Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Net Income (Loss) Per Share of Common Stock - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share for Common Stockholders (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Earnings Per Share [Abstract]            
Net income (loss) $ (8,666,906) $ 11,587,015 $ (20,135,892) $ (19,106,481) $ 2,920,109 $ (39,242,373)
Shares used in computing basic net income (loss) per share 79,409,556   73,658,529   79,409,556 73,657,537
Basic net income (loss) per share $ (0.11)   $ (0.27)   $ 0.04 $ (0.53)
Shares used in computing diluted net income (loss) per share 79,406,556   73,658,529   79,457,926 73,657,537
Diluted net income (loss) per share $ (0.11)   $ (0.27)   $ 0.04 $ (0.53)