Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Mar. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 17,580 $ 12,270
Work in process 2,685 1,769
Finished goods 24,797 21,310
Inventories, gross 45,062 35,349
Valuation reserves (1,572) (1,329)
Inventories, net $ 43,490 $ 34,020