Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2022	Sep. 29, 2021	Sep. 28, 2022	Sep. 29, 2021
Revenue
Total revenue	$ 119,878	$ 115,700	$ 354,037	$ 345,406
Cost of operations
Food and paper cost	30,163	26,698	89,586	78,971
Labor and related expenses	33,279	27,802	98,966	90,060
Occupancy and other operating expenses	26,920	25,108	76,597	74,288
Company restaurant expenses	90,362	79,608	265,149	243,319
General and administrative expenses	9,855	9,357	29,488	30,354
Franchise expenses	9,027	8,545	27,315	24,457
Depreciation and amortization	3,530	3,685	10,745	11,540
Loss on disposal of assets	21	83	129	194
Loss on disposition of restaurants		10		1,534
Impairment and closed-store reserves	219	167	598	1,091
Total expenses	113,014	101,455	333,424	312,489
Income from operations	6,864	14,245	20,613	32,917
Interest expense, net	108	449	957	1,399
Income tax receivable agreement income	(29)	(19)	(345)	(69)
Income before provision for income taxes	6,785	13,815	20,001	31,587
Provision for income taxes	1,776	3,654	5,736	8,644
Net income	$ 5,009	$ 10,161	$ 14,265	$ 22,943
Net income per share
Basic (usd per share)	$ 0.14	$ 0.28	$ 0.39	$ 0.64
Diluted (usd per share)	$ 0.14	$ 0.28	$ 0.39	$ 0.63
Weighted-average shares used in computing net income per share
Basic (shares)	36,402,899	36,067,754	36,329,938	35,930,246
Diluted (shares)	36,507,050	36,525,424	36,491,624	36,457,110
Company-operated restaurant revenue
Revenue
Total revenue	$ 103,174	$ 99,986	$ 303,585	$ 301,117
Franchise revenue
Revenue
Total revenue	9,543	8,918	28,862	24,919
Franchise advertising fee revenue
Revenue
Total revenue	$ 7,161	$ 6,796	$ 21,590	$ 19,370