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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Accounts Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Balance Sheet Related Disclosures [Abstract]    
Accounts receivable trade $ 63,340 $ 54,055
Allowances for ship and debit (39,168) (40,118)
Allowances for stock rotation and rebate (3,101) (2,159)
Allowances for doubtful accounts (526) (706)
Total $ 20,545 $ 11,072