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Note 6 - Investment Securities Available for Sale (Tables) | 3 Months Ended
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Mar. 31, 2016
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  | March 31, 2016 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. government agency securities |  | $ | 18,616 |  |  | $ | 313 |  |  | $ | (76 | ) |  | $ | 18,853 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 1,989 |  |  |  | 187 |  |  |  | (1 | ) |  |  | 2,175 |
Tax-exempt |  |  | 91,605 |  |  |  | 3,394 |  |  |  | (173 | ) |  |  | 94,826 |
Mortgage-backed securities in government-sponsored entities |  |  | 23,550 |  |  |  | 380 |  |  |  | (117 | ) |  |  | 23,813 |
Private-label mortgage-backed securities |  |  | 1,927 |  |  |  | 153 |  |  |  | (1 | ) |  |  | 2,079 |
Total debt securities |  |  | 137,687 |  |  |  | 4,427 |  |  |  | (368 | ) |  |  | 141,746 |
Equity securities in financial institutions |  |  | 750 |  |  |  | 64 |  |  |  | - |  |  |  | 814 |
Total |  | $ | 138,437 |  |  | $ | 4,491 |  |  | $ | (368 | ) |  | $ | 142,560 |
|  | December 31, 2015 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. government agency securities |  | $ | 21,655 |  |  | $ | 245 |  |  | $ | (271 | ) |  | $ | 21,629 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 1,989 |  |  |  | 134 |  |  |  | - |  |  |  | 2,123 |
Tax-exempt |  |  | 91,940 |  |  |  | 3,402 |  |  |  | (175 | ) |  |  | 95,167 |
Mortgage-backed securities in government-sponsored entities |  |  | 24,480 |  |  |  | 316 |  |  |  | (272 | ) |  |  | 24,524 |
Private-label mortgage-backed securities |  |  | 2,079 |  |  |  | 184 |  |  |  | - |  |  |  | 2,263 |
Total debt securities |  |  | 142,143 |  |  |  | 4,281 |  |  |  | (718 | ) |  |  | 145,706 |
Equity securities in financial institutions |  |  | 750 |  |  |  | 64 |  |  |  | - |  |  |  | 814 |
Total |  | $ | 142,893 |  |  | $ | 4,345 |  |  | $ | (718 | ) |  | $ | 146,520 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 1,224 |  |  | $ | 1,237 |
Due after one year through five years |  |  | 11,171 |  |  |  | 11,380 |
Due after five years through ten years |  |  | 18,523 |  |  |  | 19,327 |
Due after ten years |  |  | 106,769 |  |  |  | 109,802 |
Total |  | $ | 137,687 |  |  | $ | 141,746 |
Realized Gain (Loss) on Investments [Table Text Block] |
(Dollar amounts in thousands) |  | For the Three Months Ended March 31, |
|  | 2016 |  |  | 2015 |
Proceeds from sales |  | $ | 1,322 |  |  | $ | 1,590 |
Gross realized gains |  |  | 51 |  |  |  | 48 |
Gross realized losses |  |  | - |  |  |  | (24 | )
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | March 31, 2016 |
|  | 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 |  | $ | 4,565 |  |  | $ | (9 | ) |  | $ | 7,612 |  |  | $ | (67 | ) |  | $ | 12,177 |  |  | $ | (76 | )
Obligations of states and political subdivisions |  |  | 8,999 |  |  |  | (122 | ) |  |  | 1,426 |  |  |  | (52 | ) |  |  | 10,425 |  |  |  | (174 | )
Mortgage-backed securities in government-sponsored entities |  |  | 4,000 |  |  |  | (7 | ) |  |  | 6,675 |  |  |  | (110 | ) |  |  | 10,675 |  |  |  | (117 | )
Private-label mortgage-backed securities |  |  | 109 |  |  |  | (1 | ) |  |  | - |  |  |  | - |  |  |  | 109 |  |  |  | (1 | )
Total |  | $ | 17,673 |  |  | $ | (139 | ) |  | $ | 15,713 |  |  | $ | (229 | ) |  | $ | 33,386 |  |  | $ | (368 | )
|  | December 31, 2015 |
|  | Less than Twelve Months |  |  | Twelve Months or Greater |  |  | Total |
|  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. government agency securities |  | $ | 3,818 |  |  | $ | (57 | ) |  | $ | 10,872 |  |  | $ | (214 | ) |  | $ | 14,690 |  |  | $ | (271 | )
Obligations of states and political subdivisions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 1,268 |  |  |  | (9 | ) |  |  | 9,394 |  |  |  | (166 | ) |  |  | 10,662 |  |  |  | (175 | )
Mortgage-backed securities in government-sponsored entities |  |  | 8,725 |  |  |  | (86 | ) |  |  | 6,685 |  |  |  | (186 | ) |  |  | 15,410 |  |  |  | (272 | )
Total |  | $ | 13,811 |  |  | $ | (152 | ) |  | $ | 26,951 |  |  | $ | (566 | ) |  | $ | 40,762 |  |  | $ | (718 | )

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