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Current Receivables (Tables)
6 Months Ended
Jun. 30, 2018
Receivables [Abstract]  
Current receivables
Current receivables are comprised of the following:
 
June 30, 2018
December 31, 2017
Customer receivables
$
4,891

$
4,700

Related parties
744

801

Other
736

844

Total current receivables
6,371

6,345

Less: Allowance for doubtful accounts
(333
)
(330
)
Total current receivables, net
$
6,038

$
6,015