Note 1 - Nature of Operations and Summary of Significant Accounting Policies (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, Net, Ending Balance		2,026,910	$ 2,503,910
Cash Reserve Deposit Required and Made		0
Capital Conservation Buffer			2.50%
Cash, Uninsured Amount		70,900,000
Interest-bearing Deposits in Banks and Other Financial Institutions		142,056,538	$ 87,557,842
Federal Reserve Bank [Member]
Interest-bearing Deposits in Banks and Other Financial Institutions		65,100,000
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, Net, Ending Balance		$ 2,026,910	$ 2,503,910		$ 3,520,000