COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]
Costs incurred on uncompleted contracts	$ 52,500	$ 51,017
Estimated profits, thereon	10,107	10,771
Total	62,607	61,788
Less: billings to date	45,233	41,223
Net	17,374	20,565
Schedule of Costs and Estimated Earnings on Uncompleted Contracts Included in Condensed Consolidated Balance Sheets [Abstract]
Costs and estimated profits in excess of billings	21,544	32,455
Billings in excess of costs and estimated profits	(4,168)	(11,871)
Translation adjustment	(2)	(19)
Net	17,374	$ 20,565
Balances previously classified as contract liabilities at the beginning of the period that have shipped	$ 11,700