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Equity - Schedule of Assumptions (Details) - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Class of Warrant or Right [Line Items]      
Strike price     $ 11.00
Volatility rate 80.00% 80.00% 80.00%
Risk-free rate of interest, minimum 0.79% 0.79%  
Risk-free rate, maximum 1.24% 0.79%  
Dividend yield 0.00% 0.00%  
Legacy NeuroRx Warrants      
Class of Warrant or Right [Line Items]      
Strike price $ 24.25 $ 3.19  
Volatility rate 80.00% 80.00%  
Risk-free rate of interest, minimum 0.03% 0.19%  
Risk-free rate, maximum 0.32% 0.28%  
Dividend yield 0.00% 0.00%  
Substitute Warrants      
Class of Warrant or Right [Line Items]      
Volatility rate 80.00%    
Risk-free rate of interest, minimum 0.03%    
Risk-free rate, maximum 0.32%    
Common stock warrant [Member]      
Class of Warrant or Right [Line Items]      
Strike price   $ 15.25 $ 11.00
Volatility rate 80.00%    
Risk-free rate     2.40%
Risk-free rate of interest, minimum 0.03%    
Risk-free rate, maximum 0.32%    
Expected term (years)     5 years
Dividend yield   0.00% 0.00%
Minimum [Member]      
Class of Warrant or Right [Line Items]      
Strike price $ 11.69 $ 2.22  
Risk-free rate of interest, minimum   0.30% 1.54%
Expected term (years) 5 years 6 months 4 years 8 months 12 days 6 years
Minimum [Member] | Legacy NeuroRx Warrants      
Class of Warrant or Right [Line Items]      
Expected term (years) 6 months 25 days 3 years  
Minimum [Member] | Substitute Warrants      
Class of Warrant or Right [Line Items]      
Strike price $ 1.53    
Expected term (years) 6 months 25 days    
Minimum [Member] | Common stock warrant [Member]      
Class of Warrant or Right [Line Items]      
Strike price $ 7.58    
Risk-free rate   0.19%  
Expected term (years) 6 months 25 days 3 years  
Maximum [Member]      
Class of Warrant or Right [Line Items]      
Strike price $ 23.41 $ 3.07  
Risk-free rate of interest, minimum   0.49% 1.73%
Expected term (years) 6 years 6 months 5 years 10 months 24 days 6 years 6 months
Maximum [Member] | Legacy NeuroRx Warrants      
Class of Warrant or Right [Line Items]      
Expected term (years) 4 years 5 months 1 day 5 years  
Maximum [Member] | Substitute Warrants      
Class of Warrant or Right [Line Items]      
Strike price $ 3.19    
Expected term (years) 4 years 5 months 1 day    
Maximum [Member] | Common stock warrant [Member]      
Class of Warrant or Right [Line Items]      
Strike price $ 15.84    
Risk-free rate   0.28%  
Expected term (years) 4 years 5 months 1 day 5 years