Note 17 - Fair Values of Financial Instruments - Reconciliation for Assets Measured at Fair Value on Recurring Basis Using significant Unobservable Inputs (Details) (Parentheticals) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent |