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ACCOUNTS RECEIVABLE (Details) - USD ($)
$ in Thousands
Dec. 28, 2018
Sep. 28, 2018
Dec. 29, 2017
Receivables [Abstract]      
Allowances for doubtful accounts receivable $ 1,327 $ 1,637 $ 2,328
Accounts receivable, net $ 55,558 $ 40,866 $ 71,895