Fair Value of Financial Instruments - Warrant Liability Measured at Fair Value on a Recurring Basis (Detail) - Recurring [Member] - Tradable Warrants [Member] |
Sep. 30, 2016
USD ($)
|
---|---|
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
Warrant liability | $ 3,342,340 |
Level 3 [Member] | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
Warrant liability | $ 3,342,340 |