Quarterly report pursuant to Section 13 or 15(d)

Net loss per share (Details)

v3.22.2.2
Net loss per share (Details) - shares
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 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) 7,281,977 7,282,999 7,281,977 7,282,999
Stock Options [Member]        
Net Loss Per Share [Abstract]        
Antidilutive securities excluded from computation of net loss per share (in shares) 2,938,044 2,072,998 2,938,044 2,072,998
Unissued Common Stock for Services [Member]        
Net Loss Per Share [Abstract]        
Antidilutive securities excluded from computation of net loss per share (in shares) 0 5,047 0 5,047
Former Rexahn Warrants [Member]        
Net Loss Per Share [Abstract]        
Antidilutive securities excluded from computation of net loss per share (in shares) 63,734 66,538 63,734 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 0 82