Note 8 - Loans and Allowance for Credit Losses - Nonaccrual Loans and Loans Past Due Over 90 Days (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Residential Portfolio Segment [Member] | One- to Four-family Loan [Member]
Nonaccrual Loans	$ 2,310,070	$ 2,982,386
Loans Past Due Over 90 Days Still Accruing	0	0
Residential Portfolio Segment [Member] | Multi-family Loans [Member]
Nonaccrual Loans	0	0
Loans Past Due Over 90 Days Still Accruing	0	0
Nonresidential Real Estate Portfolio Segment [Member]
Nonaccrual Loans	1,880,189	2,069,922
Loans Past Due Over 90 Days Still Accruing	0	0
Commercial Portfolio Segment [Member]
Nonaccrual Loans	0	0
Loans Past Due Over 90 Days Still Accruing	0	0
Consumer Portfolio Segment [Member]
Nonaccrual Loans	0	0
Loans Past Due Over 90 Days Still Accruing	0	0
Purchased Auto Loans [Member]
Nonaccrual Loans	12,569	3,069
Loans Past Due Over 90 Days Still Accruing	0	0
Nonaccrual Loans	4,202,828	5,055,377
Loans Past Due Over 90 Days Still Accruing	$ 0	$ 0