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INVENTORIES (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Inventory, Net [Abstract]    
Raw materials $ 2,162 $ 1,821
Work-in-progress 1,477 1,348
Finished goods 265 535
Total inventories 3,904 3,704
Inventory write-offs $ 293 $ 588