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COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]    
Costs incurred on uncompleted contracts $ 57,655 $ 37,899
Estimated profits, thereon 7,448 2,665
Total 65,103 40,564
Less: billings to date 32,219 17,881
Net 32,884 22,683
Schedule of Costs and Estimated Earnings on Uncompleted Contracts Included in Condensed Consolidated Balance Sheets [Abstract]    
Costs and estimated profits in excess of billings 38,432 26,915
Billings in excess of costs and estimated profits (5,554) (4,249)
Translation adjustment 6 17
Net $ 32,884 $ 22,683