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Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Impaired Loans by Class (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Commercial and Industrial [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | $ 742 | $ 1,172
With no related allowance recorded - unpaid principal balance | 742 | 1,172
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 453 | 465
With an allowance recorded - unpaid principal balance | 453 | 465
With an allowance recorded - related allowance | 248 | 196
Total: |  |
Recorded investment | 1,195 | 1,637
Unpaid principal balance | 1,195 | 1,637
Related Allowance | 248 | 196
Real Estate Construction [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 203 | 4,250
With no related allowance recorded - unpaid principal balance | 203 | 4,250
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 217 | 271
With an allowance recorded - unpaid principal balance | 217 | 271
With an allowance recorded - related allowance | 125 | 125
Total: |  |
Recorded investment | 420 | 4,521
Unpaid principal balance | 420 | 4,521
Related Allowance | 125 | 125
Residential Real Estate Mortgage [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 2,667 | 3,188
With no related allowance recorded - unpaid principal balance | 2,668 | 3,193
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 267 | 0
With an allowance recorded - unpaid principal balance | 269 | 0
With an allowance recorded - related allowance | 266 | 0
Total: |  |
Recorded investment | 2,934 | 3,188
Unpaid principal balance | 2,937 | 3,193
Related Allowance | 266 | 0
Commercial Real Estate Mortgage [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 1,653 | 2,528
With no related allowance recorded - unpaid principal balance | 1,661 | 2,536
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 711 | 2,555
With an allowance recorded - unpaid principal balance | 712 | 2,560
With an allowance recorded - related allowance | 239 | 551
Total: |  |
Recorded investment | 2,364 | 5,083
Unpaid principal balance | 2,373 | 5,096
Related Allowance | 239 | 551
Consumer Installment [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 26 | 24
With no related allowance recorded - unpaid principal balance | 26 | 24
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 0 |
With an allowance recorded - unpaid principal balance | 0 |
With an allowance recorded - related allowance | 0 | 0
Total: |  |
Recorded investment | 26 | 24
Unpaid principal balance | 26 | 24
Related Allowance | $ 0 | $ 0

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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=7512638&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=7512638&loc=d3e5212-111524 + Details
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- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 + Details
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