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Note 3 - Acquisition (Details Textual) - USD ($)
Apr. 02, 2018
Jun. 30, 2019
Dec. 31, 2018
Goodwill, Ending Balance   $ 1,434,982 $ 1,434,982
Hometown Bancshares, Inc. [Member]      
Business Acquisition, Share Price $ 20    
Business Combination, Consideration Transferred, Total $ 4,628,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total 179,965,000    
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net 143,919,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits 161,248,000    
Goodwill, Ending Balance $ 1,435,000   $ 1,400,000