Exchange Agreements - Summary of Income Statement Effect of Changes in Outstanding Warrants (Detail) - USD ($) |
3 Months Ended | 9 Months Ended |
---|---|---|
Sep. 30, 2018 |
Sep. 30, 2018 |
|
Class of Warrant or Right [Line Items] | ||
Gain on warrants exchanged Q3 2018 | $ 779,923 | |
Common Stock Warrants [Member] | ||
Class of Warrant or Right [Line Items] | ||
Changes in fair value of warrants | $ 82,466 | (5,160) |
Loss on warrants exchanged Q2 2018 | (3,467,935) | |
Gain on warrants exchanged Q3 2018 | 779,923 | 779,923 |
Transaction Costs | (56,165) | (181,312) |
Change in fair value of warrant liability, including gain (loss) on exchange | $ 806,224 | $ (2,874,484) |