Quarterly report pursuant to Section 13 or 15(d)

Net loss per share, Anti-dilutive Securities Excluded from Computation of Net Loss per Share (Details)

v3.21.1
Net loss per share, Anti-dilutive Securities Excluded from Computation of Net Loss per Share (Details) - shares
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Series A Warrants and Series B Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 7,374,172 0
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 1,818,612 1,029,781
Restricted Stock Awards [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 4,474 0
Former Rexahn Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 66,538 0
Former Rexahn Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 123 0