Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2019	Apr. 02, 2018	Dec. 31, 2015
Goodwill, Ending Balance	$ 1,434,982
Finite-Lived Intangible Assets, Net, Ending Balance	2,980,910
Cash Reserve Deposit Required and Made	$ 1,956,000
Capital Conservation Buffer	1.875%					0.00%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	30,000	68,500
Scenario, Forecast [Member]
Capital Conservation Buffer				2.50%
Hometown Bancshares, Inc. [Member]
Goodwill, Ending Balance	$ 1,434,982				$ 1,435,000
Hometown Bancshares, Inc. [Member] | Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life	7 years
Finite-Lived Intangible Assets, Net, Ending Balance	$ 2,980,910				$ 3,520,000