Quarterly report [Sections 13 or 15(d)]

Equity Incentive Plan - Stock options (Details)

v3.26.1
Equity Incentive Plan - Stock options (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
May 31, 2025
Additional Information      
Stock options grant date fair value (in dollar per share) $ 0.26 $ 0.12  
Stock Options      
Number of shares      
Options outstanding at the beginning of the period 38,324    
Granted 925    
Exercised (100)    
Forfeited, expired, and cancelled (905)    
Options outstanding at the end of the period 38,244   38,324
Options outstanding and exercisable (in shares) 31,322    
Weighted average exercise price      
Options outstanding at the beginning of the period (in dollars per share) $ 0.46    
Granted (in dollars per share) 0.29    
Exercised (in dollars per share) 0.21    
Forfeited, expired, and cancelled (in dollars per share) 1.14    
Options outstanding at the end of the period (in dollars per share) 0.44   $ 0.46
Options outstanding and exercisable (in dollars per share) $ 0.44    
Additional Information      
Weighted average remaining contractual life in years 6 years 11 months 23 days   7 years 7 months 24 days
Weighted average remaining contractual life in years exercisable 6 years 7 months 28 days    
Aggregate intrinsic value in exercised $ 6    
Aggregate intrinsic value in outstanding 1,794   $ 4,039
Aggregate intrinsic value in outstanding and exercisable $ 1,320    
Stock option granted, Shares 900 11,700  
Stock Options | Tranche One      
Additional Information      
Stock option vested, Shares 600 5,700  
Award vesting period 4 years 4 years  
Stock Options | Tranche Two      
Additional Information      
Stock option vested, Shares 300 6,000  
Award vesting period 1 year 1 year