Annual report pursuant to Section 13 and 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 31,516 $ 12,270
Work in process 7,186 1,769
Finished goods 27,204 21,310
Inventories, gross 65,906 35,349
Valuation reserves (2,077) (1,329)
Inventories, net $ 63,829 $ 34,020