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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 | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 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 | $ 2,085 | $ 2,535 | $ 2,286 | $ 2,170
Impaired loans, interest income recognized | 8 | 139 | 78 | 170
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 | 3,731 | 2,305 | 3,654 | 2,400
Impaired loans, interest income recognized | 43 |  | 138 | 113
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 | 5,351 | 3,622 | 5,213 | 3,764
Impaired loans, interest income recognized | 81 | 85 | 224 | 169
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 | 6,403 | 3,597 | 6,275 | 3,985
Impaired loans, interest income recognized | 138 | 200 | 355 | 324
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 | 13 | 13 | 15 | 27
Impaired loans, interest income recognized |  | $ 1 | $ 1 | $ 2

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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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