Note 2 - Securities (Tables)
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3 Months Ended |
Mar. 31, 2026 |
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| Notes Tables |
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| Schedule of Available-for-sale and Held-to-maturity Reconciliation [Table Text Block] |
| | | March 31, 2026 | |
| | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized (Losses) | | | Fair Value | | | Allowance for Credit Losses | |
| Securities available for sale: | | | | | | | | | | | | | | | | | | | | |
| U.S. Treasury securities | | $ | 37,613 | | | $ | — | | | $ | (478 | ) | | $ | 37,135 | | | $ | — | |
| U.S. agency and mortgage-backed securities | | | 131,120 | | | | 103 | | | | (8,805 | ) | | | 122,418 | | | | — | |
| Obligations of states and political subdivisions | | | 63,146 | | | | 16 | | | | (7,015 | ) | | | 56,147 | | | | — | |
| Corporate debt securities | | | 1,974 | | | | — | | | | (19 | ) | | | 1,955 | | | | | |
| Total securities available for sale | | $ | 233,853 | | | $ | 119 | | | $ | (16,317 | ) | | $ | 217,655 | | | $ | — | |
| Securities held to maturity: | | | | | | | | | | | | | | | | | | | | |
| U.S. Treasury securities | | $ | 9,955 | | | $ | — | | | $ | (11 | ) | | $ | 9,944 | | | $ | — | |
| U.S. agency and mortgage-backed securities | | | 77,943 | | | | — | | | | (6,062 | ) | | | 71,881 | | | | — | |
| Obligations of states and political subdivisions | | | 10,431 | | | | 10 | | | | (871 | ) | | | 9,570 | | | | — | |
| Corporate debt securities | | | 3,000 | | | | — | | | | (257 | ) | | | 2,743 | | | | (68 | ) |
| Total securities held to maturity | | $ | 101,329 | | | $ | 10 | | | $ | (7,201 | ) | | $ | 94,138 | | | $ | (68 | ) |
| Total securities | | $ | 335,182 | | | $ | 129 | | | $ | (23,518 | ) | | $ | 311,793 | | | $ | (68 | ) |
| | | December 31, 2025 | |
| | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized (Losses) | | | Fair Value | | | Allowance for Credit Losses | |
| Securities available for sale: | | | | | | | | | | | | | | | | | | | | |
| U.S. Treasury securities | | $ | 37,566 | | | $ | 120 | | | $ | (348 | ) | | $ | 37,338 | | | $ | — | |
| U.S. agency and mortgage-backed securities | | | 131,172 | | | | 212 | | | | (8,587 | ) | | | 122,797 | | | | — | |
| Obligations of states and political subdivisions | | | 62,287 | | | | 31 | | | | (5,872 | ) | | | 56,446 | | | | — | |
| Corporate debt securities | | | 973 | | | | — | | | | (16 | ) | | | 957 | | | | — | |
| Total securities available for sale | | $ | 231,998 | | | $ | 363 | | | $ | (14,823 | ) | | $ | 217,538 | | | $ | — | |
| Securities held to maturity: | | | | | | | | | | | | | | | | | | | | |
| U.S. Treasury securities | | $ | 9,890 | | | $ | — | | | $ | (13 | ) | | $ | 9,877 | | | $ | — | |
| U.S. agency and mortgage-backed securities | | | 79,632 | | | | 1 | | | | (5,842 | ) | | | 73,791 | | | | — | |
| Obligations of states and political subdivisions | | | 10,433 | | | | 97 | | | | (655 | ) | | | 9,875 | | | | — | |
| Corporate debt securities | | | 3,000 | | | | — | | | | (259 | ) | | | 2,741 | | | | (83 | ) |
| Total securities held to maturity | | $ | 102,955 | | | $ | 98 | | | $ | (6,769 | ) | | $ | 96,284 | | | $ | (83 | ) |
| Total securities | | $ | 334,953 | | | $ | 461 | | | $ | (21,592 | ) | | $ | 313,822 | | | $ | (83 | ) |
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| Gain (Loss) on Securities [Table Text Block] |
| | | March 31, 2026 | |
| | | Less than 12 months | | | 12 months or more | | | Total | |
| | | Fair Value | | | Unrealized (Loss) | | | Fair Value | | | Unrealized (Loss) | | | Fair Value | | | Unrealized (Loss) | |
| Securities available for sale: | | | | | | | | | | | | | | | | | | | | | | | | |
| U.S. Treasury securities | | $ | 24,950 | | | $ | (170 | ) | | $ | 12,185 | | | $ | (308 | ) | | $ | 37,135 | | | $ | (478 | ) |
| U.S. agency and mortgage-backed securities | | | 42,253 | | | | (363 | ) | | | 59,916 | | | | (8,442 | ) | | | 102,169 | | | | (8,805 | ) |
| Obligations of states and political subdivisions | | | 6,573 | | | | (69 | ) | | | 45,739 | | | | (6,946 | ) | | | 52,312 | | | | (7,015 | ) |
| Corporate debt securities | | | 1,474 | | | | (19 | ) | | | — | | | | — | | | | 1,474 | | | | (19 | ) |
| Total securities available for sale | | $ | 75,250 | | | $ | (621 | ) | | $ | 117,840 | | | $ | (15,696 | ) | | $ | 193,090 | | | $ | (16,317 | ) |
| | | December 31, 2025 | |
| | | Less than 12 months | | | 12 months or more | | | Total | |
| | | Fair Value | | | Unrealized (Loss) | | | Fair Value | | | Unrealized (Loss) | | | Fair Value | | | Unrealized (Loss) | |
| Securities available for sale: | | | | | | | | | | | | | | | | | | | | | | | | |
| U.S. Treasury securities | | $ | 10,057 | | | $ | (13 | ) | | $ | 12,156 | | | $ | (335 | ) | | $ | 22,213 | | | $ | (348 | ) |
| U.S. agency and mortgage-backed securities | | | 24,346 | | | | (144 | ) | | | 61,732 | | | | (8,443 | ) | | | 86,078 | | | | (8,587 | ) |
| Obligations of states and political subdivisions | | | 2,764 | | | | (8 | ) | | | 47,552 | | | | (5,864 | ) | | | 50,316 | | | | (5,872 | ) |
| Corporate debt securities | | | 457 | | | | (16 | ) | | | — | | | | — | | | | 457 | | | | (16 | ) |
| Total securities available for sale | | $ | 37,624 | | | $ | (181 | ) | | $ | 121,440 | | | $ | (14,642 | ) | | $ | 159,064 | | | $ | (14,823 | ) |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | Available for Sale | | | Held to Maturity | |
| | | Amortized Cost | | | Fair Value | | | Amortized Cost | | | Fair Value | |
| Due within one year | | $ | 13,420 | | | $ | 13,237 | | | $ | 15,135 | | | $ | 15,075 | |
| Due after one year through five years | | | 83,346 | | | | 81,529 | | | | 16,118 | | | | 15,425 | |
| Due after five years through ten years | | | 46,550 | | | | 44,021 | | | | 16,473 | | | | 15,308 | |
| Due after ten years | | | 90,537 | | | | 78,868 | | | | 53,603 | | | | 48,330 | |
| | | $ | 233,853 | | | $ | 217,655 | | | $ | 101,329 | | | $ | 94,138 | |
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| Marketable Securities [Table Text Block] |
| | | March 31, 2026 | | | December 31, 2025 | |
| Federal Home Loan Bank stock | | $ | 2,627 | | | $ | 2,609 | |
| Federal Reserve Bank stock | | | 2,752 | | | | 2,752 | |
| Community Bankers’ Bank stock | | | 263 | | | | 263 | |
| | | $ | 5,642 | | | $ | 5,624 | |
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| Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block] |
| | | U.S. Treasury securities | | | U.S. agency and mortgage-backed securities | | | Obligations of states and political subdivisions | | | Corporate debt securities | | | Total Held to Maturity Securities | |
| March 31, 2026 | | | | | | | | | | | | | | | | | | | | |
| Aaa | | $ | 9,955 | | | $ | 23,480 | | | $ | 2,258 | | | $ | — | | | $ | 35,693 | |
| Aa1 / Aa2 / Aa3 | | | — | | | | — | | | | 8,173 | | | | — | | | | 8,173 | |
| A1 / A2 / A3 | | | — | | | | — | | | | — | | | | — | | | | — | |
| Baa1 / Baa2 / Baa3 | | | — | | | | — | | | | — | | | | 3,000 | | | | 3,000 | |
| Not rated - Agency (1) | | | — | | | | 54,463 | | | | — | | | | — | | | | 54,463 | |
| Total | | $ | 9,955 | | | $ | 77,943 | | | $ | 10,431 | | | $ | 3,000 | | | $ | 101,329 | |
| December 31, 2025 | | | | | | | | | | | | | | | | | | | | |
| Aaa | | $ | 9,890 | | | $ | 23,418 | | | $ | 2,263 | | | $ | — | | | $ | 35,571 | |
| Aa1 / Aa2 / Aa3 | | | — | | | | — | | | | 8,170 | | | | — | | | | 8,170 | |
| Baa1 / Baa2 / Baa3 | | | — | | | | — | | | | — | | | | 3,000 | | | | 3,000 | |
| Not rated - Agency (1) | | | — | | | | 56,214 | | | | — | | | | — | | | | 56,214 | |
| Total | | $ | 9,890 | | | $ | 79,632 | | | $ | 10,433 | | | $ | 3,000 | | | $ | 102,955 | |
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| Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table Text Block] |
| | | U.S. Treasury securities | | | U.S. agency and mortgage-backed securities | | | Obligations of states and political subdivisions | | | Corporate debt securities | | | Total Held to Maturity Securities | |
| Balance, December 31, 2025 | | $ | — | | | $ | — | | | $ | — | | | $ | 83 | | | $ | 83 | |
| Provision for credit losses | | | — | | | | — | | | | — | | | | (15 | ) | | | (15 | ) |
| Charge-offs of securities | | | — | | | | — | | | | — | | | | — | | | | — | |
| Recoveries | | | — | | | | — | | | | — | | | | — | | | | — | |
| Balance, March 31, 2026 | | $ | — | | | $ | — | | | $ | — | | | $ | 68 | | | $ | 68 | |
| | | U.S. Treasury securities | | | U.S. agency and mortgage-backed securities | | | Obligations of states and political subdivisions | | | Corporate debt securities | | | Total Held to Maturity Securities | |
| Balance, December 31, 2024 | | $ | — | | | $ | — | | | $ | — | | | $ | 95 | | | $ | 95 | |
| Provision for credit losses | | | — | | | | — | | | | — | | | | (7 | ) | | | (7 | ) |
| Charge-offs of securities | | | — | | | | — | | | | — | | | | — | | | | — | |
| Recoveries | | | — | | | | — | | | | — | | | | — | | | | — | |
| Balance, March 31, 2025 | | $ | — | | | $ | — | | | $ | — | | | $ | 88 | | | $ | 88 | |
| | | U.S. Treasury securities | | | U.S. agency and mortgage-backed securities | | | Obligations of states and political subdivisions | | | Corporate debt securities | | | Total Held to Maturity Securities | |
| Balance, December 31, 2024 | | $ | — | | | $ | — | | | $ | — | | | $ | 95 | | | $ | 95 | |
| Provision for credit losses | | | — | | | | — | | | | — | | | | (12 | ) | | | (12 | ) |
| Charge-offs of securities | | | — | | | | — | | | | — | | | | — | | | | — | |
| Recoveries | | | — | | | | — | | | | — | | | | — | | | | — | |
| Balance, December 31, 2025 | | $ | — | | | $ | — | | | $ | — | | | $ | 83 | | | $ | 83 | |
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