Note 2 - Investment Securities (Tables)
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6 Months Ended |
Jun. 30, 2025 |
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| Notes Tables |
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| Marketable Securities [Table Text Block] |
| | | June 30, 2025 | | | December 31, 2024 | |
| | | | | | | Gross | | | | | | | | | | | | | | | Gross | | | | | | | | | |
| | | Amortized | | | Unrealized | | | | | | | Fair | | | Amortized | | | Unrealized | | | | | | | Fair | |
| | | Cost | | | Gains | | | (Losses) | | | ACL | | | Value | | | Cost | | | Gains | | | (Losses) | | | ACL | | | Value | |
| | | (In Thousands) | | | | | |
| Available-for-Sale: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| U.S. government and agency obligations | | $ | 4,587 | | | $ | 77 | | | $ | (115 | ) | | $ | - | | | $ | 4,549 | | | $ | 5,298 | | | $ | 85 | | | $ | (188 | ) | | $ | - | | | $ | 5,195 | |
| U.S. treasury obligations | | | 48,632 | | | | - | | | | (4,210 | ) | | | - | | | | 44,422 | | | | 52,592 | | | | - | | | | (5,679 | ) | | | - | | | | 46,913 | |
| Municipal obligations | | | 128,187 | | | | 1 | | | | (13,366 | ) | | | - | | | | 114,822 | | | | 131,109 | | | | 1 | | | | (13,233 | ) | | | - | | | | 117,877 | |
| Corporate obligations | | | 3,250 | | | | - | | | | (102 | ) | | | - | | | | 3,148 | | | | 4,249 | | | | - | | | | (87 | ) | | | - | | | | 4,162 | |
| Mortgage-backed securities | | | 28,785 | | | | 120 | | | | (1,199 | ) | | | - | | | | 27,706 | | | | 29,867 | | | | 21 | | | | (1,653 | ) | | | - | | | | 28,235 | |
| Collateralized mortgage obligations | | | 88,693 | | | | 53 | | | | (5,544 | ) | | | - | | | | 83,202 | | | | 89,313 | | | | 11 | | | | (6,701 | ) | | | - | | | | 82,623 | |
| Asset-backed securities | | | 7,123 | | | | 51 | | | | - | | | | - | | | | 7,174 | | | | 7,511 | | | | 83 | | | | (9 | ) | | | - | | | | 7,585 | |
| Total | | $ | 309,257 | | | $ | 302 | | | $ | (24,536 | ) | | $ | - | | | $ | 285,023 | | | $ | 319,939 | | | $ | 201 | | | $ | (27,550 | ) | | $ | - | | | $ | 292,590 | |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | June 30, 2025 | |
| | | Amortized | | | Fair | |
| | | Cost | | | Value | |
| | | (In Thousands) | |
| Due in one year or less | | $ | 2,475 | | | $ | 2,457 | |
| Due from one to five years | | | 38,189 | | | | 35,842 | |
| Due from five to ten years | | | 83,389 | | | | 73,993 | |
| Due after ten years | | | 67,726 | | | | 61,823 | |
| | | | 191,779 | | | | 174,115 | |
| Mortgage-backed securities | | | 28,785 | | | | 27,706 | |
| Collateralized mortgage obligations | | | 88,693 | | | | 83,202 | |
| Total | | $ | 309,257 | | | $ | 285,023 | |
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| Gain (Loss) on Securities [Table Text Block] |
| | | June 30, 2025 | |
| | | Less Than 12 Months | | | 12 Months or Longer | |
| | | | | | | Gross | | | | | | | Gross | |
| | | Fair | | | Unrealized | | | Fair | | | Unrealized | |
| | | Value | | | Losses | | | Value | | | Losses | |
| | | (In Thousands) | |
| U.S. government and agency obligations | | $ | - | | | $ | - | | | $ | 1,815 | | | $ | (115 | ) |
| U.S. treasury obligations | | | - | | | | - | | | | 44,422 | | | | (4,210 | ) |
| Municipal obligations | | | 12,079 | | | | (725 | ) | | | 102,187 | | | | (12,641 | ) |
| Corporate obligations | | | - | | | | - | | | | 3,148 | | | | (102 | ) |
| Mortgage-backed securities and collateralized mortgage obligations | | | 10,229 | | | | (106 | ) | | | 78,931 | | | | (6,637 | ) |
| Asset-backed securities | | | - | | | | - | | | | 200 | | | | - | |
| Total | | $ | 22,308 | | | $ | (831 | ) | | $ | 230,703 | | | $ | (23,705 | ) |
| | | December 31, 2024 | |
| | | Less Than 12 Months | | | 12 Months or Longer | |
| | | | | | | Gross | | | | | | | Gross | |
| | | Fair | | | Unrealized | | | Fair | | | Unrealized | |
| | | Value | | | Losses | | | Value | | | Losses | |
| | | (In Thousands) | |
| U.S. government and agency obligations | | $ | - | | | $ | - | | | $ | 1,749 | | | $ | (188 | ) |
| U.S. treasury obligations | | | - | | | | - | | | | 46,914 | | | | (5,679 | ) |
| Municipal obligations | | | 14,678 | | | | (261 | ) | | | 102,521 | | | | (12,972 | ) |
| Corporate obligations | | | - | | | | - | | | | 4,163 | | | | (87 | ) |
| Mortgage-backed securities and collateralized mortgage obligations | | | 10,984 | | | | (188 | ) | | | 85,392 | | | | (8,166 | ) |
| Asset-backed securities | | | 1,993 | | | | (9 | ) | | | - | | | | - | |
| Total | | $ | 27,655 | | | $ | (458 | ) | | $ | 240,739 | | | $ | (27,092 | ) |
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