Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share of Common Stock - Schedule of Computation of Basic and Diluted Loss Per Share for Common Stockholders (Detail)

v3.10.0.1
Net Loss Per Share of Common Stock - Schedule of Computation of Basic and Diluted Loss Per Share for Common Stockholders (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]        
Net loss $ (4,377,747) $ (1,575,098) $ (43,620,120) $ (10,760,150)
Weighted average shares of common stock outstanding 77,447,599 64,960,354 74,934,774 49,509,486
Net loss per share of common stock-basic and diluted $ (0.06) $ (0.02) $ (0.58) $ (0.22)