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Accounts Receivable - Schedule of Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Mar. 31, 2014
Receivables [Abstract]    
Accounts receivable (billed) $ 10,401us-gaap_BilledContractReceivables $ 6,113us-gaap_BilledContractReceivables
Accounts receivable (unbilled) 393us-gaap_UnbilledContractsReceivable 1,459us-gaap_UnbilledContractsReceivable
Less: Allowance for doubtful accounts (16)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent (16)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accounts receivable, net $ 10,778us-gaap_AccountsReceivableNetCurrent $ 7,556us-gaap_AccountsReceivableNetCurrent