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Note 3 - Available-for-sale Securities (Tables) | 3 Months Ended
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Mar. 31, 2019
Notes Tables |
Debt Securities, Available-for-sale [Table Text Block] |
(In thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Fair Value |
March 31, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 20,017 |  |  |  | 84 |  |  |  | (125 | ) |  |  | 19,976 |
Corporate bonds |  |  | 14,000 |  |  |  | - |  |  |  | (1,172 | ) |  |  | 12,828 |
Subordinated notes |  |  | 5,899 |  |  |  | 81 |  |  |  | - |  |  |  | 5,980 |
U.S. Treasury notes |  |  | 1,488 |  |  |  | 3 |  |  |  | - |  |  |  | 1,491 |
|  | $ | 41,404 |  |  |  | 168 |  |  |  | (1,297 | ) |  |  | 40,275 |
December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 20,626 |  |  |  | 43 |  |  |  | (196 | ) |  |  | 20,473 |
Corporate bonds |  |  | 14,000 |  |  |  | - |  |  |  | (1,026 | ) |  |  | 12,974 |
Subordinated notes |  |  | 4,500 |  |  |  | 64 |  |  |  | - |  |  |  | 4,564 |
U.S. Treasury notes |  |  | 1,484 |  |  |  | 1 |  |  |  | - |  |  |  | 1,485 |
|  | $ | 40,610 |  |  |  | 108 |  |  |  | (1,222 | ) |  |  | 39,496 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
(In thousands) |  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized (Loss) |  |  | Fair Value |  |  | Unrealized (Loss) |  |  | Fair Value |  |  | Unrealized (Loss) |
March 31, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 2,972 |  |  |  | (23 | ) |  |  | 3,778 |  |  |  | (102 | ) |  |  | 6,750 |  |  |  | (125 | )
Corporate bonds |  |  | - |  |  |  | - |  |  |  | 12,828 |  |  |  | (1,172 | ) |  |  | 12,828 |  |  |  | (1,172 | )
|  | $ | 2,972 |  |  |  | (23 | ) |  |  | 16,606 |  |  |  | (1,274 | ) |  |  | 19,578 |  |  |  | (1,297 | )
December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 8,024 |  |  |  | (38 | ) |  |  | 5,422 |  |  |  | (158 | ) |  |  | 13,446 |  |  |  | (196 | )
Corporate bonds |  |  | - |  |  |  | - |  |  |  | 12,974 |  |  |  | (1,026 | ) |  |  | 12,974 |  |  |  | (1,026 | )
|  | $ | 8,024 |  |  |  | (38 | ) |  |  | 18,396 |  |  |  | (1,184 | ) |  |  | 26,420 |  |  |  | (1,222 | )
Investments Classified by Contractual Maturity Date [Table Text Block] |
(In thousands) |  | Amortized Cost |  |  | Fair Value |
|  | Due Within 5 years |  |  | Due After 5 years through 10 years |  |  | Due After 10 years |  |  | Total |  |  | Due Within 5 years |  |  | Due After 5 years through 10 years |  |  | Due After 10 years |  |  | Total |
March 31, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | - |  |  |  | 9,000 |  |  |  | 5,000 |  |  |  | 14,000 |  |  |  | - |  |  |  | 8,278 |  |  |  | 4,550 |  |  |  | 12,828 |
Subordinated notes |  |  | - |  |  |  | 5,899 |  |  |  | - |  |  |  | 5,899 |  |  |  | - |  |  |  | 5,980 |  |  |  | - |  |  |  | 5,980 |
U.S. Treasury notes |  |  | 1,488 |  |  |  | - |  |  |  | - |  |  |  | 1,488 |  |  |  | 1,491 |  |  |  | - |  |  |  | - |  |  |  | 1,491 |
Available-for-sale securities with single maturity dates |  |  | 1,488 |  |  |  | 14,899 |  |  |  | 5,000 |  |  |  | 21,387 |  |  |  | 1,491 |  |  |  | 14,258 |  |  |  | 4,550 |  |  |  | 20,299 |
U. S. Government agency mortgage-backed securities |  |  | 9,671 |  |  |  | 2,445 |  |  |  | 7,901 |  |  |  | 20,017 |  |  |  | 9,664 |  |  |  | 2,368 |  |  |  | 7,944 |  |  |  | 19,976 |
|  | $ | 11,159 |  |  |  | 17,344 |  |  |  | 12,901 |  |  |  | 41,404 |  |  |  | 11,155 |  |  |  | 16,626 |  |  |  | 12,494 |  |  |  | 40,275 |
December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | - |  |  |  | 9,000 |  |  |  | 5,000 |  |  |  | 14,000 |  |  |  | - |  |  |  | 8,537 |  |  |  | 4,437 |  |  |  | 12,974 |
Subordinated notes |  |  | - |  |  |  | 4,500 |  |  |  | - |  |  |  | 4,500 |  |  |  | - |  |  |  | 4,564 |  |  |  | - |  |  |  | 4,564 |
U.S. Treasury notes |  |  | 1,484 |  |  |  | - |  |  |  | - |  |  |  | 1,484 |  |  |  | 1,485 |  |  |  | - |  |  |  | - |  |  |  | 1,485 |
Available-for-sale securities with single maturity dates |  |  | 1,484 |  |  |  | 13,500 |  |  |  | 5,000 |  |  |  | 19,984 |  |  |  | 1,485 |  |  |  | 13,101 |  |  |  | 4,437 |  |  |  | 19,023 |
U. S. Government agency mortgage-backed securities |  |  | 6,842 |  |  |  | 5,668 |  |  |  | 8,116 |  |  |  | 20,626 |  |  |  | 6,844 |  |  |  | 5,530 |  |  |  | 8,099 |  |  |  | 20,473 |
|  | $ | 8,326 |  |  |  | 19,168 |  |  |  | 13,116 |  |  |  | 40,610 |  |  |  | 8,329 |  |  |  | 18,631 |  |  |  | 12,536 |  |  |  | 39,496 |

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