Note 5 - Intangible Assets (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Goodwill, Ending Balance	$ 1,434,982	$ 1,434,982
Finite-Lived Intangible Assets, Gross, Total	3,520,000	$ 3,520,000
Hometown Bancshares, Inc. [Member]
Goodwill, Ending Balance	1,400,000
Hometown Bancshares, Inc. [Member] | Core Deposits [Member]
Finite-Lived Intangible Assets, Gross, Total	$ 3,500,000
Finite-Lived Intangible Asset, Useful Life (Year)	7 years