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Inventory - Schedule of Inventory (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Mar. 31, 2015
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Inventory Disclosure [Abstract] |  |
Raw materials | $ 9,665 | $ 9,411
Work-in-process | 3,411 | 2,117
Finished goods | 3,215 | 7,487
Deferred program costs | 2,221 | 1,581
Net inventory | $ 18,512 | $ 20,596

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