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Accounts Receivable, Net (Tables)
 12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
Schedule of Components of Accounts Receivable
The components of accounts receivable, net are as follows (in thousands):
 
December 31,
 
2017
 
2016
Accounts receivable
$
44,554

 
$
33,406

Allowance for doubtful accounts
(1,449
)
 
(1,282
)
Allowance for product returns
(2,471
)
 
(2,314
)
Accounts receivable, net
$
40,634

 
$
29,810