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Note 4 - Loans and Related Allowance for Loan Losses (Details) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Commercial and Industrial [Member] |  |  |
Total: |  |  |
Impaired loans, average recorded investment | $ 2,187 | $ 2,776 | $ 1,637
Impaired loans, interest income recognized | 119 | 348 | 58
Real Estate Construction [Member] |  |  |
Total: |  |  |
Impaired loans, average recorded investment | 3,743 | 2,798 | 4,521
Impaired loans, interest income recognized | 183 | 156 | 216
Residential Real Estate Mortgage [Member] |  |  |
Total: |  |  |
Impaired loans, average recorded investment | 5,380 | 4,263 | 3,188
Impaired loans, interest income recognized | 293 | 338 | 157
Commercial Real Estate Mortgage [Member] |  |  |
Total: |  |  |
Impaired loans, average recorded investment | 6,500 | 4,717 | 5,083
Impaired loans, interest income recognized | 493 | 543 | 97
Consumer Installment [Member] |  |  |
Total: |  |  |
Impaired loans, average recorded investment | 13 | 27 | 24
Impaired loans, interest income recognized | $ 1 | $ 3 | $ 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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