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RELATED PARTY TRANSACTIONS (Compensation expense recognized for key management personnel) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 03, 2021
Dec. 29, 2019
Related Party [Abstract]    
Short-term employee benefits $ 7,754 $ 5,338
Post-employment benefits 170 204
Share-based payments 1,721 11,066
Key management personnel compensation $ 9,645 $ 16,608