Note 3 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Carrying balance of TDR	$ 1,887,159	$ 6,141,262
Residential Portfolio Segment [Member] | Real Estate Residential, One To Four Family Units [Member]
Carrying balance of TDR	176,576	1,178,876
Residential Portfolio Segment [Member] | Real Estate Residential, Multi Family Units [Member]
Carrying balance of TDR	0	0
Real Estate, Construction [Member]
Carrying balance of TDR	839,419	3,700,084
Commercial Real Estate Portfolio Segment [Member]
Carrying balance of TDR	592,515	893,992
Commercial Portfolio Segment [Member]
Carrying balance of TDR	$ 278,649	$ 368,310