Annual report pursuant to Section 13 and 15(d)

Inventories - Major Classifications of Inventories (Detail)

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Inventories - Major Classifications of Inventories (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Mar. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 3,178 $ 2,763
Work in process 11,615 13,685
Finished products 659 689
Inventory Gross 15,452 17,137
Less – progress payments 4,641 3,143
Total $ 10,811 $ 13,994