Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 25, 2020
Revenue
Total revenue	$ 107,721	$ 105,163
Cost of operations
Food and paper cost	24,391	25,562
Labor and related expenses	30,732	28,693
Occupancy and other operating expenses	23,844	22,109
Company restaurant expenses	78,967	76,364
General and administrative expenses	10,474	9,331
Franchise expenses	7,751	6,911
Depreciation and amortization	3,938	4,369
Loss on disposal of assets	26	100
Impairment and closed-store reserves	564	2,402
Total expenses	101,720	99,477
Income from operations	6,001	5,686
Interest expense, net	517	905
Income tax receivable agreement income	(77)	(120)
Income before provision for income taxes	5,561	4,901
Provision for income taxes	1,597	1,301
Net income	$ 3,964	$ 3,600
Net income per share
Basic (usd per share)	$ 0.11	$ 0.10
Diluted (usd per share)	$ 0.11	$ 0.10
Weighted-average shares used in computing net income per share
Basic (shares)	35,795,205	34,659,160
Diluted (shares)	36,424,068	35,347,456
Company-operated restaurant revenue
Revenue
Total revenue	$ 94,161	$ 92,634
Franchise revenue
Revenue
Total revenue	7,612	7,062
Franchise advertising fee revenue
Revenue
Total revenue	$ 5,948	$ 5,467