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DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Inventory, net (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 28,789 $ 20,260
Work in process 450 215
Finished goods 39,037 34,981
Inventory, net $ 68,276 $ 55,456