Income Taxes - Difference Between Expected Income Tax Benefits and Income Tax Benefit Recorded in the Financial Statements (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Income Tax Disclosure [Abstract] | ||
| Income taxes benefit computed at statutory rate | $ (2,380,073) | $ (1,342,859) |
| State income tax benefit, net | (241,633) | (136,332) |
| Other | 74,355 | 20,950 |
| Change in valuation allowance | 2,547,351 | 1,458,241 |
| Expected income tax benefits and income tax benefits recorded | $ 0 | $ 0 |