Note 4 - Loans and Allowance for Loan Losses - Nonaccruing Loans (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Nonaccruing loans	$ 9,716,422	$ 8,631,639
Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Nonaccruing loans	1,847,293	2,060,180
Residential Portfolio Segment [Member] | Multi Family Units [Member]
Nonaccruing loans
Residential Portfolio Segment [Member] | Construction Loans [Member]
Nonaccruing loans	5,364,771	5,446,896
Commercial Real Estate Portfolio Segment [Member]
Nonaccruing loans	827,272	161,491
Commercial Portfolio Segment [Member]
Nonaccruing loans	1,670,686	925,281
Consumer Portfolio Segment [Member] | Other Loans [Member]
Nonaccruing loans	$ 6,400	$ 37,791