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INVENTORIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Mar. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 18,475 $ 15,311
Work in process 222 819
Finished goods 6,617 5,376
Deferred costs 1,986 721
Total inventories $ 27,300 $ 22,227