Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Mar. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 32,876 $ 32,892
Work in process 4,804 5,696
Finished goods 30,078 28,501
Inventories, gross 67,758 67,089
Valuation reserves (1,979) (2,199)
Inventories, net $ 65,779 $ 64,890