Quarterly report pursuant to Section 13 or 15(d)

Net loss per share (Details)

v3.22.1
Net loss per share (Details) - shares
 3 Months Ended
Mar. 31, 2022
Mar. 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) 7,282,999 7,374,172
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 2,616,544 1,818,612
Unissued Common Stock for Services [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 8,024 4,474
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