CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2024	Sep. 27, 2023	Sep. 25, 2024	Sep. 27, 2023
Revenue
Total revenue	$ 120,395	$ 120,399	$ 358,724	$ 356,417
Cost of operations
Food and paper cost	25,401	27,552	76,751	82,928
Labor and related expenses	32,744	33,092	96,192	96,910
Occupancy and other operating expenses	26,088	27,289	74,609	77,751
Gain on recovery of insurance proceeds, lost profits, net				(151)
Company restaurant expenses	84,233	87,933	247,552	257,438
General and administrative expenses	11,418	9,144	35,130	31,451
Franchise expenses	10,488	9,583	31,961	28,107
Depreciation and amortization	4,034	3,946	11,755	11,277
Loss (gain) on disposal of assets	77	16	181	(34)
Gain on recovery of insurance proceeds, property, equipment and expenses			(41)	(242)
(Gain) loss on disposition of restaurants		(4,923)	7	(5,034)
Impairment and closed-store reserves	8	1,008	45	1,123
Total expenses	110,258	106,707	326,590	324,086
Income from operations	10,137	13,692	32,134	32,331
Interest expense, net	1,536	1,382	4,627	3,362
Income tax receivable agreement expense	0	106	0	105
Income before provision for income taxes	8,601	12,204	27,507	28,864
Provision for income taxes	2,415	2,975	7,776	7,661
Net income	$ 6,186	$ 9,229	$ 19,731	$ 21,203
Net income per share
Basic (usd per share)	$ 0.21	$ 0.28	$ 0.66	$ 0.61
Diluted (usd per share)	$ 0.21	$ 0.28	$ 0.65	$ 0.60
Weighted-average shares used in computing net income per share
Basic (shares)	29,199,971	33,412,674	30,072,637	35,026,731
Diluted (shares)	29,423,649	33,490,004	30,235,309	35,179,483
Company-operated restaurant revenue
Revenue
Total revenue	$ 101,178	$ 102,703	$ 300,638	$ 304,477
Franchise revenue
Revenue
Total revenue	11,330	10,255	34,329	30,046
Franchise advertising fee revenue
Revenue
Total revenue	$ 7,887	$ 7,441	$ 23,757	$ 21,894