Quarterly report pursuant to Section 13 or 15(d)

Inventories - Major Classifications of Inventories (Detail)

v3.20.2
Inventories - Major Classifications of Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Mar. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 3,302 $ 3,061
Work in process 14,832 18,018
Finished products 2,481 1,212
Total $ 20,615 $ 22,291