CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2024	Jun. 28, 2023	Jun. 26, 2024	Jun. 28, 2023
Revenue
Total revenue	$ 122,176	$ 121,492	$ 238,329	$ 236,018
Cost of operations
Food and paper cost	25,731	28,474	51,350	55,376
Labor and related expenses	32,868	32,277	63,448	63,818
Occupancy and other operating expenses	24,656	25,576	48,521	50,462
Gain on recovery of insurance proceeds, lost profits, net				(151)
Company restaurant expenses	83,255	86,327	163,319	169,505
General and administrative expenses	11,787	11,108	23,712	22,307
Franchise expenses	10,871	9,492	21,473	18,524
Depreciation and amortization	3,870	3,694	7,721	7,331
Loss (gain) on disposal of assets	63	(80)	104	(50)
Gain on recovery of insurance proceeds, property, equipment and expenses			(41)	(242)
Loss (gain) on disposition of restaurants	7	25	7	(111)
Impairment and closed-store reserves	5	38	37	115
Total expenses	109,858	110,604	216,332	217,379
Income from operations	12,318	10,888	21,997	18,639
Interest expense, net	1,527	976	3,091	1,980
Income tax receivable agreement expense (income)	0	121	0	(1)
Income before provision for income taxes	10,791	9,791	18,906	16,660
Provision for income taxes	3,158	2,735	5,361	4,686
Net income	$ 7,633	$ 7,056	$ 13,545	$ 11,974
Net income per share
Basic (usd per share)	$ 0.25	$ 0.20	$ 0.44	$ 0.33
Diluted (usd per share)	$ 0.25	$ 0.20	$ 0.44	$ 0.33
Weighted-average shares used in computing net income per share
Basic (shares)	30,240,170	35,433,414	30,508,970	35,833,759
Diluted (shares)	30,378,048	35,534,104	30,661,830	36,018,288
Company-operated restaurant revenue
Revenue
Total revenue	$ 102,307	$ 103,901	$ 199,460	$ 201,774
Franchise revenue
Revenue
Total revenue	11,651	10,119	22,999	19,791
Franchise advertising fee revenue
Revenue
Total revenue	$ 8,218	$ 7,472	$ 15,870	$ 14,453