Quarterly report pursuant to Section 13 or 15(d)

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

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Net loss per share, Anti-dilutive Securities Excluded from Computation of Net Income (Loss) per Share (Details) - shares
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Series A and RDO Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 7,204,299 7,204,299
Stock Options [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 4,827,433 3,601,427
Restricted Stock Units [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 993,112 291,584
Former Rexahn Warrants [Member]    
Net Loss Per Share [Abstract]    
Antidilutive securities excluded from computation of net loss per share (in shares) 0 60,713