Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Common Share - Anti-Dilutive Securities (Details)

v3.21.1
Net Loss per Common Share - Anti-Dilutive Securities (Details) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 15,785,000 11,375,000
Stock options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares)   9,685,000
Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share (in shares) 1,014,000 1,690,000