Fair Value of Financial Instruments - Schedule of Liabilities Measured at Fair Value on a Recurring Basis (Detail) - Fair value on a recurring basis	Sep. 30, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability related to fair value of warrants	$ 1,829,757
Total	1,829,757
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability related to fair value of warrants	1,829,757
Total	$ 1,829,757