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Subsequent Events [Text Block] | 9 Months Ended
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Sep. 30, 2016
Subsequent Events [Text Block] | NOTE 9—PROPOSED ACQUISITION OF LIBERTY BANK, N.A. On July 28, 2016 Middlefield Banc Corp. and Liberty Bank, N.A. entered into an Agreement and Plan of Reorganization. Under the agreement Liberty Bank, N.A. will merge into The Middlefield Banking Company. Of the total merger consideration payable to shareholders of Liberty Bank, N.A., the merger agreement provides that 45% will consist of Middlefield Banc Corp. common stock and the remainder will be cash, for cash of approximately $37.96 per share or Middlefield Banc Corp. common stock at a fixed ratio of 1.1934 for each share of Liberty Bank, N.A. stock exchanged for Middlefield Banc Corp. stock. Liberty Bank, N.A.’s outstanding equity-based awards will be surrendered for total cash currently estimated at approximately $1.147 million. The merger agreement also provides that Liberty Bank, N.A. will pay to its shareholders before merger closing a special dividend in an amount of approximately $3.0 million, subject to possible upward adjustment. Middlefield Banc Corp. owns 23,218 shares of Liberty Bank, N.A. stock, or approximately 2.4%. Those shares will be cancelled in the merger for no consideration.

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References No definition available. + Details
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