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Accounts Receivable
6 Months Ended
Jun. 30, 2018
Receivables [Abstract]  
Accounts Receivable
Accounts Receivable 
The components of accounts receivable are as follows:
 
As of
 
June 30,
 
December 31,
 
2018
 
2017
Accounts receivable, gross
$
76,032

 
$
70,941

Less: Allowance for doubtful accounts
(435
)
 
(357
)
Accounts receivable, net
$
75,597

 
$
70,584