Note 3 - Investment Securities (Tables)
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12 Months Ended |
Dec. 31, 2024 |
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| Notes Tables |
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| Debt Securities, Available-for-Sale [Table Text Block] |
| | | December 31, 2024 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Collateralized Mortgage Backed | | $ | 21,298 | | | $ | — | | | $ | (4,105 | ) | | $ | 17,193 | |
| Subordinated Debt | | | 8,971 | | | | — | | | | (1,064 | ) | | | 7,907 | |
| Preferred Stock | | | 453 | | | | — | | | | — | | | | 453 | |
| Municipal Securities | | | | | | | | | | | | | | | | |
| Taxable | | | 10,623 | | | | — | | | | (2,422 | ) | | | 8,201 | |
| Tax-exempt | | | 22,024 | | | | — | | | | (2,403 | ) | | | 19,621 | |
| U.S. Governmental Agencies | | | 2,392 | | | | 4 | | | | (24 | ) | | | 2,372 | |
| Total | | $ | 65,761 | | | $ | 4 | | | $ | (10,018 | ) | | $ | 55,747 | |
| | | December 31, 2023 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Collateralized Mortgage Backed | | $ | 23,446 | | | $ | — | | | $ | (3,931 | ) | | $ | 19,515 | |
| Subordinated Debt | | | 9,970 | | | | — | | | | (1,503 | ) | | | 8,467 | |
| Municipal Securities | | | | | | | | | | | | | | | | |
| Taxable | | | 10,649 | | | | — | | | | (2,342 | ) | | | 8,307 | |
| Tax-exempt | | | 22,668 | | | | 23 | | | | (1,949 | ) | | | 20,742 | |
| U.S. Governmental Agencies | | | 2,932 | | | | 3 | | | | (38 | ) | | | 2,897 | |
| Total | | $ | 69,665 | | | $ | 26 | | | $ | (9,763 | ) | | $ | 59,928 | |
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| Debt Securities, Held-to-Maturity [Table Text Block] |
| | | December 31, 2024 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Municipal Securities | | | | | | | | | | | | | | | | |
| Tax-exempt | | $ | 13,578 | | | $ | 1 | | | $ | (200 | ) | | $ | 13,379 | |
| Subordinated Debt | | | 2,500 | | | | — | | | | (14 | ) | | | 2,486 | |
| Total | | $ | 16,078 | | | $ | 1 | | | $ | (214 | ) | | $ | 15,865 | |
| | | December 31, 2023 | |
| (Dollars in thousands) | | Amortized Cost | | | Gross Unrealized Gains | | | Gross Unrealized Losses | | | Fair Value | |
| Municipal Securities | | | | | | | | | | | | | | | | |
| Tax-exempt | | $ | 14,775 | | | $ | 19 | | | $ | (121 | ) | | $ | 14,673 | |
| Subordinated Debt | | | 2,500 | | | | — | | | | (10 | ) | | | 2,490 | |
| Total | | $ | 17,275 | | | $ | 19 | | | $ | (131 | ) | | $ | 17,163 | |
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| Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block] |
| (Dollars in thousands) | | Municipal Securities | | | Subordinated Debt | | | Total HTM securities | |
| December 31, 2024 | | | | | | | | | | | | |
| Credit Rating: | | | | | | | | | | | | |
| AAA/AA/A | | $ | 13,578 | | | $ | — | | | $ | 13,578 | |
| Not Rated - Non Agency | | | — | | | | 2,500 | | | $ | 2,500 | |
| Total | | $ | 13,578 | | | $ | 2,500 | | | $ | 16,078 | |
| December 31, 2023 | | | | | | | | | | | | |
| Credit Rating: | | | | | | | | | | | | |
| AAA/AA/A | | $ | 14,775 | | | $ | — | | | $ | 14,775 | |
| Not Rated - Non Agency | | | — | | | | 2,500 | | | | 2,500 | |
| Total | | $ | 14,775 | | | $ | 2,500 | | | $ | 17,275 | |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | December 31, 2024 | |
| | | Available-for-Sale | | | Held-to-Maturity | |
| (Dollars in thousands) | | Amortized Cost | | | Fair Value | | | Amortized Cost | | | Fair Value | |
| Due in one year or less | | $ | 1,000 | | | $ | 993 | | | $ | 370 | | | $ | 370 | |
| Due from one to five years | | | — | | | | — | | | | 4,017 | | | | 3,973 | |
| Due from after five to ten years | | | 14,430 | | | | 12,997 | | | | 5,945 | | | | 5,886 | |
| Due after ten years | | | 50,331 | | | | 41,757 | | | | 5,746 | | | | 5,636 | |
| Total | | $ | 65,761 | | | $ | 55,747 | | | $ | 16,078 | | | $ | 15,865 | |
| | | December 31, 2024 | |
| | | Less than 12 Months | | | 12 Months or Longer | | | Total | |
| (Dollars in thousands) | | Estimated Fair Value | | | Unrealized Loss | | | Estimated Fair Value | | | Unrealized Loss | | | Estimated Fair Value | | | Unrealized Loss | |
| Available-for-sale: | | | | | | | | | | | | | | | | | | | | | | | | |
| Collateralized Mortgage Backed | | $ | — | | | $ | — | | | $ | 17,105 | | | $ | (4,105 | ) | | $ | 17,105 | | | $ | (4,105 | ) |
| Subordinated Debt | | | 215 | | | | (35 | ) | | | 7,191 | | | | (1,029 | ) | | | 7,406 | | | | (1,064 | ) |
| Municipal Securities | | | | | | | | | | | | | | | | | | | | | | | | |
| Taxable | | | — | | | | — | | | | 8,201 | | | | (2,422 | ) | | | 8,201 | | | | (2,422 | ) |
| Tax-exempt | | | 2,658 | | | | (36 | ) | | | 16,593 | | | | (2,367 | ) | | | 19,251 | | | | (2,403 | ) |
| U.S Governmental Agencies | | | — | | | | — | | | | 614 | | | | (24 | ) | | | 614 | | | | (24 | ) |
| Total | | $ | 2,873 | | | $ | (71 | ) | | $ | 49,704 | | | $ | (9,947 | ) | | $ | 52,577 | | | $ | (10,018 | ) |
| | | December 31, 2023 | |
| | | 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 | | $ | — | | | $ | — | | | $ | 19,440 | | | $ | (3,931 | ) | | $ | 19,440 | | | $ | (3,931 | ) |
| Subordinated Debt | | | — | | | | — | | | | 7,717 | | | | (1,503 | ) | | | 7,717 | | | | (1,503 | ) |
| Municipal Securities | | | | | | | | | | | | | | | | | | | | | | | | |
| Taxable | | | — | | | | — | | | | 8,307 | | | | (2,342 | ) | | | 8,307 | | | | (2,342 | ) |
| Tax-exempt | | | 1,986 | | | | (34 | ) | | | 16,510 | | | | (1,915 | ) | | | 18,496 | | | | (1,949 | ) |
| U.S Government Agencies | | | 1,515 | | | | (1 | ) | | | 845 | | | | (37 | ) | | | 2,360 | | | | (38 | ) |
| Total | | $ | 3,501 | | | $ | (35 | ) | | $ | 52,819 | | | $ | (9,728 | ) | | $ | 56,320 | | | $ | (9,763 | ) |
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