Note 3 - Loans and Allowance for Loan Losses - Loan Portfolio By Credit Quality (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Rating:
Loans receivable	$ 544,398,300	$ 497,147,333
Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	40,912,307	45,462,895
Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	106,410,559	98,257,417
Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	48,483,523	41,603,670
Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	249,580,873	208,824,573
Commercial Portfolio Segment [Member]
Rating:
Loans receivable	75,404,732	81,006,897
Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	23,606,306	21,991,881
Pass [Member]
Rating:
Loans receivable	518,988,000	463,666,000
Pass [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	35,465,000	37,383,000
Pass [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	100,367,000	91,267,000
Pass [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	48,483,000	41,604,000
Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	242,200,000	198,230,000
Pass [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	69,093,000	73,407,000
Pass [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	23,380,000	21,775,000
Special Mention [Member]
Rating:
Loans receivable	13,016,000	9,243,000
Special Mention [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	0	0
Special Mention [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	2,591,000	3,319,000
Special Mention [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	0	0
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	5,922,000	3,657,000
Special Mention [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	4,503,000	2,267,000
Special Mention [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	0	0
Substandard [Member]
Rating:
Loans receivable	11,810,000	23,635,000
Substandard [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	5,447,000	8,080,000
Substandard [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	3,453,000	3,671,000
Substandard [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	0	0
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	1,459,000	6,937,000
Substandard [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	1,225,000	4,730,000
Substandard [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	226,000	217,000
Doubtful [Member]
Rating:
Loans receivable	584,000	603,000
Doubtful [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Rating:
Loans receivable	0	0
Doubtful [Member] | Residential Portfolio Segment [Member] | One To Four Family Units [Member]
Rating:
Loans receivable	0	0
Doubtful [Member] | Residential Portfolio Segment [Member] | Multi Family Units [Member]
Rating:
Loans receivable	0	0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member]
Rating:
Loans receivable	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member]
Rating:
Loans receivable	584,000	603,000
Doubtful [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member]
Rating:
Loans receivable	$ 0	$ 0