Note 2 - Investment Securities (Tables)
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3 Months Ended |
Mar. 31, 2026 |
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| Notes Tables |
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| Debt Securities, Available-for-Sale [Table Text Block] |
| | | March 31, 2026 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Collateralized Mortgage Backed | | $ | 18,642 | | | $ | 4 | | | $ | (3,012 | ) | | $ | 15,634 | |
| Subordinated Debt | | | 11,626 | | | | 20 | | | | (641 | ) | | | 11,005 | |
| Preferred Stock | | | 471 | | | | — | | | | — | | | | 471 | |
| Municipal Securities: | | | | | | | | | | | | | | | | |
| Taxable | | | 9,591 | | | | — | | | | (1,921 | ) | | | 7,670 | |
| Tax-exempt | | | 22,348 | | | | 10 | | | | (2,154 | ) | | | 20,204 | |
| U.S. Governmental Agencies | | | 2,044 | | | | 9 | | | | (16 | ) | | | 2,037 | |
| Total | | $ | 64,722 | | | $ | 43 | | | $ | (7,744 | ) | | $ | 57,021 | |
| | | December 31, 2025 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Collateralized Mortgage Backed | | $ | 19,027 | | | $ | 7 | | | $ | (2,981 | ) | | $ | 16,053 | |
| Subordinated Debt | | | 11,872 | | | | 2 | | | | (668 | ) | | | 11,206 | |
| Preferred Stock | | | 468 | | | | — | | | | — | | | | 468 | |
| Municipal Securities: | | | | | | | | | | | | | | | | |
| Taxable | | | 9,597 | | | | — | | | | (1,908 | ) | | | 7,689 | |
| Tax-exempt | | | 22,383 | | | | 25 | | | | (1,957 | ) | | | 20,451 | |
| U.S. Governmental Agencies | | | 2,098 | | | | 6 | | | | (17 | ) | | | 2,087 | |
| Total | | $ | 65,445 | | | $ | 40 | | | $ | (7,531 | ) | | $ | 57,954 | |
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| Debt Securities, Held-to-Maturity [Table Text Block] |
| | | March 31, 2026 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Municipal Securities: | | | | | | | | | | | | | | | | |
| Tax-exempt | | $ | 13,790 | | | $ | 20 | | | $ | (111 | ) | | $ | 13,699 | |
| Total | | $ | 13,790 | | | $ | 20 | | | $ | (111 | ) | | $ | 13,699 | |
| | | December 31, 2025 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Municipal Securities: | | | | | | | | | | | | | | | | |
| Tax-exempt | | $ | 13,798 | | | $ | 32 | | | $ | (76 | ) | | $ | 13,754 | |
| Total | | $ | 13,798 | | | $ | 32 | | | $ | (76 | ) | | $ | 13,754 | |
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| Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block] |
| (Dollars in thousands) | | Municipal Securities | | | Total HTM securities | |
| March 31, 2026 | | | | | | | | |
| Credit Rating: | | | | | | | | |
| AAA/AA/A | | $ | 13,790 | | | $ | 13,790 | |
| Total | | $ | 13,790 | | | $ | 13,790 | |
| December 31, 2025 | | | | | | | | |
| Credit Rating: | | | | | | | | |
| AAA/AA/A | | $ | 13,798 | | | $ | 13,798 | |
| Total | | $ | 13,798 | | | $ | 13,798 | |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | March 31, 2026 | |
| | | Available-for-Sale | | | Held-to-Maturity | |
| (Dollars in thousands) | | Amortized Cost | | | Fair Value | | | Amortized Cost | | | Fair Value | |
| Due in one year or less | | $ | — | | | $ | — | | | $ | 399 | | | $ | 400 | |
| Due from one to five years | | | 1,970 | | | | 1,884 | | | | 3,140 | | | | 3,135 | |
| Due from after five to ten years | | | 17,865 | | | | 16,937 | | | | 4,102 | | | | 4,118 | |
| Due after ten years | | | 44,887 | | | | 38,200 | | | | 6,149 | | | | 6,046 | |
| Total | | $ | 64,722 | | | $ | 57,021 | | | $ | 13,790 | | | $ | 13,699 | |
| | | December 31, 2025 | |
| | | Available-for-Sale | | | Held-to-Maturity | |
| (Dollars in thousands) | | Amortized Cost | | | Fair Value | | | Amortized Cost | | | Fair Value | |
| Due in one year or less | | $ | — | | | $ | — | | | $ | 399 | | | $ | 399 | |
| Due from one to five years | | | 1,470 | | | | 1,395 | | | | 3,140 | | | | 3,134 | |
| Due from after five to ten years | | | 17,645 | | | | 16,721 | | | | 3,606 | | | | 3,633 | |
| Due after ten years | | | 46,330 | | | | 39,838 | | | | 6,653 | | | | 6,588 | |
| Total | | $ | 65,445 | | | $ | 57,954 | | | $ | 13,798 | | | $ | 13,754 | |
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| Gain (Loss) on Securities [Table Text Block] |
| | | March 31, 2026 | |
| | | Less than 12 Months | | | 12 Months or Longer | | | Total | |
| (Dollars in thousands) | | Fair Value | | | Unrealized Loss | | | Fair Value | | | Unrealized Loss | | | Fair Value | | | Unrealized Loss | |
| Available-for-sale: | | | | | | | | | | | | | | | | | | | | | | | | |
| Collateralized Mortgage Backed | | $ | — | | | $ | — | | | $ | 15,410 | | | $ | (3,012 | ) | | $ | 15,410 | | | $ | (3,012 | ) |
| Subordinated Debt | | | 1,647 | | | | (39 | ) | | | 7,117 | | | | (602 | ) | | | 8,764 | | | | (641 | ) |
| Municipal securities: | | | | | | | | | | | | | | | | | | | | | | | | |
| Taxable | | | — | | | | — | | | | 7,670 | | | | (1,921 | ) | | | 7,670 | | | | (1,921 | ) |
| Tax-exempt | | | 4,459 | | | | (131 | ) | | | 12,260 | | | | (2,023 | ) | | | 16,719 | | | | (2,154 | ) |
| U.S. Governmental Agencies | | | — | | | | — | | | | 573 | | | | (16 | ) | | | 573 | | | | (16 | ) |
| Total | | $ | 6,106 | | | $ | (170 | ) | | $ | 43,030 | | | $ | (7,574 | ) | | $ | 49,136 | | | $ | (7,744 | ) |
| | | December 31, 2025 | |
| | | Less than 12 Months | | | 12 Months or Longer | | | Total | |
| (Dollars in thousands) | | Fair Value | | | Unrealized Loss | | | Fair Value | | | Unrealized Loss | | | Fair Value | | | Unrealized Loss | |
| Available-for-sale: | | | | | | | | | | | | | | | | | | | | | | | | |
| Collateralized Mortgage Backed | | $ | — | | | $ | — | | | $ | 15,807 | | | $ | (2,981 | ) | | $ | 15,807 | | | $ | (2,981 | ) |
| Subordinated Debt | | | 1,857 | | | | (45 | ) | | | 7,347 | | | | (623 | ) | | | 9,204 | | | | (668 | ) |
| Municipal Securities: | | | | | | | | | | | | | | | | | | | | | | | | |
| Taxable | | | — | | | | — | | | | 7,689 | | | | (1,908 | ) | | | 7,689 | | | | (1,908 | ) |
| Tax-exempt | | | — | | | | — | | | | 14,796 | | | | (1,957 | ) | | | 14,796 | | | | (1,957 | ) |
| U.S. Government Agencies | | | — | | | | — | | | | 579 | | | | (17 | ) | | | 579 | | | | (17 | ) |
| Total | | $ | 1,857 | | | $ | (45 | ) | | $ | 46,218 | | | $ | (7,486 | ) | | $ | 48,075 | | | $ | (7,531 | ) |
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