Note 3 - Loans and Allowance for Loan Losses - Non-accruing Loans (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Nonaccruing loans	$ 9,725,540	$ 18,628,598
Residential Portfolio Segment [Member] | Real Estate Residential, One To Four Family Units [Member]
Nonaccruing loans	1,470,357	3,086,159
Residential Portfolio Segment [Member] | Real Estate Residential, Multi Family Units [Member]
Nonaccruing loans	0	0
Real Estate, Construction [Member]
Nonaccruing loans	2,891,243	6,239,326
Commercial Real Estate Portfolio Segment [Member]
Nonaccruing loans	3,339,996	3,932,241
Commercial Portfolio Segment [Member]
Nonaccruing loans	1,934,494	5,249,782
Consumer and Other Loans [Member]
Nonaccruing loans	$ 89,450	$ 121,090