Income Taxes - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2025 |
May 31, 2024 |
May 31, 2023 |
|
| Income Tax Disclosure [Abstract] | |||
| Tax net operating losses | $ 399.6 | $ 284.8 | $ 114.8 |
| Operating loss carryforwards, not subject to expiration | 346.5 | ||
| Increase in valuation allowance | $ 18.9 | $ 31.3 | |