Note 3 - Loans Receivable - Impaired Loans (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Construction Loan Portfolio Segment [Member] \| Residential [Member]
Loans with no related allowance, recorded investment in loans	$ 771
Loans with no related allowance, unpaid principal balance	771
Loans with no related allowance, average balance total loans	494
Loans with no related allowance, interest income recognized	(17)
Real Estate Portfolio Segment [Member] \| Residential [Member]
Loans with no related allowance, recorded investment in loans		247
Loans with no related allowance, unpaid principal balance		247
Loans with no related allowance, average balance total loans		255
Loans with no related allowance, interest income recognized		13
Real Estate Portfolio Segment [Member] \| Commercial [Member]
Loans with no related allowance, recorded investment in loans	8,707	7,451
Loans with no related allowance, unpaid principal balance	9,488	7,627
Loans with no related allowance, average balance total loans	8,412	7,623
Loans with no related allowance, interest income recognized	173	291
Loans with an related allowance, recorded investment in loans	122	127
Loans with an related allowance, unpaid principal balance	122	127
Related Allowance	17	17
Loans with an related allowance, average balance total loans	125	135
Loans with an related allowance, interest income recognized
Land Acquisition Development And Commercial [Member] \| Residential [Member]
Loans with no related allowance, recorded investment in loans
Loans with no related allowance, unpaid principal balance
Loans with no related allowance, average balance total loans
Loans with no related allowance, interest income recognized
Commercial Industrial and Agricultural Portfolio Segment [Member]
Loans with no related allowance, recorded investment in loans	12	12
Loans with no related allowance, unpaid principal balance	12	12
Loans with no related allowance, average balance total loans	12	12
Loans with no related allowance, interest income recognized
Equity Lines Portfolio Segment [Member]
Loans with no related allowance, recorded investment in loans
Loans with no related allowance, unpaid principal balance
Loans with no related allowance, average balance total loans
Loans with no related allowance, interest income recognized
Consumer Portfolio Segment [Member]
Loans with no related allowance, recorded investment in loans
Loans with no related allowance, unpaid principal balance
Loans with no related allowance, average balance total loans
Loans with no related allowance, interest income recognized
Loans with no related allowance, recorded investment in loans	9,490	7,710
Loans with no related allowance, unpaid principal balance	10,271	7,886
Loans with no related allowance, average balance total loans	8,918	7,890
Loans with no related allowance, interest income recognized	156	304
Loans with an related allowance, recorded investment in loans	122	127
Loans with an related allowance, unpaid principal balance	122	127
Related Allowance	17	17
Loans with an related allowance, average balance total loans	125	135
Loans with an related allowance, interest income recognized

Amount of allowance for credit losses related to recorded investment.

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 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953550-111524

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- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

+ References

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- Definition

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524

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- Definition

Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

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- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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- Definition

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

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