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Note 2 - Investment Securities (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Note 2 - Investment Securities (Details) [Line Items] |  |  |  |  |
Number of Securities | 529 |  | 529 |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 259 |  | 259 |  |
Aggregate Depreciation From Amortized Cost Basis, Percent |  |  | 4.00% |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | 98 |  | 98 |  |
Equity Securities [Member] |  |  |  |  |
Note 2 - Investment Securities (Details) [Line Items] |  |  |  |  |
Percentage of Investment Portfolio |  |  | 1.00% |  | 1.00%
Other than Temporary Impairment Losses, Investments | $ 0 | $ 0 | $ 0 | $ 0 |
Debt Securities [Member] |  |  |  |  |
Note 2 - Investment Securities (Details) [Line Items] |  |  |  |  |
Other than Temporary Impairment Losses, Investments | $ 0 | $ 0 | $ 0 | $ 0 |

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