Note 3 - Loans and Allowance for Loan Losses - Loans by Aging (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Loans receivable, past due	$ 1,596,000	$ 2,689,000
Loans receivable, current	542,802,000	494,458,000
Loans receivable	544,398,300	497,147,333
Loans receivable, past due and accruing
Residential Portfolio Segment [Member] \| One To Four Family Units [Member]
Loans receivable, past due	965,000	273,000
Loans receivable, current	105,446,000	97,984,000
Loans receivable	106,410,559	98,257,417
Loans receivable, past due and accruing
Residential Portfolio Segment [Member] \| Multi Family Units [Member]
Loans receivable, past due
Loans receivable, current	48,483,000	41,604,000
Loans receivable	48,483,523	41,603,670
Loans receivable, past due and accruing
Residential Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable, past due
Loans receivable, current	40,912,000	45,463,000
Loans receivable	40,912,307	45,462,895
Loans receivable, past due and accruing
Commercial Real Estate Portfolio Segment [Member]
Loans receivable, past due		1,079,000
Loans receivable, current	249,581,000	207,745,000
Loans receivable	249,580,873	208,824,573
Loans receivable, past due and accruing
Commercial Portfolio Segment [Member]
Loans receivable, past due	593,000	1,327,000
Loans receivable, current	74,812,000	79,680,000
Loans receivable	75,404,732	81,006,897
Loans receivable, past due and accruing
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Loans receivable, past due	38,000	10,000
Loans receivable, current	23,568,000	21,982,000
Loans receivable	23,606,306	21,991,881
Loans receivable, past due and accruing
Financing Receivables, 30 to 59 Days Past Due [Member]
Loans receivable, past due	367,000	90,000
Financing Receivables, 30 to 59 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| One To Four Family Units [Member]
Loans receivable, past due	367,000
Financing Receivables, 30 to 59 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| Multi Family Units [Member]
Loans receivable, past due
Financing Receivables, 30 to 59 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable, past due
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans receivable, past due
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans receivable, past due		88,000
Financing Receivables, 30 to 59 Days Past Due [Member] \| Consumer Portfolio Segment [Member] \| Other Loans [Member]
Loans receivable, past due		2,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Loans receivable, past due	495,000	176,000
Financing Receivables, 60 to 89 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| One To Four Family Units [Member]
Loans receivable, past due	495,000	168,000
Financing Receivables, 60 to 89 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| Multi Family Units [Member]
Loans receivable, past due
Financing Receivables, 60 to 89 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable, past due
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans receivable, past due
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans receivable, past due
Financing Receivables, 60 to 89 Days Past Due [Member] \| Consumer Portfolio Segment [Member] \| Other Loans [Member]
Loans receivable, past due		8,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans receivable, past due	734,000	2,423,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| One To Four Family Units [Member]
Loans receivable, past due	103,000	105,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| Multi Family Units [Member]
Loans receivable, past due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Residential Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable, past due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans receivable, past due		1,079,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Portfolio Segment [Member]
Loans receivable, past due	593,000	1,239,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Consumer Portfolio Segment [Member] \| Other Loans [Member]
Loans receivable, past due	$ 38,000

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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- Definition

Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522

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