Note 6 - Goodwill and Other Intangible Assets (Details Textual) - USD ($)		12 Months Ended
	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 02, 2018
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		$ 1,434,982	$ 1,434,982	$ 1,400,000	$ 1,400,000
Hometown Bancshares, Inc. [Member] | Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years	7 years
Finite-Lived Intangible Assets, Gross, Total	$ 3,500,000