Fair Value of Financial Instruments - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Detail) - Fair value on a recurring basis	Jun. 30, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability related to fair value of warrants	$ 3,182,504
Total	3,182,504
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability related to fair value of warrants	3,182,504
Total	$ 3,182,504