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RELATED PARTY TRANSACTIONS (Details) - Key management personnel - USD ($)
12 Months Ended
Jan. 03, 2021
Dec. 29, 2019
Disclosure of transactions between related parties [line items]    
Expenses for airplane usage, related party transactions $ 0.7 $ 1,400,000
Amount in account payable, related party transactions 0.1 700,000
DSUs    
Disclosure of transactions between related parties [line items]    
Amount in account payable, related party transactions $ 8,433,000 $ 6,939,000