Post-effective amendment to a registration statement that is not immediately effective upon filing

Warrants - Warrant activity (Details)

v3.25.3
Warrants - Warrant activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Aug. 31, 2025
May 31, 2025
May 31, 2024
May 31, 2023
Warrants        
Warrants outstanding beginning of period 213,128 361,445 259,910  
Granted     115,582  
Exercised (33) (140,106) (3,000)  
Forfeited, expired, and cancelled (105) (8,211) (11,047)  
Warrants outstanding at end of period 212,990 213,128 361,445 259,910
Warrants outstanding and exercisable 212,990 213,128    
Outstanding at the beginning of the year (in dollars per share) $ 0.27 $ 0.34 $ 0.37  
Granted (in dollars per share)     0.28  
Exercised (in dollars per share) 0.09 0.09 0.1  
Forfeited, expired, and cancelled (in dollars per share) 3.07 0.56 0.63  
Outstanding at the end of the year (in dollars per share) 0.26 0.27 $ 0.34 $ 0.37
Warrants outstanding and exercisable (in dollars per share) $ 0.26 $ 0.27    
Weighted average remaining contractual life in years 3 years 5 months 15 days 3 years 8 months 15 days 4 years 2 months 15 days 4 years 6 months 25 days
Weighted average remaining contractual life in years outstanding and exercisable 3 years 5 months 15 days 3 years 8 months 15 days    
Aggregate intrinsic value outstanding of beginning $ 27,923 $ 2,697 $ 7,276  
Aggregate intrinsic value exercised 7 7,615 480  
Aggregate intrinsic value outstanding of end period 18,990 27,923 $ 2,697 $ 7,276
Aggregate intrinsic value outstanding and exercisable $ 18,990 $ 27,923