Quarterly report pursuant to Section 13 or 15(d)

Net loss per share (Details)

v3.23.1
Net loss per share (Details) - shares
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
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) 7,204,299 7,282,999
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 3,601,427 2,616,544
RSUs [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 291,584 0
Unissued Common Stock for Services [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 0 8,024
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