Quarterly report pursuant to Section 13 or 15(d)

Equity Awards - Expense and unrecognized (Details)

v3.22.2.2
Equity Awards - Expense and unrecognized (Details) - USD ($)
$ in Thousands, shares in Millions
3 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense $ 1,341 $ 2,597 [1]
Common stock warrants to purchase shares 5.5  
Surety Bond Backstop Agreement    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock based compensation $ 5,300 0
Equity Instruments | General and Administrative Expenses    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense $ 1,300 $ 2,600
[1] See Note 2, Summary of Significant Accounting Policies.