Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2025	Dec. 31, 2024	Jan. 02, 2024
Revenue:
Total revenue		$ 495,089	$ 493,271	$ 503,405
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Other restaurant operating costs		98,876	95,032	91,559
General and administrative		49,137	50,824	51,833
Depreciation and amortization		27,047	29,066	26,792
Pre-opening		225	1,543	2,215
Restaurant impairments, closure costs and asset disposals		26,262	20,268	8,400
Total costs and expenses		526,678	521,049	508,434
Loss from operations		(31,589)	(27,778)	(5,029)
Interest expense, net		10,915	8,381	4,803
Loss before income taxes		(42,504)	(36,159)	(9,832)
Provision for income taxes		64	54	24
Net loss		$ (42,568)	$ (36,213)	$ (9,856)
Loss per Class A and Class B common stock, combined(1)
Basic (USD per share)	[1]	$ (7.36)	$ (6.37)	$ (1.72)
Diluted (USD per share)	[1]	$ (7.36)	$ (6.37)	$ (1.72)
Weighted average Class A and Class B common stock outstanding, combined(1)
Basic (in shares)	[1]	5,787,255	5,683,216	5,732,965
Diluted (in shares)	[1]	5,787,255	5,683,216	5,732,965
Restaurant revenue
Revenue:
Total revenue		$ 485,103	$ 483,097	$ 492,648
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Restaurant operating costs		127,168	123,692	124,102
Franchising royalties and fees, and other
Revenue:
Total revenue		9,986	10,174	10,757
Labor
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Restaurant operating costs		153,342	154,258	157,608
Occupancy
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Restaurant operating costs		$ 44,621	$ 46,366	$ 45,925

[1] Shares and per share amounts have been retroactively adjusted to reflect the decreased number of shares resulting from a 1-for-8 reverse stock split.