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Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Inventory [Line Items]
Raw materials and supplies	$ 6,722	$ 6,414
Work-in-progress	6,592	6,261
Finished goods	2,130	1,273
Inventories	$ 15,444us-gaap_InventoryNet	$ 13,948us-gaap_InventoryNet

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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