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Fair Value of Financial Instruments - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Detail) (Fair Value on a Recurring Basis, USD $)
Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Derivative liability related to fair value of warrants $ 6,201,233us-gaap_DerivativeLiabilities
Total 6,201,233us-gaap_FinancialLiabilitiesFairValueDisclosure
Level 3  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Derivative liability related to fair value of warrants 6,201,233us-gaap_DerivativeLiabilities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Total $ 6,201,233us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember