Note 4 - Loans and Allowance for Loan Losses (Details) - Loan Portfolio by Credit Quality - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Rating:
Loans receivable	$ 496,507,881	$ 497,147,333
Pass [Member]
Rating:
Loans receivable	459,287,000	463,666,000
Special Mention [Member]
Rating:
Loans receivable	12,744,000	9,243,000
Substandard [Member]
Rating:
Loans receivable	23,874,000	23,635,000
Doubtful [Member]
Rating:
Loans receivable	603,000	603,000
Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	52,132,057	45,462,895
Residential Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Rating:
Loans receivable	44,060,000	37,383,000
Residential Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Rating:
Loans receivable	0	0
Residential Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Rating:
Loans receivable	8,072,000	8,080,000
Residential Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member]
Rating:
Loans receivable	0	0
Residential Portfolio Segment [Member] | One-to-four Family Units [Member]
Rating:
Loans receivable	98,851,219	98,257,417
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Pass [Member]
Rating:
Loans receivable	92,170,000	91,267,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Special Mention [Member]
Rating:
Loans receivable	3,061,000	3,319,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Substandard [Member]
Rating:
Loans receivable	3,620,000	3,671,000
Residential Portfolio Segment [Member] | One-to-four Family Units [Member] | Doubtful [Member]
Rating:
Loans receivable	0	0
Residential Portfolio Segment [Member] | Multi-family Units [Member]
Rating:
Loans receivable	37,448,634	41,603,670
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Pass [Member]
Rating:
Loans receivable	37,449,000	41,604,000
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Special Mention [Member]
Rating:
Loans receivable	0	0
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Substandard [Member]
Rating:
Loans receivable	0	0
Residential Portfolio Segment [Member] | Multi-family Units [Member] | Doubtful [Member]
Rating:
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	203,407,488	208,824,573
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Rating:
Loans receivable	189,347,000	198,230,000
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Rating:
Loans receivable	7,566,000	3,657,000
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Rating:
Loans receivable	6,495,000	6,937,000
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Rating:
Loans receivable	0	0
Commercial Portfolio Segment [Member]
Rating:
Loans receivable	82,730,366	81,006,897
Commercial Portfolio Segment [Member] | Pass [Member]
Rating:
Loans receivable	74,610,000	73,407,000
Commercial Portfolio Segment [Member] | Special Mention [Member]
Rating:
Loans receivable	2,117,000	2,267,000
Commercial Portfolio Segment [Member] | Substandard [Member]
Rating:
Loans receivable	5,400,000	4,730,000
Commercial Portfolio Segment [Member] | Doubtful [Member]
Rating:
Loans receivable	603,000	603,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	21,938,117	21,991,881
Consumer Portfolio Segment [Member] | Other Loans [Member] | Pass [Member]
Rating:
Loans receivable	21,651,000	21,775,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Special Mention [Member]
Rating:
Loans receivable	0	0
Consumer Portfolio Segment [Member] | Other Loans [Member] | Substandard [Member]
Rating:
Loans receivable	287,000	217,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Doubtful [Member]
Rating:
Loans receivable	$ 0	$ 0