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RELATED PARTY TRANSACTIONS (Details) - Key management personnel - USD ($)
12 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Disclosure of transactions between related parties [line items]    
Expenses for airplane usage, related party transactions $ 1.4 $ 1.2
Amount in account payable, related party transactions 0.7 0.3
DSUs    
Disclosure of transactions between related parties [line items]    
Amount in account payable, related party transactions $ 6,939,000 $ 8,310,000