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Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Accounting Policies [Abstract] |
Composition of Loan Portfolio [Table Text Block] |
|  | % of Total Loans |
|  | 2015 |  |  | 2014 |
Residential real estate loans |  |  | 38.22 | % |  |  | 37.60 | %
Commercial real estate loans |  |  | 28.90 | % |  |  | 29.86 | %
Consumer loans |  |  | 18.89 | % |  |  | 18.42 | %
Commercial and industrial loans |  |  | 13.99 | % |  |  | 14.12 | %
|  |  | 100.00 | % |  |  | 100.00 | %

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