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

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

v3.26.1
Private Placements of Common Stock and Warrants - Warrants Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Private Placements of Common Stock and Warrants      
Warrants outstanding beginning of period 213,128 361,445  
Granted 93,941 0  
Exercised (597) (140,106)  
Forfeited, expired, and cancelled (105) (8,211)  
Warrants outstanding at end of period 306,367 213,128 361,445
Warrants outstanding and exercisable 306,367    
Outstanding at the beginning of the year (in dollars per share) $ 0.27 $ 0.34  
Granted (in dollars per share) 0.25 0  
Exercised (in dollars per share) 0.09 0.09  
Forfeited, expired, and cancelled (in dollars per share) 3.07 0.56  
Outstanding at the end of the year (in dollars per share) 0.26 $ 0.27 $ 0.34
Warrants outstanding and exercisable (in dollars per share) $ 0.26    
Weighted average remaining contractual life in years   3 years 8 months 15 days 4 years 2 months 15 days
Weighted Average Remaining Contractual Term outstanding 3 years 6 months 25 days    
Weighted average remaining contractual life in years outstanding and exercisable 3 years 6 months 25 days    
Aggregate intrinsic value outstanding of beginning $ 27,923 $ 2,697  
Aggregate intrinsic value exercised 129 7,615  
Aggregate intrinsic value outstanding of end period 25,421 $ 27,923 $ 2,697
Aggregate intrinsic value outstanding and exercisable $ 25,421