General form for registration of securities under the Securities Act of 1933

Equity Incentive Plan - PSU activity (Details)

v3.26.1
Equity Incentive Plan - PSU activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
1 Months Ended 9 Months Ended 12 Months Ended
May 31, 2025
Feb. 28, 2026
May 31, 2025
May 31, 2024
May 31, 2023
Weighted average grant date fair value          
Expected to be recognized over weighted-average period     1 year 6 months    
RSU and PSU          
Number of shares          
Beginning shares   3,500   1,293  
Granted (in shares)     3,500    
Forfeited (in shares)       (1,293)  
Ending shares 3,500   3,500   1,293
Weighted average grant date fair value          
Beginning   $ 0.41   $ 0.58  
Grant     $ 0.41    
Forfeited       $ 0.58  
Ending $ 0.41   $ 0.41   $ 0.58
Weighted average remaining contractual life in years     1 year 9 months   9 months 21 days
Performance target level percentage for non-vested equity-based payment instruments     100.00%    
Unrecognized compensation expense $ 1.4   $ 1.4    
Expected to be recognized over weighted-average period     1 year 9 months    
PSU          
Number of shares          
Beginning shares   3,500      
Granted (in shares)     3,500    
Ending shares 3,500 3,500 3,500    
Weighted average grant date fair value          
Beginning   $ 0.41      
Ending $ 0.41 $ 0.41 $ 0.41    
Weighted average remaining contractual life in years   1 year 1 year 9 months    
Performance target level percentage for non-vested equity-based payment instruments   100.00%      
Unrecognized compensation expense   $ 1.4      
Expected to be recognized over weighted-average period   1 year      
PSU | Maximum          
Weighted average grant date fair value          
Performance target level percentage for non-vested equity-based payment instruments 100.00% 100.00%      
PSU | Minimum          
Weighted average grant date fair value          
Performance target level percentage for non-vested equity-based payment instruments 0.00% 0.00%      
Stock Options and Warrants          
Weighted average grant date fair value          
Unrecognized compensation expense $ 1.7   $ 1.7    
Vested during the period, grant date fair value     $ 1.3 $ 3.3