Note 5 - Mortgage Operations - Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement (Details) |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Constant prepayment rate | 6.44% | 7.53% |
| Discount rate | 9.51% | 9.50% |
| Weighted average life (years) (Year) | 7 years 6 months 18 days | 7 years 2 months 26 days |