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Summary of Activity of Level 3 Inputs Measured on Recurring Basis (Detail)
3 Months Ended
Jun. 30, 2016
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Balance, beginning of period $ 2,811,111
Gain on change in fair value of warrant liability (822,222)
Balance, end of period $ 1,988,889