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Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Commercial and Industrial [Member] |  |  |  |
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items] |  |  |  |
Impaired loans, average recorded investment | $ 2,643 | $ 1,488 | $ 2,687 | $ 4,337
Impaired loans, interest income recognized | 15 | 21 | 70 | 80
Real Estate Construction [Member] |  |  |  |
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items] |  |  |  |
Impaired loans, average recorded investment | 3,850 | 446 | 3,499 | 616
Impaired loans, interest income recognized | 58 |  | 95 |
Residential Real Estate Mortgage [Member] |  |  |  |
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items] |  |  |  |
Impaired loans, average recorded investment | 5,274 | 2,872 | 4,937 | 574
Impaired loans, interest income recognized | 69 | 61 | 143 | 33
Commercial Real Estate Mortgage [Member] |  |  |  |
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items] |  |  |  |
Impaired loans, average recorded investment | 6,669 | 2,124 | 6,018 | 3,762
Impaired loans, interest income recognized | 106 | 98 | 216 | 35
Consumer Installment [Member] |  |  |  |
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items] |  |  |  |
Impaired loans, average recorded investment | 14 | 27 | 18 |
Impaired loans, interest income recognized | $ 1 |  | $ 1 |

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- Definition Average 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 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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