COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]
Costs incurred on uncompleted contracts	$ 31,584	$ 25,214
Estimated profits, thereon	3,097	6,274
Total	34,681	31,488
Less: billings to date	13,530	15,864
Net	21,151	15,624
Schedule of Costs and Estimated Earnings on Uncompleted Contracts Included in Condensed Consolidated Balance Sheets [Abstract]
Costs and estimated profits in excess of billings on uncompleted contracts	24,191	18,421
Billings in excess of costs and estimated profits on uncompleted contracts	(3,032)	(2,813)
Translation adjustment	(8)	16
Net	$ 21,151	$ 15,624