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Note 9 - Subsequent Event (Details Textual) - Merger of Liberty Bank, N.A. into The Middlefield Banking Company [member] - USD ($) $ / shares in Units, $ in Thousands | 2 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Jul. 28, 2016
Scenario, Forecast [Member] |  |
Payments to Acquire Businesses, Gross | $ 1,147 |
Liberty Bank, N.A. [Member] |  |
Business Combination, Merger Agreement, Special Dividend to Be Paid to Entity's Shareholders Before Merger |  | $ 3,000
Business Combination, Merger Agreement, Percentage of Merger Consideration to Be Paid in Common Stock |  | 45.00%
Business Combination, Merger Agreement, Cash Per Share of Reporting Entity Common Stock |  | $ 37.96
Business Combination, Merger Agreement, Ratio of Shares of Reporting Entity's Common Stock for Each Share of Acquired Entity's Common Stock |  | 1.1934
Business Combination, Shares in Acquired Entity Owned Prior to Merger |  | 23,218
Business Combination, Ownership Percentage in Acquired Entity Prior to Merger |  | 2.40%

X
- Definition Represents the cash paid, or to be paid, per share of the reporting entity's common stock. + References No definition available. + Details
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X
- Definition Represents the percentage of the total merger consideration that is to be paid in the form of common stock. + References No definition available. + Details
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- Definition Represents the ratio of the shares of the reporting entity's common stock for each share of the acquired entity's common stock. + References No definition available. + Details
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- Definition Represents the amount of a special dividend to be paid by the specified entity to its shareholders prior to the merger, in accordance with the merger agreement. + References No definition available. + Details
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- Definition Represents the percentage of the acquired entity's stock owned by the reporting entity prior to a merger. + References No definition available. + Details
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- Definition Represents the number of shares of the acquired entity's stock owned by the reporting entity prior to a merger. + References No definition available. + Details
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X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Details
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- Details
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- Details
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