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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Impaired Loans by Class (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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With no related allowance recorded: |  |
Impaired loans with no related allowance recorded investment | $ 10,765 | $ 9,284
Impaired loans with no related allowance unpaid principal balance | 10,756 | 9,472
With an allowance recorded: |  |
Impaired loans with related allowance recorded investment | 4,767 | 9,681
Impaired loans with related allowance unpaid principal balance | 4,764 | 9,720
Impaired loans, related allowance | 1,759 | 1,807
Total: |  |
Impaired loans recorded investment | 15,532 | 18,965
Impaired loans unpaid principal balance | 15,520 | 19,192
Impaired loans, related allowance | 1,759 | 1,807
Commercial and Industrial [Member] |  |
With no related allowance recorded: |  |
Impaired loans with no related allowance recorded investment | 1,217 | 1,357
Impaired loans with no related allowance unpaid principal balance | 1,216 | 1,357
With an allowance recorded: |  |
Impaired loans with related allowance recorded investment | 350 | 534
Impaired loans with related allowance unpaid principal balance | 350 | 534
Impaired loans, related allowance | 79 | 179
Total: |  |
Impaired loans recorded investment | 1,567 | 1,891
Impaired loans unpaid principal balance | 1,566 | 1,891
Impaired loans, related allowance | 79 | 179
Real Estate Construction [Member] |  |
With no related allowance recorded: |  |
Impaired loans with no related allowance recorded investment | 2,859 | 124
Impaired loans with no related allowance unpaid principal balance | 2,859 | 124
With an allowance recorded: |  |
Impaired loans with related allowance recorded investment | 600 | 3,887
Impaired loans with related allowance unpaid principal balance | 600 | 3,887
Impaired loans, related allowance | 600 | 210
Total: |  |
Impaired loans recorded investment | 3,459 | 4,011
Impaired loans unpaid principal balance | 3,459 | 4,011
Impaired loans, related allowance | 600 | 210
Residential Real Estate Mortgage [Member] |  |
With no related allowance recorded: |  |
Impaired loans with no related allowance recorded investment | 2,542 | 2,704
Impaired loans with no related allowance unpaid principal balance | 2,538 | 2,892
With an allowance recorded: |  |
Impaired loans with related allowance recorded investment | 2,961 | 3,178
Impaired loans with related allowance unpaid principal balance | 2,959 | 3,217
Impaired loans, related allowance | 907 | 855
Total: |  |
Impaired loans recorded investment | 5,503 | 5,882
Impaired loans unpaid principal balance | 5,497 | 6,109
Impaired loans, related allowance | 907 | 855
Commercial Real Estate Mortgage [Member] |  |
With no related allowance recorded: |  |
Impaired loans with no related allowance recorded investment | 4,147 | 5,093
Impaired loans with no related allowance unpaid principal balance | 4,143 | 5,093
With an allowance recorded: |  |
Impaired loans with related allowance recorded investment | 849 | 2,082
Impaired loans with related allowance unpaid principal balance | 848 | 2,082
Impaired loans, related allowance | 170 | 563
Total: |  |
Impaired loans recorded investment | 4,996 | 7,175
Impaired loans unpaid principal balance | 4,991 | 7,175
Impaired loans, related allowance | 170 | 563
Consumer Installment [Member] |  |
With no related allowance recorded: |  |
Impaired loans with no related allowance recorded investment |  | 6
Impaired loans with no related allowance unpaid principal balance |  | 6
With an allowance recorded: |  |
Impaired loans with related allowance recorded investment | 7 |
Impaired loans with related allowance unpaid principal balance | 7 |
Impaired loans, related allowance | 3 |
Total: |  |
Impaired loans recorded investment | 7 | 6
Impaired loans unpaid principal balance | 7 | 6
Impaired loans, related allowance | $ 3 |

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
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