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Note 7 - Fair Value Measurements - Level 3 Fair Value Measurements (Details) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2017 | Dec. 31, 2016
Impaired loans [Member] | Present Value of Cash Flows [Member] | Minimum [Member] |  |  |
Discount rate |  | 6.75% | 6.75%
Impaired loans [Member] | Present Value of Cash Flows [Member] | Maximum [Member] |  |  |
Discount rate |  | 8.00% | 8.00%
Impaired loans [Member] | Present Value of Cash Flows [Member] | Weighted Average [Member] |  |  |
Discount rate |  | 7.35% | 7.35%
Other Real Estate Owned [Member] | Discounted Appraised Value [Member] | Minimum [Member] |  |  |
Discount rate |  | 0.00% | 0.00%
Selling cost | [1] | 2.91% | 2.91%
Other Real Estate Owned [Member] | Discounted Appraised Value [Member] | Maximum [Member] |  |  |
Discount rate |  | 53.46% | 53.46%
Selling cost |  | 8.60% | 8.60%
Other Real Estate Owned [Member] | Discounted Appraised Value [Member] | Weighted Average [Member] |  |  |
Discount rate |  | 8.58% | 13.66%
Selling cost |  | 4.93% | 6.48%
[1] | The Company markets other real estate owned both independently and with local realtors. Properties marketed by realtors are discounted by selling costs. Properties that the Company markets independently are not discounted by selling costs.

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- Definition Refers to the rate of selling cost. + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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