Note 3 - Acquisition (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 02, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Goodwill, Ending Balance		$ 2,615,352		$ 2,615,352
Net Income (Loss) Attributable to Parent, Total		(342,984)	$ 1,592,573	1,012,761	$ 3,021,814
Hometown Bancshares, Inc. [Member]
Net Income (Loss) Attributable to Parent, Total		$ 1,300,000	$ 163,000	$ 1,300,000	$ 163,000
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	178,785,000
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	$ 2,615,000