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

Private Placements of Common Stock and Warrants - Warrants Activity (Details)

v3.25.2
Private Placements of Common Stock and Warrants - Warrants Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
May 31, 2025
May 31, 2024
May 31, 2023
Private Placements of Common Stock and Warrants      
Warrants outstanding beginning of period 361,445 259,910  
Granted   115,582  
Exercised (140,106) (3,000)  
Forfeited, expired, and cancelled (8,211) (11,047)  
Warrants outstanding at end of period 213,128 361,445 259,910
Warrants outstanding and exercisable 213,128    
Outstanding at the beginning of the year (in dollars per share) $ 0.34 $ 0.37  
Granted (in dollars per share)   0.28  
Exercised (in dollars per share) 0.09 0.1  
Forfeited, expired, and cancelled (in dollars per share) 0.56 0.63  
Outstanding at the end of the year (in dollars per share) 0.27 $ 0.34 $ 0.37
Warrants outstanding and exercisable (in dollars per share) $ 0.27    
Weighted average remaining contractual life in years 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 8 months 15 days    
Aggregate intrinsic value outstanding of beginning $ 2,697 $ 7,276  
Aggregate intrinsic value exercised 7,615 480  
Aggregate intrinsic value outstanding of end period 27,923 $ 2,697 $ 7,276
Aggregate intrinsic value outstanding and exercisable $ 27,923