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Balance Sheet Components - Inventory (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Supplemental Balance Sheet Disclosures [Abstract]    
Raw materials $ 1,442 $ 1,391
Work in process 616 2,142
Finished goods 16,431 11,614
Inventory $ 18,489 $ 15,147