CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 24, 2025	Sep. 25, 2024	Sep. 24, 2025	Sep. 25, 2024
Revenue
Total revenue	$ 121,520	$ 120,395	$ 366,531	$ 358,724
Cost of operations
Food and paper cost	24,879	25,401	75,114	76,751
Labor and related expenses	30,648	32,744	94,982	96,192
Occupancy and other operating expenses	26,730	26,088	79,144	74,609
Company restaurant expenses	82,257	84,233	249,240	247,552
General and administrative expenses	12,343	11,418	37,138	35,130
Franchise expenses	11,407	10,488	36,476	31,961
Depreciation and amortization	3,973	4,034	11,789	11,755
Loss on disposal of assets	73	77	127	181
Gain on recovery of insurance proceeds, net				(41)
Loss on disposition of restaurants				7
Impairment and closed-store reserves	9	8	26	45
Total operating expenses	110,062	110,258	334,796	326,590
Income from operations	11,458	10,137	31,735	32,134
Interest expense, net	1,122	1,536	3,505	4,627
Income before provision for income taxes	10,336	8,601	28,230	27,507
Provision for income taxes	2,978	2,415	8,284	7,776
Net income	$ 7,358	$ 6,186	$ 19,946	$ 19,731
Net income per share
Basic (usd per share)	$ 0.25	$ 0.21	$ 0.68	$ 0.66
Diluted (usd per share)	$ 0.25	$ 0.21	$ 0.68	$ 0.65
Weighted-average shares used in computing net income per share
Basic (shares)	29,219,480	29,199,971	29,134,766	30,072,637
Diluted (shares)	29,406,754	29,423,649	29,343,906	30,235,309
Company-operated restaurant revenue
Revenue
Total revenue	$ 100,721	$ 101,178	$ 303,404	$ 300,638
Franchise revenue
Revenue
Total revenue	12,864	11,330	39,419	34,329
Franchise advertising fee revenue
Revenue
Total revenue	$ 7,935	$ 7,887	$ 23,708	$ 23,757