COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]
Costs incurred on uncompleted contracts	$ 53,626	$ 37,899
Estimated profits, thereon	6,504	2,665
Total	60,130	40,564
Less: billings to date	25,265	17,881
Net	34,865	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	37,943	26,915
Billings in excess of costs and estimated profits	(3,075)	(4,249)
Translation adjustment	(3)	17
Net	$ 34,865	$ 22,683