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Note 11 - Fair Value and Interest Rate Risk (Details) - Quantitative Information About Level 3 Fair Value Measurements - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
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Jun. 30, 2015 | Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impaired loans |  | $ 11,938 | $ 11,724
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Impaired loans |  | $ 528 | $ 859
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Fair Value of Collateral Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Range, percent |  | 14.00% | 8.00%
Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Fair Value of Collateral Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Range, percent | [1] |  |
[1] | The range and weighted average of qualitative factors such as economic conditions and estimated liquidation expenses are presented as a percent of the appraised value.

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- Definition Ratio of the appraised fair value of impaired loans produced by qualitative factors such as economic conditions and estimated liquidation expenses. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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=49124121&loc=SL6953550-111524 + Details
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