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Equity - Substitute Warrants (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
May 24, 2021
$ / shares
shares
May 23, 2021
Jun. 30, 2022
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
$ / shares
Jun. 30, 2021
USD ($)
Dec. 31, 2021
$ / shares
Class of Stock [Line Items]              
Warrants, exercise price per share     $ 6.29   $ 6.29   $ 9.09
Unamortized compensation costs | $     $ 28,500   $ 28,500    
General and administrative | $     6,642 $ 12,458 16,864 $ 14,558  
Merger agreement              
Class of Stock [Line Items]              
Exchange Ratio 3.16 4.96          
Substitute Warrants              
Class of Stock [Line Items]              
Warrants exercised | shares 4,909,066            
Warrants, exercise price per share $ 2.45            
Volatility rate             80.00%
Risk-free rate, minimum             0.03%
Risk-free rate, maximum             0.32%
Unamortized compensation costs | $     $ 23,800   $ 23,800    
General and administrative | $       $ 2,300      
Substitute Warrants | Minimum              
Class of Stock [Line Items]              
Strike price             $ 1.53
Expected term             6 months 25 days
Substitute Warrants | Maximum              
Class of Stock [Line Items]              
Strike price             $ 3.19
Expected term             3 years 8 months 8 days
Legacy NeuroRx Warrants              
Class of Stock [Line Items]              
Volatility rate             80.00%
Risk-free rate, minimum             0.03%
Risk-free rate, maximum             0.32%
Legacy NeuroRx Warrants | Minimum              
Class of Stock [Line Items]              
Strike price             $ 7.58
Expected term             6 months 25 days
Legacy NeuroRx Warrants | Maximum              
Class of Stock [Line Items]              
Strike price             $ 15.84
Expected term             3 years 8 months 8 days