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Inventory - Schedule of Inventory (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 9,411us-gaap_InventoryRawMaterials	$ 3,304us-gaap_InventoryRawMaterials
Work-in-process	2,117us-gaap_InventoryWorkInProcess	4,047us-gaap_InventoryWorkInProcess
Finished goods	7,487us-gaap_InventoryFinishedGoods	10,275us-gaap_InventoryFinishedGoods
Deferred program costs	1,581us-gaap_InventoryForLongTermContractsOrPrograms	3,068us-gaap_InventoryForLongTermContractsOrPrograms
Net inventory	$ 20,596us-gaap_InventoryNet	$ 20,694us-gaap_InventoryNet

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Name Accounting Standards Codification

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-Subparagraph (SX 210.5-02.6(a)(1))

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Amount before valuation and LIFO reserves, and progress payments, of inventory associated with long-term contracts, expected to be sold, or consumed within one year or operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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-Name Regulation S-X (SX)

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