Equity Awards - Expense and unrecognized (Details) - USD ($) $ in Thousands, shares in Millions |
3 Months Ended | ||||
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Aug. 31, 2022 |
Aug. 31, 2021 |
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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 | |||
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