COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]
Costs incurred on uncompleted contracts	$ 36,969	$ 51,017
Estimated profits, thereon	6,711	10,771
Total	43,680	61,788
Less: billings to date	29,315	41,223
Net	14,365	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	18,459	32,455
Billings in excess of costs and estimated profits	(4,061)	(11,871)
Translation Adjustment	(33)	(19)
Net	14,365	$ 20,565
Balances previously classified as contract liabilities at the beginning of the period shipped during fiscal year	$ 11,900