Note 3 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details)	12 Months Ended
Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Number of loans	2	16
Pre-modification outstanding recorded balance	$ 5,741,189	$ 9,146,742
Post-modification outstanding recorded balance	$ 5,741,189	$ 7,934,375
Residential Portfolio Segment [Member] \| One To Four Family Units [Member]
Number of loans		7
Pre-modification outstanding recorded balance		$ 1,345,358
Post-modification outstanding recorded balance		$ 1,345,358
Residential Portfolio Segment [Member] \| Multi Family Units [Member]
Number of loans
Pre-modification outstanding recorded balance
Post-modification outstanding recorded balance
Residential Portfolio Segment [Member] \| Construction Loans [Member]
Number of loans		5
Pre-modification outstanding recorded balance		$ 6,889,044
Post-modification outstanding recorded balance		$ 5,655,969
Commercial Real Estate Portfolio Segment [Member]
Number of loans	1	1
Pre-modification outstanding recorded balance	$ 5,575,358	$ 161,491
Post-modification outstanding recorded balance	$ 5,575,358	$ 161,491
Commercial Portfolio Segment [Member]
Number of loans	1	3
Pre-modification outstanding recorded balance	$ 165,831	$ 750,849
Post-modification outstanding recorded balance	$ 165,831	$ 771,557
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Number of loans
Pre-modification outstanding recorded balance
Post-modification outstanding recorded balance

Number of financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524

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