Quarterly report pursuant to Section 13 or 15(d)

Pre-Merger Financing (Details)

v3.22.1
Pre-Merger Financing (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Jun. 29, 2020
USD ($)
Mar. 31, 2022
USD ($)
Director
$ / shares
shares
Mar. 31, 2021
USD ($)
Nov. 19, 2020
$ / shares
shares
Nov. 05, 2020
shares
Pre-Merger Financing [Abstract]          
Fair value change of warrant liability and premium conversion derivatives | $   $ 0 $ (33,829)    
Rexahn [Member]          
Pre-Merger Financing [Abstract]          
Warrants outstanding (in shares) | shares   66,538     231,433
Securities Purchase Agreement [Member]          
Pre-Merger Financing [Abstract]          
Number of directors | Director   5      
Securities Purchase Agreement [Member] | Rexahn [Member]          
Pre-Merger Financing [Abstract]          
Number of directors | Director   1      
Securities Purchase Agreement [Member] | Investors [Member]          
Pre-Merger Financing [Abstract]          
Total investment | $ $ 21,150        
Securities Purchase Agreement [Member] | Directors [Member]          
Pre-Merger Financing [Abstract]          
Total investment | $ $ 300        
Series A Warrants [Member]          
Pre-Merger Financing [Abstract]          
Exercise price (in dollars per share) | $ / shares       $ 4.4795  
Exercisable term   5 years      
Warrant issued (in shares) | shares       5,665,838  
Series A Warrants [Member] | Risk-Free Interest Rate [Member]          
Pre-Merger Financing [Abstract]          
Percentage of measurement input   0.004      
Series A Warrants [Member] | Expected Volatility [Member]          
Pre-Merger Financing [Abstract]          
Percentage of measurement input   0.866      
Series A Warrants [Member] | Expected Term [Member]          
Pre-Merger Financing [Abstract]          
Expected life   4 years 9 months 18 days      
Series A Warrants [Member] | Expected Dividend Yield Rate [Member]          
Pre-Merger Financing [Abstract]          
Percentage of measurement input   0      
Series A Warrants [Member] | Waiver Agreements [Member]          
Pre-Merger Financing [Abstract]          
Fair value change of warrant liability and premium conversion derivatives | $   $ 33,800      
Series B Warrants [Member]          
Pre-Merger Financing [Abstract]          
Exercise price (in dollars per share) | $ / shares   $ 0.0001      
Remaining issuable shares (in shares) | shares   0      
Warrants outstanding (in shares) | shares   78,700