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ACCOUNTS RECEIVABLE (Tables)
 12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
Accounts receivable, net of allowances
Accounts receivable, net of allowances, consisted of the following at December 31, 2017 and 2016 (in thousands):
 
December 31,
 
2017
 
2016
Accounts receivable
$
51,276

 
$
52,138

Less:
 
 
 
Allowance for doubtful accounts
(1,226
)
 
(757
)
Allowance for sales returns and rebates
(9,916
)
 
(7,861
)
Total
$
40,134

 
$
43,520