Annual report pursuant to Section 13 and 15(d)

Equity Awards and Warrants - Warrants Activity (Details)

v3.23.2
Equity Awards and Warrants - Warrants Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
May 31, 2023
May 31, 2022
May 31, 2021
Equity Awards and Warrants      
Warrants outstanding beginning of period 73,248 42,934  
Granted 201,771 38,220  
Exercised (6,207) (5,167)  
Forfeited, expired, and cancelled (8,902) (2,740)  
Warrants outstanding at end of period 259,910 73,248 42,934
Warrants outstanding and exercisable 259,910    
Outstanding at the beginning of the year (in dollars per share) $ 0.59 $ 0.68  
Granted 0.33 0.52  
Exercised 0.63 0.70  
Forfeited, expired, and cancelled 0.75 0.73  
Outstanding at the end of the year (in dollars per share) 0.37 $ 0.59 $ 0.68
Warrants outstanding and exercisable $ 0.37    
Weighted average remaining contractual life in years 4 years 6 months 25 days 3 years 2 months 4 days 2 years 10 months 20 days
Weighted average remaining contractual life in years exercisable 4 years 6 months 25 days    
Aggregate intrinsic value outstanding of beginning $ 352 $ 52,671  
Aggregate intrinsic value exercised 758 5,514  
Aggregate intrinsic value outstanding of end period 7,276 $ 352 $ 52,671
Aggregate intrinsic value exercisable $ 7,276