Note 4 - Allowance for Credit Losses (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 14,943 | $ 15,186 | $ 14,719 | $ 16,400 | |
| Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default | $ 0 | 0 | |||
| Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | 23 | 105 | |||
| Off-Balance-Sheet, Credit Loss, Liability | 650 | $ 591 | |||
| TDR Loans [Member] | |||||
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 0 | 0 | |||
| Collateral Pledged [Member] | |||||
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 0 | $ 0 | |||