CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2023	Dec. 28, 2022	Dec. 29, 2021
Revenue
Total revenue	$ 468,664	$ 469,959	$ 454,363
Cost of operations
Food and paper cost	108,250	117,774	104,394
Labor and related expenses	127,244	130,773	120,308
Occupancy and other operating expenses	101,398	101,543	97,557
Gain on recovery of insurance proceeds, lost profits, net	(327)
Company restaurant expenses	336,565	350,090	322,259
General and administrative expenses	42,025	39,093	39,852
Franchise expenses	38,404	36,169	32,831
Depreciation and amortization	15,235	14,418	15,176
Loss on disposal of assets	192	165	289
Gain on recovery of insurance proceeds, property, equipment and expenses	(247)
(Gain) loss on disposition of restaurants	(5,034)	(848)	1,534
Impairment and closed-store reserves	1,732	752	1,087
Total expenses	428,872	439,839	413,028
Income from operations	39,792	30,120	41,335
Interest expense, net	4,811	1,677	1,824
Income tax receivable agreement expense (income)	103	(436)	58
Income before provision for income taxes	34,878	28,879	39,453
Provision for income taxes	9,324	8,078	10,332
Net income	$ 25,554	$ 20,801	$ 29,121
Net income per share
Basic (usd per share)	$ 0.75	$ 0.57	$ 0.81
Diluted (usd per share)	$ 0.74	$ 0.57	$ 0.80
Weighted-average shares used in computing net income per share
Basic (shares)	34,253,542	36,350,579	35,973,892
Diluted (shares)	34,374,706	36,575,904	36,446,756
Company-operated restaurant revenue
Revenue
Total revenue	$ 398,437	$ 403,218	$ 394,733
Franchise revenue
Revenue
Total revenue	41,002	38,225	33,729
Franchise advertising fee revenue
Revenue
Total revenue	$ 29,225	$ 28,516	$ 25,901