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COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]    
Costs incurred on uncompleted contracts $ 58,607 $ 51,017
Estimated profits, thereon 11,409 10,771
Total 70,016 61,788
Less: billings to date 38,753 41,223
Net 31,263 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 35,756 32,455
Billings in excess of costs and estimated profits (4,535) (11,871)
Translation adjustment 42 (19)
Net 31,263 $ 20,565
Balances previously classified as contract liabilities at the beginning of the period that have shipped $ 8,500