INCOME TAXES - Schedule of Income tax reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 25, 2024	Dec. 27, 2023
Tax reconciliation amount
US Federal Statutory Tax Rate	$ 7,891	$ 7,411	$ 7,324
State and Local Income Taxes, Net of Federal Income Tax Effect	2,580	2,157	2,185
WOTC Credit	(164)	(163)	(295)
Nontaxable or Nondeductible Items
Stock Option Exercise	62	32	33
Nondeductible Stock Option Expense	27	54	166
162(m) nondeductible executive compensation	614	6	194
Other	13	142	84
Deferred tax liability true up	66		(381)
Other		(34)	14
Total income tax expense (benefit)	$ 11,089	$ 9,605	$ 9,324
Tax Jurisdiction of Domicile [Extensible Enumeration]	country:US	country:US	country:US
Tax reconciliation percentage
US Federal Statutory Tax Rate	21.00%	21.00%	21.00%
State and Local Income Taxes, Net of Federal Income Tax Effect	6.90%	6.10%	6.30%
WOTC Credit	(0.40%)	(0.50%)	(0.70%)
Nontaxable or Nondeductible Items
Stock Option Exercise	0.20%	0.10%	0.10%
Nondeductible Stock Option Expense		0.20%	0.50%
162(m)	1.60%		0.60%
Other		0.40%
Deferred tax liability true up	0.20%		(1.10%)
Other		(0.10%)	0.00%
Total	29.50%	27.20%	26.70%
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration]	CALIFORNIA	CALIFORNIA	CALIFORNIA