Note 12 - Income Taxes and Deferred Income Taxes - Reconciliation of Effective Income Tax Rate (Details) (Parentheticals) |
12 Months Ended | ||
|---|---|---|---|
May 31, 2026 |
May 31, 2025 |
May 31, 2024 |
|
| Tax Jurisdiction of Domicile [Extensible Enumeration] | Income Tax Jurisdiction, Domestic Federal [Member] | Income Tax Jurisdiction, Domestic Federal [Member] | Income Tax Jurisdiction, Domestic Federal [Member] |