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ACCOUNTS RECEIVABLE, NET (Tables)
 9 Months Ended
Sep. 30, 2018
Receivables [Abstract]  
Schedule of Accounts Receivable, Net
Accounts receivable consists of the following (unaudited)(in thousands):
 
 
 
September 30, 2018
 
December 31, 2017
Contract billings
 
$
2,907

 
$
3,751

Retainage
 
291

 
274

Subtotal
 
3,198

 
4,025

Less – allowance for doubtful accounts
 
(70
)
 
(185
)
Accounts receivable, net
 
$
3,128

 
$
3,840