Note 4 - Loans and Allowance for Loan Losses (Details) - Loans by Aging - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Real estate - residential mortgage:
Loans receivable, past due	$ 8,866,000	$ 2,689,000
Loans receivable, current	487,642,000	494,458,000
Loans receivable	496,507,881	497,147,333
Loans receivable, past due and accruing	0	0
Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	6,343,000	90,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	123,000	176,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	2,400,000	2,423,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member]
Real estate - residential mortgage:
Loans receivable, past due	741,000	273,000
Loans receivable, current	98,110,000	97,984,000
Loans receivable	98,851,219	98,257,417
Loans receivable, past due and accruing	0	0
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	549,000	0
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	97,000	168,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	95,000	105,000
Residential Portfolio Segment [Member] | Multi-family Units [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Loans receivable, current	37,449,000	41,604,000
Loans receivable	37,448,634	41,603,670
Loans receivable, past due and accruing	0	0
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Loans receivable, current	52,132,000	45,463,000
Loans receivable	52,132,057	45,462,895
Loans receivable, past due and accruing	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Commercial Real Estate Portfolio Segment [Member]
Real estate - residential mortgage:
Loans receivable, past due	6,708,000	1,079,000
Loans receivable, current	196,700,000	207,745,000
Loans receivable	203,407,488	208,824,573
Loans receivable, past due and accruing	0	0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	5,688,000	0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	1,020,000	1,079,000
Commercial Portfolio Segment [Member]
Real estate - residential mortgage:
Loans receivable, past due	1,349,000	1,327,000
Loans receivable, current	81,381,000	79,680,000
Loans receivable	82,730,366	81,006,897
Loans receivable, past due and accruing	0	0
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	104,000	88,000
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	6,000	0
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	1,239,000	1,239,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Real estate - residential mortgage:
Loans receivable, past due	68,000	10,000
Loans receivable, current	21,870,000	21,982,000
Loans receivable	21,938,117	21,991,881
Loans receivable, past due and accruing	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	2,000	2,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	20,000	8,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	$ 46,000	$ 0