Note 6 - Fair Values of Assets and Liabilities (Details Textual) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Sep. 11, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Fair Value, Option, Credit Risk, Gains (Losses) on Assets | $ 14.0 | $ 7.5 | |
| Aggregate Unpaid Principal Balance of Loans Receivable at Fair Value | $ 6,404.0 | $ 2,788.0 | |
| Mercury Financial LLC [Member] | |||
| Business Combination, Earnout Payment Period (Year) | 3 years | ||
| Business Combination, Earnout Percent of Receivables Less than Charge-off Levels | 75.00% | ||