Note 6 - Goodwill and Other Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Apr. 02, 2018
Goodwill, Ending Balance	$ 1,434,982		$ 1,434,982
Business Acquisition, Goodwill, Expected Tax Deductible Amount		$ 0
Finite-Lived Intangible Assets, Gross, Total	3,520,000		3,520,000
Hometown Bancshares, Inc. [Member]
Goodwill, Ending Balance	$ 1,434,982		$ 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, Gross, Total				$ 3,500,000