Quarterly report pursuant to Section 13 or 15(d)

Inventories - Major Classifications of Inventories (Detail)

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Inventories - Major Classifications of Inventories (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Mar. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 2,775 $ 2,763
Work in process 13,277 13,685
Finished products 666 689
Inventory Gross 16,718 17,137
Less - progress payments 4,915 3,143
Total $ 11,803 $ 13,994