Annual report pursuant to Section 13 and 15(d)

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

v3.22.1
Net loss per share, Anti-dilutive Securities Excluded from Computation of Net Loss per Share (Details) - shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Series A, Series B and RDO Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 7,282,999 6,331,674
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 2,096,836 1,784,198
Restricted Stock Awards Including Pending Issuances of Stock for Services [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 6,970 40,000
Former Rexahn Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 66,538 66,538
Former Rexahn Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 82 123