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SEGMENT INFORMATION - Accounts receivable balances of major customers (Details) - Accounts Receivable - Credit Concentration Risk
12 Months Ended
Dec. 27, 2025
Dec. 28, 2024
Customer A    
SEGMENT INFORMATION    
Concentration risk percentage 39.00% 35.00%
Customer B    
SEGMENT INFORMATION    
Concentration risk percentage   23.00%
Customer C    
SEGMENT INFORMATION    
Concentration risk percentage 14.00% 13.00%
Customer D    
SEGMENT INFORMATION    
Concentration risk percentage 13.00%