SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Risk (Details) - item	12 Months Ended
	Dec. 25, 2024	Dec. 27, 2023	Dec. 28, 2022
Accounts Receivable
Concentration of Risk
Number Of Franchisee	1
Supplier Concentration Risk | Accounts Payable
Concentration of Risk
Number Of Suppliers	1	1
Supplier Concentration Risk | Supplier One | Accounts Payable
Concentration of Risk
Percentage of concentration	19.70%	15.10%
Supplier Concentration Risk | Largest Supplier One | Purchased
Concentration of Risk
Percentage of concentration	24.10%	26.60%	28.50%
Geographic Concentration Risk | Revenue
Concentration of Risk
Percentage of concentration	100.00%	100.00%	100.00%
Franchised | Accounts Receivable
Concentration of Risk
Number Of Franchisee		1
Franchised | Geographic Concentration Risk | Accounts Receivable
Concentration of Risk
Percentage of concentration	28.40%	11.40%
Greater Los Angeles area market | Geographic Concentration Risk | Revenue
Concentration of Risk
Percentage of concentration	72.00%	71.30%	71.20%