Annual report [Section 13 and 15(d), not S-K Item 405]

Equity Incentive Plan - Stock options (Details)

v3.25.2
Equity Incentive Plan - Stock options (Details) - Employee Stock Option - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
May 31, 2025
May 31, 2024
May 31, 2023
Number of shares      
Options outstanding at the beginning of the period 25,849 19,823  
Granted 13,025 14,251  
Exercised (500)    
Forfeited, expired, and cancelled (50) (8,225)  
Options outstanding at the end of the period 38,324 25,849 19,823
Options outstanding and exercisable (in shares) 28,594    
Weighted average exercise price      
Options outstanding at the beginning of the period (in dollars per share) $ 0.6 $ 0.99  
Granted (in dollars per share) 0.17 0.21  
Exercised (in dollars per share) 0.21    
Forfeited, expired, and cancelled (in dollars per share) 0.66 0.87  
Options outstanding at the end of the period (in dollars per share) 0.46 $ 0.6 $ 0.99
Options outstanding and exercisable (in dollars per share) $ 0.54    
Additional Information      
Weighted average remaining contractual life in years 7 years 7 months 24 days 7 years 9 months 7 days 7 years 10 months 13 days
Weighted average remaining contractual life in years exercisable 7 years 2 months 23 days    
Aggregate intrinsic value in exercised $ 72    
Aggregate intrinsic value in outstanding 4,039    
Aggregate intrinsic value in outstanding and exercisable $ 2,653