Note 2 - Debt Securities (Tables)
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6 Months Ended |
Jun. 30, 2026 |
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| Notes Tables |
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| Debt Securities, Available-for-Sale [Table Text Block] |
| | | June 30, 2026 | |
| | | | | | | Gross | | | Gross | | | Estimated | |
| | | Amortized | | | Unrealized | | | Unrealized | | | Fair | |
| (In thousands) | | Cost | | | Gains | | | Losses | | | Value | |
| Available-for-sale: | | | | | | | | | | | | | | | | |
| U.S. Treasury securities and obligations of U.S. government agencies | | $ | 424 | | | $ | - | | | $ | (21 | ) | | $ | 403 | |
| Commercial mortgage-backed securities | | | 16,025 | | | | - | | | | (172 | ) | | | 15,853 | |
| Residential mortgage-backed securities | | | 213,786 | | | | 114 | | | | (2,686 | ) | | | 211,214 | |
| U.S. states and political subdivisions | | | 4,712 | | | | 51 | | | | (37 | ) | | | 4,726 | |
| Total available-for-sale | | $ | 234,947 | | | $ | 165 | | | $ | (2,916 | ) | | $ | 232,196 | |
| | | December 31, 2025 | |
| | | | | | | Gross | | | Gross | | | Estimated | |
| | | Amortized | | | Unrealized | | | Unrealized | | | Fair | |
| (In thousands) | | Cost | | | Gains | | | Losses | | | Value | |
| Available-for-sale: | | | | | | | | | | | | | | | | |
| U.S. Treasury securities and obligations of U.S. government agencies | | $ | 478 | | | $ | - | | | $ | (20 | ) | | $ | 458 | |
| Commercial mortgage-backed securities | | | 5,454 | | | | 3 | | | | (27 | ) | | | 5,430 | |
| Residential mortgage-backed securities | | | 207,847 | | | | 340 | | | | (635 | ) | | | 207,552 | |
| U.S. states and political subdivisions | | | 4,709 | | | | 72 | | | | (61 | ) | | | 4,720 | |
| Total available-for-sale | | $ | 218,488 | | | $ | 415 | | | $ | (743 | ) | | $ | 218,160 | |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
| | | Less than 12 Months | | | 12 Months or More | | | Total | |
| | | | | | Unrealized | | | | | | Unrealized | | | | | | Unrealized | |
| June 30, 2026 | | Fair Value | | | Losses | | | Fair Value | | | Losses | | | Fair Value | | | Losses | |
| U.S. Treasury securities and obligations of U.S. government agencies | | $ | - | | | $ | - | | | $ | 403 | | | $ | (21 | ) | | $ | 403 | | | $ | (21 | ) |
| Commercial mortgage-backed securities | | | 15,854 | | | | (172 | ) | | | - | | | | - | | | | 15,854 | | | | (172 | ) |
| Residential mortgage-backed securities | | | 168,811 | | | | (2,461 | ) | | | 1,750 | | | | (225 | ) | | | 170,561 | | | | (2,686 | ) |
| U.S. states and political subdivisions | | | - | | | | - | | | | 896 | | | | (37 | ) | | | 896 | | | | (37 | ) |
| Total available-for-sale | | $ | 184,665 | | | $ | (2,633 | ) | | $ | 3,049 | | | $ | (283 | ) | | $ | 187,714 | | | $ | (2,916 | ) |
| | | Less than 12 Months | | | 12 Months or More | | | Total | |
| | | | | | Unrealized | | | | | | Unrealized | | | | | | Unrealized | |
| December 31, 2025 | | Fair Value | | | Losses | | | Fair Value | | | Losses | | | Fair Value | | | Losses | |
| U.S. Treasury securities and obligations of U.S. government agencies | | $ | - | | | $ | - | | | $ | 458 | | | $ | (20 | ) | | $ | 458 | | | $ | (20 | ) |
| Commercial mortgage-backed securities | | | 3,441 | | | | (20 | ) | | | 1,004 | | | | (7 | ) | | | 4,445 | | | | (27 | ) |
| Residential mortgage-backed securities | | | 103,636 | | | | (437 | ) | | | 1,798 | | | | (198 | ) | | | 105,434 | | | | (635 | ) |
| U.S. states and political subdivisions | | | 1,004 | | | | - | | | | 871 | | | | (61 | ) | | | 1,875 | | | | (61 | ) |
| Total available-for-sale | | $ | 108,081 | | | $ | (457 | ) | | $ | 4,131 | | | $ | (286 | ) | | $ | 112,212 | | | $ | (743 | ) |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | Available-for-sale | |
| (In thousands) | | | Amortized Cost | | | | Fair Value | |
| Due in one year or less | | $ | - | | | $ | - | |
| Due after one year through five years | | | - | | | | - | |
| Due after five years through 10 years | | | 424 | | | | 403 | |
| Due after 10 years | | | 4,712 | | | | 4,726 | |
| | | | 5,136 | | | | 5,129 | |
| Debt securities not due at a single maturity date: mortgage-backed securities | | | 229,811 | | | | 227,067 | |
| Total available-for-sale | | $ | 234,947 | | | $ | 232,196 | |
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