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Note 12 - Fair Value and Interest Rate Risk (Details) - Quantitative Information About Level 3 Fair Value Measurements - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2016 | Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair value (in Dollars) |  | $ 16,581 | $ 12,851
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value of Collateral Approach [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Fair value (in Dollars) | [1],[2],[3] | $ 2,240 | $ 363
Range | [1],[2],[3] |  | 8.00%
Weighted average | [1],[2],[3] |  | (8.00%)
Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value of Collateral Approach [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Range | [1],[2],[3] | 14.00% |
Weighted average | [1],[2],[3] | (14.00%) |
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value of Collateral Approach [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Range | [1],[2],[3] | 23.00% |
Weighted average | [1],[2],[3] | (23.00%) |
Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value of Collateral Approach [Member] |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Range | [1],[2],[3] | 16.00% | 8.00%
Weighted average | [1],[2],[3] | (16.00%) | (8.00%)
[1] | Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.
[2] | Fair value is generally determined through independent appraisals of the underlying collateral, which include Level 3 inputs that are not identifiable.
[3] | 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=66008989&loc=SL6953550-111524 + Details
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