Note 5 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Carrying balance of TDR	$ 11,152,251	$ 11,309,930
Residential Portfolio Segment [Member] | Real Estate Residential, One To Four Family Units [Member]
Carrying balance of TDR	1,182,685	1,208,596
Residential Portfolio Segment [Member] | Real Estate Residential, Multi Family Units [Member]
Carrying balance of TDR
Real Estate, Construction [Member]
Carrying balance of TDR	3,920,410	4,088,409
Commercial Real Estate Portfolio Segment [Member]
Carrying balance of TDR	5,408,688	5,508,444
Commercial Portfolio Segment [Member]
Carrying balance of TDR	640,468	504,481
Consumer and Other Loans [Member]
Carrying balance of TDR