening	408	58
Restaurant impairments, closure costs and asset disposals	1,389	1,231
Total costs and expenses	118,637	110,942
Loss from operations	(6,075)	(1,365)
Interest expense, net	437	622
Loss before taxes	(6,512)	(1,987)
Benefit from income taxes	(83)	(10)
Net loss	$ (6,429)	$ (1,977)
Loss per Class A and Class B common stock, combined
Basic (USD per share)	$ (0.14)	$ (0.04)
Diluted (USD per share)	$ (0.14)	$ (0.04)
Weighted average shares of Class A and Class B common stock outstanding, combined:
Basic (in shares)	45,726,500	45,098,028
Diluted (in shares)	45,726,500	45,098,028
Restaurant revenue
Revenue:
Total revenue	$ 109,961	$ 107,744
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Restaurant operating costs	30,771	26,977
Franchising royalties and fees, and other
Revenue:
Total revenue	2,601	1,833
Labor
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Restaurant operating costs	35,493	34,306
Occupancy
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Restaurant operating costs	$ 11,149	$ 11,649