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Note 7 - Investment and Equity Securities (Tables) | 3 Months Ended
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Mar. 31, 2018
Notes Tables |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  | March 31, 2018 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. government agency securities |  | $ | 8,342 |  |  | $ | 70 |  |  | $ | (107 | ) |  | $ | 8,305 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 504 |  |  |  | 14 |  |  |  | - |  |  |  | 518 |
Tax-exempt |  |  | 64,986 |  |  |  | 829 |  |  |  | (754 | ) |  |  | 65,061 |
Mortgage-backed securities in government-sponsored entities |  |  | 17,900 |  |  |  | 66 |  |  |  | (588 | ) |  |  | 17,378 |
Total |  | $ | 91,732 |  |  | $ | 979 |  |  | $ | (1,449 | ) |  | $ | 91,262 |
|  | December 31, 2017 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. government agency securities |  | $ | 8,664 |  |  | $ | 126 |  |  | $ | (71 | ) |  | $ | 8,719 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 504 |  |  |  | 8 |  |  |  | - |  |  |  | 512 |
Tax-exempt |  |  | 65,408 |  |  |  | 1,547 |  |  |  | (38 | ) |  |  | 66,917 |
Mortgage-backed securities in government-sponsored entities |  |  | 18,640 |  |  |  | 157 |  |  |  | (287 | ) |  |  | 18,510 |
Total debt securities |  |  | 93,216 |  |  |  | 1,838 |  |  |  | (396 | ) |  |  | 94,658 |
Equity securities in financial institutions |  |  | 415 |  |  |  | 210 |  |  |  | - |  |  |  | 625 |
Total |  | $ | 93,631 |  |  | $ | 2,048 |  |  | $ | (396 | ) |  | $ | 95,283 |
Equity Securities without Readily Determinable Fair Value [Table Text Block] |
|  | 2018 |
|  | Year-to-Date |  |  | Life-to-Date |
Amortized cost |  | $ | 232 |  |  | $ | 232 |
Impairment |  |  | - |  |  |  | - |
Observable price changes |  |  | 18 |  |  |  | 18 |
Carrying value |  | $ | 250 |  |  | $ | 250 |
Gain (Loss) on Securities [Table Text Block] |
|  | 2018 |
(Dollar amounts in thousands) |  |  |  |
Net gains recognized in equity securities during the period |  | $ | 18 |
Less: Net gains realized on the sale of equity securities during the period |  |  | - |
Unrealized gains recognized in equity securities held at reporting date |  | $ | 18 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 4,252 |  |  | $ | 4,303 |
Due after one year through five years |  |  | 7,607 |  |  |  | 7,713 |
Due after five years through ten years |  |  | 12,489 |  |  |  | 12,420 |
Due after ten years |  |  | 67,384 |  |  |  | 66,826 |
Total |  | $ | 91,732 |  |  | $ | 91,262 |
Realized Gain (Loss) on Investments [Table Text Block] |
|  | For the Three Months |
(Dollar amounts in thousands) |  | Ended March 31, |
|  | 2018 |  |  | 2017 |
Proceeds from sales |  | $ | - |  |  | $ | - |
Gross realized gains |  |  | - |  |  |  | 488 | (1)
Gross realized losses |  |  | - |  |  |  | - |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | March 31, 2018 |
|  | Less than Twelve Months |  |  | Twelve Months or Greater |  |  | Total |
|  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollar amounts in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government agency securities |  | $ | 548 |  |  | $ | (12 | ) |  | $ | 3,899 |  |  | $ | (95 | ) |  | $ | 4,447 |  |  | $ | (107 | )
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 25,087 |  |  |  | (660 | ) |  |  | 2,721 |  |  |  | (94 | ) |  |  | 27,808 |  |  |  | (754 | )
Mortgage-backed securities in government-sponsored entities |  |  | 5,941 |  |  |  | (203 | ) |  |  | 8,136 |  |  |  | (385 | ) |  |  | 14,077 |  |  |  | (588 | )
Total |  | $ | 31,576 |  |  | $ | (875 | ) |  | $ | 14,756 |  |  | $ | (574 | ) |  | $ | 46,332 |  |  | $ | (1,449 | )
|  | December 31, 2017 |
|  | Less than Twelve Months |  |  | Twelve Months or Greater |  |  | Total |
|  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollar amounts in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government agency securities |  | $ | 557 |  |  | $ | (4 | ) |  | $ | 4,036 |  |  | $ | (67 | ) |  | $ | 4,593 |  |  | $ | (71 | )
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 1,009 |  |  |  | (6 | ) |  |  | 2,784 |  |  |  | (32 | ) |  |  | 3,793 |  |  |  | (38 | )
Mortgage-backed securities in government-sponsored entities |  |  | 5,698 |  |  |  | (71 | ) |  |  | 8,734 |  |  |  | (216 | ) |  |  | 14,432 |  |  |  | (287 | )
Total |  | $ | 7,264 |  |  | $ | (81 | ) |  | $ | 15,554 |  |  | $ | (315 | ) |  | $ | 22,818 |  |  | $ | (396 | )

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