Note 4 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
TDRs, carrying balance	$ 12,729,580	$ 13,149,615
Residential Portfolio Segment [Member] | One To Four Family Units [Member]
TDRs, carrying balance	1,345,609	1,564,468
Residential Portfolio Segment [Member] | Multi Family Units [Member]
TDRs, carrying balance
Residential Portfolio Segment [Member] | Construction Loans [Member]
TDRs, carrying balance	5,364,770	5,446,895
Commercial Real Estate Portfolio Segment [Member]
TDRs, carrying balance	5,736,849	5,736,849
Commercial Portfolio Segment [Member]
TDRs, carrying balance	282,352	401,403
Consumer Portfolio Segment [Member] | Other Loans [Member]
TDRs, carrying balance