Note 4 - Allowance for Credit Losses on Loans (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
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| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 18,345,000 | [1] | $ 19,343,000 | $ 18,345,000 | [1] | $ 19,343,000 | $ 20,449,000 | [1] | ||
| Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | (296,000) | 8,640,000 | 7,474,000 | 9,879,000 | ||||||
| Unfunded Loan Commitment [Member] | ||||||||||
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 550,000 | 550,000 | $ 599,000 | |||||||
| Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | $ (64,000) | $ 99,000 | $ (49,000) | $ (170,000) | ||||||
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