Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plan - Stock Options and Other Equity Awards (Details)

v3.24.2.u1
Equity Incentive Plan - Stock Options and Other Equity Awards (Details) - $ / shares
shares in Thousands
12 Months Ended
May 31, 2024
May 31, 2023
Share-based Compensation    
Options outstanding, vested 19,700 12,000
Options outstanding, nonvested 6,100 7,800
Common Stock    
Share-based Compensation    
Warrant exercises (in shares) 3,000 1,898
Shares issued during the period new issues shares 75,622 157,390
Management, Employees And Consultants    
Share-based Compensation    
Stock option granted, Shares 14,300  
Management, Employees And Consultants | Maximum    
Share-based Compensation    
Stock option granted, exercise price $ 0.26  
Stock options grant date fair value 0.17  
Management, Employees And Consultants | Minimum    
Share-based Compensation    
Stock option granted, exercise price 0.21  
Stock options grant date fair value 0.15  
Employee Stock Option [Member]    
Share-based Compensation    
Stock option granted, exercise price $ 0.21 $ 0.41