Quarterly report pursuant to Section 13 or 15(d)

Net loss per share (Details)

v3.21.2
Net loss per share (Details) - shares
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 7,282,999 0
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 2,072,998 1,241,371
Unissued Stock Awards [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 5,047 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) 82 0