Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.1
Equity Awards and Warrants - Private Placement of Shares of Common Stock and Warrants (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 13, 2023
Jan. 12, 2023
Aug. 31, 2022
Aug. 30, 2022
Feb. 14, 2022
Mar. 31, 2023
Jan. 31, 2023
Nov. 30, 2022
Apr. 30, 2022
Mar. 31, 2023
Feb. 28, 2023
Aug. 31, 2022
Jun. 30, 2022
Feb. 28, 2022
 [1]
Nov. 30, 2021
 [1]
Aug. 31, 2021
 [1]
Feb. 28, 2023
Feb. 28, 2022
 [1]
May 31, 2022
Mar. 10, 2023
Jan. 05, 2023
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Exercise price of share           $ 0.50       $ 0.50                        
Exercise of warrants for cash                                 $ 300,000          
Exercise of warrants for cash, shares                                 500,000          
Cashless exercise of warrants, shares                                 200,000          
Cashless exercise of warrants, warrants                                 300,000          
Shares issued during the period new issues shares 400,000   4,600,000               500,000                      
Finance charges related to warrant issuance for surety bond backstop agreement                     $ 4,885,000 $ 8,601,000   $ 6,585,000                
Common stock warrants to purchase shares     5,500,000     71,100,000       71,100,000   5,500,000                    
Term of warrants           5 years 10 years     5 years                        
Warrant covering common stock shares purchased, percentage     75.00% 50.00%                                    
Placement agent fees and expenses                   $ 2,000,000.0     $ 2,800,000                  
Stock issued for private offerings                     18,045,000     $ 3,552,000                
Incremental fair value of warrants     $ 4,200,000               $ 100,000                      
Number of warrants expiration extended                                 3,800,000          
Proceeds from warrant exercises                                 $ 264,000 $ 1,036,000        
Deemed dividends                                 $ 500,000          
Common Stock, Shares Authorized     1,350,000,000 1,000,000,000.0             1,350,000,000 1,350,000,000         1,350,000,000   1,350,000,000      
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
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          
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                          
Private Equity Offering                                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Stock issued for private offerings                       $ 17,544,000     $ 27,307,000 $ 2,872,000            
Accredited Investors                                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Shares issued during the period new issues shares                         85,400,000           34,600,000      
Common stock warrants to purchase shares           71.1       71.1                        
Stock issued for private offerings                   $ 14,400,000     $ 18,900,000                  
Proceeds, net of issuance costs                   $ 13,300,000     $ 7,700,000                  
Private Warrant Exchange [Member]                                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Exercise price of share               $ 1.00                            
Placement agent fees and expenses               $ 2,100,000                            
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 [Member] | 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       $ 0.40     $ 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     $ 50,000                  
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                  
Shares issued during the period new issues shares                   65.6                        
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 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                     $ 5,100,000           5,100,000          
Amount of cash collateral to be relieved of amount currently pledged by Indemnity in support of Surety Bond             $ 5,000,000.0                              
Restricted Cash                     $ 5,100,000           $ 5,100,000          
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     $ 0.255               $ 0.75 $ 0.255         $ 0.75          
Cashless exercise of warrants, exercise price                     0.50           0.50          
Maximum | Allotment to placement agent                                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Exercise price of share     $ 0.306                 $ 0.306                    
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                     0.45           0.45          
Cashless exercise of warrants, exercise price                     0.26           0.26          
Warrant covering common stock shares purchased, percentage                       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          
Subsequent Event                                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Stock issued for private offerings           $ 1,100,000                                
Subsequent Event | 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                                       $ 1,400,000    
[1] See Note 2, Summary of Significant Accounting Policies—Revision and Restatement of Financial Statements.