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

Equity Awards and Warrants - Expense and unrecognized (Details)

v3.23.3
Equity Awards and Warrants - Expense and unrecognized (Details) - USD ($)
$ in Thousands, shares in Millions
12 Months Ended
May 31, 2023
May 31, 2022
Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 4,275 $ 6,239  
Common stock warrants to purchase shares     71.1
Stock Options And Warrants [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vested during the period, grant date fair value 4,900 3,900  
Unrecognized compensation expense $ 3,000    
Weighted average period over which unrecognized compensation expense is expected to be recognized 1 year 1 month 6 days    
Equity Instruments | General and Administrative Expenses      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 4,300 $ 6,200