Note 3 - Loans and Allowance for Loan Losses (Details) - Loans by Aging - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Real estate - residential mortgage:
Loans receivable, past due	$ 2,689,000	$ 1,105,000
Loans receivable, current	494,458,000	492,332,000
Loans receivable	497,147,333	493,437,064
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	90,000	136,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	176,000	463,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	2,423,000	506,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member]
Real estate - residential mortgage:
Loans receivable, past due	273,000	820,000
Loans receivable, current	97,984,000	97,081,000
Loans receivable	98,257,417	97,900,814
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	0	113,000
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	168,000	428,000
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	105,000	279,000
Residential Portfolio Segment [Member] | Multi-family Units [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	0
Loans receivable, current	41,604,000	33,786,000
Loans receivable	41,603,670	33,785,959
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	45,463,000	36,785,000
Loans receivable	45,462,895	36,784,584
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	1,079,000	0
Loans receivable, current	207,745,000	215,605,000
Loans receivable	208,824,573	215,605,054
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	0	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	1,079,000	0
Commercial Portfolio Segment [Member]
Real estate - residential mortgage:
Loans receivable, past due	1,327,000	227,000
Loans receivable, current	79,680,000	91,887,000
Loans receivable	81,006,897	92,114,216
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	88,000	0
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	0	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	227,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Real estate - residential mortgage:
Loans receivable, past due	10,000	58,000
Loans receivable, current	21,982,000	17,188,000
Loans receivable	21,991,881	17,246,437
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	23,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Real estate - residential mortgage:
Loans receivable, past due	8,000	35,000
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	$ 0	$ 0