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INVENTORIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Inventory, Net [Abstract]      
Raw materials $ 2,667 $ 1,821  
Work-in-progress 1,867 1,348  
Finished goods 359 535  
Total inventories 4,893 3,704  
Inventory write-offs $ 530 $ 588 $ 788