Note 4 - Loans and Allowance for Loan Losses - Loan Portfolio By Credit Quality (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Pass [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	$ 45,622,000	$ 37,383,000
Pass [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	99,152,000	91,267,000
Pass [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	36,895,000	41,604,000
Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	214,407,000	198,230,000
Pass [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	76,750,000	73,407,000
Pass [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	23,270,000	21,775,000
Pass [Member]
Rating:
Loans receivable	496,096,000	463,666,000
Special Mention [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable
Special Mention [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	2,941,000	3,319,000
Special Mention [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	5,928,000	3,657,000
Special Mention [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	4,201,000	2,267,000
Special Mention [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable
Special Mention [Member]
Rating:
Loans receivable	13,070,000	9,243,000
Substandard [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	7,728,000	8,080,000
Substandard [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	3,521,000	3,671,000
Substandard [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	2,406,000	6,937,000
Substandard [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	1,541,000	4,730,000
Substandard [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	478,000	217,000
Substandard [Member]
Rating:
Loans receivable	15,674,000	23,635,000
Doubtful [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable
Doubtful [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable
Doubtful [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable
Doubtful [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	620,000	603,000
Doubtful [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable
Doubtful [Member]
Rating:
Loans receivable	620,000	603,000
Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	53,350,379	45,462,895
Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	105,614,341	98,257,417
Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	36,894,514	41,603,670
Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	222,741,281	208,824,573
Commercial Portfolio Segment [Member]
Rating:
Loans receivable	83,112,278	81,006,897
Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	23,747,537	21,991,881
Loans receivable	$ 525,460,330	$ 497,147,333