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TRADE ACCOUNTS RECEIVABLE (Allowance for doubtful accounts) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 03, 2021
Dec. 29, 2019
Changes in allowance account for credit losses of financial assets [abstract]    
Balance, beginning of fiscal year $ (7,184)  
Balance, end of fiscal year (18,994) $ (7,184)
Allowance for doubtful accounts    
Changes in allowance account for credit losses of financial assets [abstract]    
Balance, beginning of fiscal year (7,184) (7,547)
Impairment of trade accounts receivable (15,453) (27,652)
Write-off of trade accounts receivable 3,643 28,015
Balance, end of fiscal year $ (18,994) $ (7,184)