Annual report pursuant to Section 13 and 15(d)

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

v3.23.1
Net income (loss) per share, Anti-dilutive Securities Excluded from Computation of Net Income (Loss) per Share (Details) - shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
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) 7,145,201 7,282,999
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 2,346,879 2,096,836
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) 0 6,970
Former Rexahn Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 60,713 66,538
Former Rexahn Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 0 82