Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Anti-dilutive Securities (Details)

v3.21.2
Net Loss Per Share - Anti-dilutive Securities (Details) - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jan. 31, 2021
Nantahala          
Anti-dilutive securities          
Number of shares available under warrant (in shares) 1,676,923   1,676,923   1,676,923
Stock options          
Anti-dilutive securities          
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding (in shares) 12,645,410 9,363,265 12,645,410 9,363,265  
Warrants on common stock          
Anti-dilutive securities          
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding (in shares) 4,406,224 4,024,708 4,406,224 4,024,708  
Restricted Stock Units          
Anti-dilutive securities          
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding (in shares) 77,916 155,833 77,916 155,833  
Underwriters’ unit purchase option          
Anti-dilutive securities          
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding (in shares) 0 40,000 0 40,000