Annual report pursuant to Section 13 and 15(d)

Merger, Former Rexahn Warrants and Stock Options (Details)

v3.20.4
Merger, Former Rexahn Warrants and Stock Options (Details) - Rexahn [Member] - $ / shares
12 Months Ended
Dec. 31, 2020
Nov. 05, 2020
Former Rexahn Warrants and Stock Options [Abstract]    
Number of warrants outstanding (in shares) 66,538 231,433
Average remaining contractual life 2 years 10 months 24 days  
Number of shares outstanding (in shares) 123 993
Minimum [Member]    
Former Rexahn Warrants and Stock Options [Abstract]    
Exercise price (in dollars per share) $ 38.40  
Maximum [Member]    
Former Rexahn Warrants and Stock Options [Abstract]    
Exercise price (in dollars per share) $ 198.00