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Accounts Receivable
 6 Months Ended
Jun. 30, 2019
Receivables [Abstract]  
Accounts Receivable ACCOUNTS RECEIVABLE
Accounts receivable consist of the following:
 
As of
June 30, 2019
 
As of
December 31, 2018
Accounts receivable
$
76,162

 
$
90,675

Allowance for doubtful accounts
(1,732
)
 
(1,748
)
Total
$
74,430

 
$
88,927