Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Future Rental Payments under Noncancelable Operating Leases (Detail)

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Commitments and Contingencies - Future Rental Payments under Noncancelable Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Leases [Abstract]  
2015 $ 691us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear
2016 953us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 238us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Total $ 1,882us-gaap_OperatingLeasesFutureMinimumPaymentsDue