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COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Schedule of costs and estimated earnings on uncompleted contracts [Abstract]    
Costs incurred on uncompleted contracts $ 62,561 $ 51,017
Estimated profits, thereon 12,632 10,771
Total 75,193 61,788
Less: billings to date 48,387 41,223
Net 26,806 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 30,376 32,455
Billings in excess of costs and estimated profits (3,569) (11,871)
Translation adjustment (1) (19)
Net 26,806 $ 20,565
Balances previously classified as contract liabilities at the beginning of the period that have shipped $ 11,700