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Note 4 - Loans and Related Allowance for Loan Losses (Details) - Impaired Loans by Class - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
With an allowance recorded: |  |
Recorded investment, with related allowance | $ 6,215 | $ 4,249
Unpaid principal balance, with related allowance | 6,199 | 4,246
Related allowance | 833 | 1,596
Total: |  |
Recorded investment | 13,681 | 14,368
Unpaid principal balance | 13,653 | 14,353
Related allowance | 833 | 1,596
Commercial and Industrial [Member] |  |
With no related allowance recorded: |  |
Recorded investment, with no related allowance | 1,027 | 1,146
Unpaid principal balance, with no related allowance | 1,025 | 1,145
With an allowance recorded: |  |
Recorded investment, with related allowance | 781 | 247
Unpaid principal balance, with related allowance | 781 | 247
Related allowance | 388 | 83
Total: |  |
Recorded investment | 1,808 | 1,393
Unpaid principal balance | 1,806 | 1,392
Related allowance | 388 | 83
Real Estate Construction Porfolio Segment [Member] |  |
With no related allowance recorded: |  |
Recorded investment, with no related allowance | 1,657 | 2,707
Unpaid principal balance, with no related allowance | 1,651 | 2,705
With an allowance recorded: |  |
Recorded investment, with related allowance | 130 | 589
Unpaid principal balance, with related allowance | 130 | 589
Related allowance | 130 | 589
Total: |  |
Recorded investment | 1,787 | 3,296
Unpaid principal balance | 1,781 | 3,294
Related allowance | 130 | 589
Real Estate Mortgage Portfolio Segment [Member] |  |
With no related allowance recorded: |  |
Recorded investment, with no related allowance | 7,466 | 10,119
Unpaid principal balance, with no related allowance | 7,454 | 10,107
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] |  |
With no related allowance recorded: |  |
Recorded investment, with no related allowance | 2,445 | 2,202
Unpaid principal balance, with no related allowance | 2,443 | 2,197
With an allowance recorded: |  |
Recorded investment, with related allowance | 1,436 | 2,981
Unpaid principal balance, with related allowance | 1,436 | 2,978
Related allowance | 276 | 892
Total: |  |
Recorded investment | 3,881 | 5,183
Unpaid principal balance | 3,879 | 5,175
Related allowance | 276 | 892
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member] |  |
With no related allowance recorded: |  |
Recorded investment, with no related allowance | 2,337 | 4,064
Unpaid principal balance, with no related allowance | 2,335 | 4,060
With an allowance recorded: |  |
Recorded investment, with related allowance | 3,862 | 426
Unpaid principal balance, with related allowance | 3,846 | 426
Related allowance | 39 | 30
Total: |  |
Recorded investment | 6,199 | 4,490
Unpaid principal balance | 6,181 | 4,486
Related allowance | 39 | 30
Consumer Portfolio Segment [Member] |  |
With an allowance recorded: |  |
Recorded investment, with related allowance | 6 | 6
Unpaid principal balance, with related allowance | 6 | 6
Related allowance | 0 | 2
Total: |  |
Recorded investment | 6 | 6
Unpaid principal balance | 6 | 6
Related allowance | $ 0 | $ 2

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