Annual report pursuant to Section 13 and 15(d)

Inventories - Major Classifications of Inventories (Detail)

v3.20.1
Inventories - Major Classifications of Inventories (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Mar. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 3,061 $ 2,787
Work in process 18,018 20,553
Finished products 1,212 1,330
Total $ 22,291 $ 24,670