Quarterly report pursuant to Section 13 or 15(d)

Net Income Loss Per Share - Effect of Anti-dilutive Securities (Detail)

v3.20.2
Net Income Loss Per Share - Effect of Anti-dilutive Securities (Detail) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of Anti-dilutive Securities 11,846,124 11,422,619 11,462,541 11,012,554
Employee Stock Option and Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of Anti-dilutive Securities 10,171,737 10,125,468 9,976,772 9,715,403
Warrant [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Effect of Anti-dilutive Securities 1,674,387 1,297,151 1,485,769 1,297,151