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Note 2 - Securities (Tables) | 12 Months Ended
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Dec. 31, 2025
Notes Tables |
Debt Securities, Available-for-Sale [Table Text Block] |
December 31, 2025 |  | U.S. Treasuries |  |  | U.S. government agency obligations |  |  | Municipal obligations |  |  | Mortgage-backed residential obligations |  |  | Collateralized mortgage obligations |  |  | Total available-for-sale |
|  |  |  |  |  | (Dollars in thousands) |
1 year or less |  | $ | — |  |  | $ | — |  |  | $ | 198 |  |  | $ | — |  |  | $ | 1,412 |  |  | $ | 1,610 |
1 to 5 years |  |  | 7,085 |  |  |  | 7,208 |  |  |  | 1,202 |  |  |  | 8,860 |  |  |  | 17,757 |  |  |  | 42,112 |
5 to 10 years |  |  | — |  |  |  | 1,326 |  |  |  | 3,642 |  |  |  | 14,336 |  |  |  | 5,918 |  |  |  | 25,222 |
After 10 years |  |  | — |  |  |  | — |  |  |  | 7,104 |  |  |  | 573 |  |  |  | 2,098 |  |  |  | 9,775 |
Fair value |  | $ | 7,085 |  |  | $ | 8,534 |  |  | $ | 12,146 |  |  | $ | 23,769 |  |  | $ | 27,185 |  |  | $ | 78,719 |
Gross unrealized gains |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 5 |
Gross unrealized losses |  |  | (7 | ) |  |  | (685 | ) |  |  | (1,829 | ) |  |  | (2,990 | ) |  |  | (2,552 | ) |  |  | (8,063 | )
Amortized cost |  | $ | 7,088 |  |  | $ | 9,219 |  |  | $ | 13,975 |  |  | $ | 26,759 |  |  | $ | 29,736 |  |  | $ | 86,777 |
December 31, 2024 |  | U.S. Treasuries |  |  | U.S. government agency obligations |  |  | Municipal obligations |  |  | Mortgage-backed residential obligations |  |  | Collateralized mortgage obligations |  |  | Total available-for-sale |
|  |  |  |  |  | (Dollars in thousands) |
1 year or less |  | $ | — |  |  | $ | 1,000 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,000 |
1 to 5 years |  |  | — |  |  |  | 3,047 |  |  |  | 1,452 |  |  |  | 8,971 |  |  |  | 15,086 |  |  |  | 28,556 |
5 to 10 years |  |  | — |  |  |  | 4,610 |  |  |  | 2,401 |  |  |  | 15,794 |  |  |  | 7,786 |  |  |  | 30,591 |
After 10 years |  |  | — |  |  |  | — |  |  |  | 7,883 |  |  |  | 1,150 |  |  |  | 2,069 |  |  |  | 11,102 |
Fair value |  | $ | — |  |  | $ | 8,657 |  |  | $ | 11,736 |  |  | $ | 25,915 |  |  | $ | 24,941 |  |  | $ | 71,249 |
Gross unrealized gains |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross unrealized losses |  |  | — |  |  |  | (1,062 | ) |  |  | (2,367 | ) |  |  | (4,766 | ) |  |  | (3,842 | ) |  |  | (12,037 | )
Amortized cost |  | $ | — |  |  | $ | 9,719 |  |  | $ | 14,103 |  |  | $ | 30,681 |  |  | $ | 28,783 |  |  | $ | 83,286 |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
December 31, 2025 |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  |  | (Dollars in thousands)
U.S. Treasuries |  | $ | 2,990 |  |  | $ | 7 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,990 |  |  | $ | 7 |
U.S. government agency obligations |  |  | 1,000 |  |  |  | 1 |  |  |  | 7,534 |  |  |  | 684 |  |  |  | 8,534 |  |  |  | 685 |
Municipal obligations |  |  | — |  |  |  | — |  |  |  | 12,146 |  |  |  | 1,829 |  |  |  | 12,146 |  |  |  | 1,829 |
Mortgage-backed residential obligations |  |  | — |  |  |  | — |  |  |  | 23,769 |  |  |  | 2,990 |  |  |  | 23,769 |  |  |  | 2,990 |
Collateralized mortgage obligations |  |  | 1,530 |  |  |  | 24 |  |  |  | 24,654 |  |  |  | 2,528 |  |  |  | 26,184 |  |  |  | 2,552 |
Total |  | $ | 5,520 |  |  | $ | 32 |  |  | $ | 68,103 |  |  | $ | 8,031 |  |  | $ | 73,623 |  |  | $ | 8,063 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agency obligations |  | $ | — |  |  | $ | — |  |  | $ | 8,657 |  |  | $ | 1,062 |  |  | $ | 8,657 |  |  | $ | 1,062 |
Municipal obligations |  |  | 467 |  |  |  | 28 |  |  |  | 11,269 |  |  |  | 2,339 |  |  |  | 11,736 |  |  |  | 2,367 |
Mortgage-backed residential obligations |  |  | — |  |  |  | — |  |  |  | 25,915 |  |  |  | 4,766 |  |  |  | 25,915 |  |  |  | 4,766 |
Collateralized mortgage obligations |  |  | — |  |  |  | — |  |  |  | 24,941 |  |  |  | 3,842 |  |  |  | 24,941 |  |  |  | 3,842 |
Total |  | $ | 467 |  |  | $ | 28 |  |  | $ | 70,782 |  |  | $ | 12,009 |  |  | $ | 71,249 |  |  | $ | 12,037 |

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