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Accounts Receivable, net (Tables)
 3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Summary of accounts receivable, net
Accounts receivable, net, consists of the following: 
 
March 31,
2017
 
December 31,
2016
 
(in thousands)
Accounts receivable, gross
$
26,432

 
$
39,869

Less allowance for doubtful accounts
(1,112
)
 
(142
)
Total accounts receivable, net
$
25,320

 
$
39,727