Note 4 - Loans and Allowance for Loan Losses - Loans By Category (Details) - USD ($)	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Residential Portfolio Segment [Member] \| One To Four Family Units [Member]
Loans receivable	$ 109,391,522		$ 98,257,417
Allowance for loan losses	(885,000)	$ (862,000)	(821,000)	$ (783,000)	$ (805,000)	$ (900,000)
Residential Portfolio Segment [Member] \| Multi Family Units [Member]
Loans receivable	38,192,064		41,603,670
Allowance for loan losses	(163,000)	(157,000)	(177,000)	(161,000)	(151,000)	(127,000)
Residential Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable	41,305,779		45,462,895
Allowance for loan losses	(1,996,000)	(1,668,000)	(1,246,000)	(2,268,000)	(1,346,000)	(1,330,000)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	238,722,021		208,824,573
Commercial Portfolio Segment [Member]
Loans receivable	81,739,377		81,006,897
Allowance for loan losses	(1,323,000)	(1,366,000)	(1,382,000)	(1,484,000)	(1,893,000)	(1,954,000)
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Loans receivable	23,261,945		21,991,881
Allowance for loan losses	(277,000)	(288,000)	(223,000)	(193,000)	(232,000)	(185,000)
Loans receivable	532,612,708		497,147,333
Allowance for loan losses	(6,396,580)	$ (6,181,000)	(5,811,940)	$ (6,822,000)	$ (6,651,000)	$ (6,589,000)
Deferred loan fees/costs, net	(353,184)		(333,486)
Net loans	$ 525,862,944		$ 491,001,907

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
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-Subparagraph (c)(1)
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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-Name Accounting Standards Codification
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