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Equity Awards and Warrants - Private Placement of Shares of Common Stock and Warrants (Details)

v3.23.3
Equity Awards and Warrants - Private Placement of Shares of Common Stock and Warrants (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 12 Months Ended
May 31, 2023
May 30, 2023
Feb. 13, 2023
Jan. 12, 2023
Feb. 14, 2022
Jul. 31, 2023
Apr. 30, 2023
Jan. 31, 2023
Apr. 30, 2022
Aug. 31, 2023
Mar. 31, 2023
Jun. 30, 2022
May 31, 2023
May 31, 2022
Mar. 10, 2023
Feb. 28, 2023
Jan. 05, 2023
Dec. 31, 2022
Aug. 31, 2022
Aug. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share                     $ 0.50                  
Exercise of warrants for cash                         $ 400,000              
Exercise of warrants for cash, shares                         1,800,000              
Cashless exercise of warrants, shares                         100,000              
Cashless exercise of warrants, warrants                         300,000              
Shares issued during the period new issues shares     400,000                                  
Finance charges related to warrant issuance for surety bond backstop agreement                         $ 4,885,000 $ 6,585,000            
Common stock warrants to purchase shares                     71,100,000                  
Term of warrants               10 years     5 years                  
Placement agent fees and expenses                     $ 2,000,000.0 $ 2,800,000                
Number of warrants expiration extended                         3,800,000              
Proceeds from warrant exercises                         $ 439,000 $ 1,036,000            
Deemed dividends                         $ 600,000              
Common Stock, Shares Authorized 1,350,000,000                       1,350,000,000 1,350,000,000         1,350,000,000 1,000,000,000.0
CytoDyn Inc. | David F Welch                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Ownership percentage 5.00%                       5.00%              
Back Stop Warrant #1                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share                                   $ 0.10    
Common stock warrants to purchase shares                                   7,500,000    
Back Stop Warrant #2                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share                                   $ 0.10    
Common stock warrants to purchase shares 7,500,000                       7,500,000     7,500,000   7,500,000    
Accredited Investors Warrants [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share             $ 0.50                          
Common stock warrants to purchase shares             500,000                          
Term of warrants             5 years                          
Placement agent fees and expenses             $ 13,800                          
Warrants to Private Placement Agents                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Term of warrants             10 years                          
Former CEO                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation policy period                           18 months            
Shares issued during the period new issues shares                         380,704              
Former General Counsel                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Compensation policy period                           12 months            
Shares issued during the period new issues shares                         79,391              
Private Equity Offering                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share $ 0.306 $ 0.40                     $ 0.306              
Shares issued during the period new issues shares                         4,600,000              
Common stock warrants to purchase shares 5,500,000                       5,500,000              
Warrant covering common stock shares purchased, percentage 75.00% 50.00%                                    
Stock issued for private offerings                         $ 37,224,000 $ 46,511,000            
Incremental fair value of warrants                         4,200,000              
Debt issuance costs                         $ 9,700,000              
Accredited Investors                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Shares issued during the period new issues shares             500,000         85,400,000   34,600,000            
Common stock warrants to purchase shares                     71,100,000                  
Stock issued for private offerings             $ 100,000       $ 14,400,000 $ 18,900,000                
Proceeds, net of issuance costs                       $ 7,700,000                
Private Warrant Exchange                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share $ 1.00                       $ 1.00              
Shares issued during the period new issues shares                         500,000              
Placement agent fees and expenses                         $ 2,100,000              
Incremental fair value of warrants                         $ 100,000              
Exercise of warrants, net of offering costs (in shares)                         9,700,000              
Shares issued on warrant inducement                         8,400,000              
Proceeds from warrant exercises                         $ 2,100,000              
Deemed dividends                         500,000              
Private Warrant Exchange | Cyrus Arman                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share     $ 0.50                                  
Shares issued during the period new issues shares     400,000                                  
Common stock warrants to purchase shares     1                                  
Number of shares per warrant     1                                  
Proceeds from Issuance of Common Stock     $ 100,000                                  
Number of shares per unit     1                                  
Allotment to placement agent                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share               $ 0.23       $ 0.255                
Common stock warrants to purchase shares               10,700,000       19,400,000                
Term of warrants                       10 years                
Warrant covering common stock shares purchased, percentage               15.00%     12.00% 13.00%                
Placement agent fees and expenses                     $ 25,000.0 $ 50,000                
Allotment to placement agent | Accredited Investors Warrants [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Warrant covering common stock shares purchased, percentage             12.00%                          
Allotment to placement agent | Warrants to Private Placement Agents                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share             $ 0.23                          
Common stock warrants to purchase shares             75,000.0                          
Warrant covering common stock shares purchased, percentage             15.00%                          
Second Private Placement                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share                       $ 0.306                
Exercise price of stock warrant combo, per share       $ 0.23               $ 0.255                
Common stock warrants to purchase shares                       64,000,000.0                
Term of warrants                       5 years                
Number of common shares in a fixed combination issue of shares               1       1                
Number of warrants in a fixed combination issue of securities               1       1                
Warrant exercise price percentage of final unit price                       120.00%                
Closing share price (as percentage)       90.00%                                
Surety Bond Backstop Agreement                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Finance charges related to warrant issuance for surety bond backstop agreement                         4,900,000              
Interest rate         10.00%                              
Period of Indemnification, Payment by Indemnitors         90 days                              
Indemnification Fee Payment Ratio         1.50%                              
Amount of cash collateral to be relieved of amount currently pledged                             $ 1,400,000 $ 5,100,000        
Restricted Cash $ 6,500,000                       $ 6,500,000              
Surety Bond Backstop Agreement | Four Good Warrants                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share $ 0.10                       $ 0.10              
Term of warrants 5 years                       5 years              
Initial Warrant                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Common stock warrants to purchase shares         15,000,000.0                              
Make-Whole Warrant                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Common stock warrants to purchase shares         15,000,000.0                              
Four Good Warrants                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Finance charges related to warrant issuance for surety bond backstop agreement                           $ 6,600,000            
Warrant Exchange Agreements [Member] | Accredited Investors Warrants [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Warrant exercises (in shares)                         3,400,000              
Shares issued on warrant inducement                         600,000              
Proceeds from warrant exercises                         $ 700,000              
Restricted Cash $ 100,000                       $ 100,000              
Maximum                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share $ 0.75                       $ 0.75              
Cashless exercise of warrants, exercise price 0.50                       0.50              
Maximum | Private Equity Offering                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share 0.255                       0.255              
Maximum | Warrant Exchange Agreements [Member] | Accredited Investors Warrants [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share 0.75                       0.75              
Minimum                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share 0.10                       0.10              
Cashless exercise of warrants, exercise price 0.26                       0.26              
Minimum | Private Equity Offering                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share 0.40                       0.40              
Minimum | Surety Bond Backstop Agreement                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Amount of cash collateral to be relieved of amount currently pledged                                 $ 1,500,000      
Minimum | Warrant Exchange Agreements [Member] | Accredited Investors Warrants [Member]                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share $ 0.50                       $ 0.50              
2012 Equity Incentive Plan | Executives                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Percent of salary in lieu of cash, net of payroll deductions and withholding taxes                 25.00%                      
Shares issued                         522,382 317,441            
2012 Equity Incentive Plan | Consultants                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Stocks issued for severance payment                         1,617,760 128,001            
Subsequent Event                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Placement agent fees and expenses                   $ 400,000                    
Subsequent Event | Accredited Investors                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Shares issued during the period new issues shares                   14,700,000                    
Stock issued for private offerings                   $ 2,600,000                    
Subsequent Event | Allotment to placement agent                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of share           $ 0.20                            
Common stock warrants to purchase shares           2,200,000                            
Term of warrants           10 years                            
Warrant covering common stock shares purchased, percentage           15.00%       12.00%                    
Placement agent fees and expenses                   $ 5,000.0                    
Subsequent Event | Second Private Placement                                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                        
Exercise price of stock warrant combo, per share           $ 0.20                            
Closing share price (as percentage)           90.00%