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COSTS AND ESTIMATED PROFITS ON UNCOMPLETED CONTRACTS (Tables)
 3 Months Ended
Mar. 31, 2021
Contractors [Abstract]  
Schedule of Costs and Estimated Earnings on Uncompleted Contracts Included in Condensed Consolidated Balance Sheets Costs and estimated profits on uncompleted contracts and related amounts billed were as follows (in thousands):
 March 31, 2021December 31, 2020
Costs incurred on uncompleted contracts$29,426 $36,969 
Estimated profits, thereon5,259 6,711 
Total34,685 43,680 
Less: billings to date26,217 29,315 
Net$8,468 $14,365 

Such amounts were included in the accompanying condensed Consolidated Balance Sheets for March 31, 2021 and December 31, 2020 under the following captions (in thousands):
 March 31, 2021December 31, 2020
Costs and estimated profits in excess of billings$14,415 $18,459 
Billings in excess of costs and estimated profits(5,950)(4,061)
Translation adjustment3 (33)
Net$8,468 $14,365