COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]
Costs incurred on uncompleted contracts	$ 23,976	$ 25,214
Estimated profits, thereon	5,420	6,274
Total	29,396	31,488
Less: billings to date	14,173	15,864
Net	15,223	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	19,218	18,421
Billings in excess of costs and estimated profits on uncompleted contracts	(4,000)	(2,813)
Translation adjustment	5	16
Net	$ 15,223	$ 15,624