Note 9 - Subsequent Events	9 Months Ended
Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	NOTE 9 – SUBSEQUENT EVENTS On October 2, 2015 Middlefield Banc Corp. and Eric D. Hovde entered into an agreement for the repurchase by Middlefield Banc Corp. of the 196,635 shares of Middlefield Banc Corp. common stock held by Mr. Hovde. Those shares constituted approximately 9.5% of the outstanding common stock, having made Mr. Hovde the single largest holder of our stock. The purchase price agreed to was $34.50 per share in cash. With funds borrowed under existing lines of credit and under an additional line of credit from an unaffiliated local bank, Middlefield Banc Corp. completed the repurchase on Monday, October 5, 2015. Mr. Hovde acquired the shares in April of 2012 under the terms of an August 15, 2011 Stock Purchase Agreement, as amended, between Middlefield Banc Corp. and Mr. Hovde’s affiliate, Bank Opportunity Fund LLC. The Stock Purchase Agreement and the associated Amended and Restated Purchaser’s Rights and Voting Agreement, also as amended, granted to Mr. Hovde the right to designate one director to serve on the board of directors of Middlefield Banc Corp. and on the board of directors of our subsidiary bank. Middlefield Banc Corp. and Mr. Hovde agreed that, effective upon completion of the repurchase of Mr. Hovde’s shares, the Stock Purchase Agreement and the Purchaser’s Rights and Voting Agreement were terminated.

Note 9 - Subsequent Events

9 Months Ended

Sep. 30, 2015

NOTE 9 – SUBSEQUENT EVENTS

On October 2, 2015 Middlefield Banc Corp. and Eric D. Hovde entered into an agreement for the repurchase by Middlefield Banc Corp. of the 196,635 shares of Middlefield Banc Corp. common stock held by Mr. Hovde. Those shares constituted approximately 9.5% of the outstanding common stock, having made Mr. Hovde the single largest holder of our stock. The purchase price agreed to was $34.50 per share in cash. With funds borrowed under existing lines of credit and under an additional line of credit from an unaffiliated local bank, Middlefield Banc Corp. completed the repurchase on Monday, October 5, 2015.

Mr. Hovde acquired the shares in April of 2012 under the terms of an August 15, 2011 Stock Purchase Agreement, as amended, between Middlefield Banc Corp. and Mr. Hovde’s affiliate, Bank Opportunity Fund LLC. The Stock Purchase Agreement and the associated Amended and Restated Purchaser’s Rights and Voting Agreement, also as amended, granted to Mr. Hovde the right to designate one director to serve on the board of directors of Middlefield Banc Corp. and on the board of directors of our subsidiary bank. Middlefield Banc Corp. and Mr. Hovde agreed that, effective upon completion of the repurchase of Mr. Hovde’s shares, the Stock Purchase Agreement and the Purchaser’s Rights and Voting Agreement were terminated.