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Accounts Receivable - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Receivables [Abstract]    
Accounts receivable write-offs $ 0us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs $ 0us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs