LEASES - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 25, 2024	Dec. 27, 2023
Lessee, Lease, Description [Line Items]
Amortization of right-of-use assets	$ 202	$ 176	$ 75
Interest on lease liabilities	55	54	45
Fixed rent cost	29,956	28,619	27,984
Short-term lease cost	52	1	8
Variable lease cost	1,983	1,897	1,825
Sublease income	(7,244)	(7,053)	(5,570)
Total lease cost	25,004	23,694	24,367
Occupancy and other operating expenses
Lessee, Lease, Description [Line Items]
Total lease cost	24,042	23,046	23,736
General & administrative
Lessee, Lease, Description [Line Items]
Total lease cost	704	366	492
Depreciation and amortization
Lessee, Lease, Description [Line Items]
Total lease cost	192	176	75
Interest expense
Lessee, Lease, Description [Line Items]
Total lease cost	55	54	45
Closed-store reserve
Lessee, Lease, Description [Line Items]
Total lease cost	11	52	19
Property Leases
Lessee, Lease, Description [Line Items]
Amortization of right-of-use assets	84	76	73
Interest on lease liabilities	41	36	40
Fixed rent cost	29,544	28,287	27,597
Variable lease cost	534	553	546
Sublease income	(7,244)	(7,053)	(5,570)
Total lease cost	22,959	21,899	22,686
Equipment Leases
Lessee, Lease, Description [Line Items]
Amortization of right-of-use assets	118	100	2
Interest on lease liabilities	14	18	5
Fixed rent cost	412	332	387
Short-term lease cost	52	1	8
Variable lease cost	1,449	1,344	1,279
Total lease cost	$ 2,045	$ 1,795	$ 1,681