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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Impaired Loans by Class (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
With no related allowance recorded:
Impaired loans with no related allowance recorded investment	$ 10,765	$ 9,284
Impaired loans with no related allowance unpaid principal balance	10,756	9,472
With an allowance recorded:
Impaired loans with related allowance recorded investment	4,767	9,681
Impaired loans with related allowance unpaid principal balance	4,764	9,720
Impaired loans, related allowance	1,759	1,807
Total:
Impaired loans recorded investment	15,532	18,965
Impaired loans unpaid principal balance	15,520	19,192
Impaired loans, related allowance	1,759	1,807
Commercial and Industrial [Member]
With no related allowance recorded:
Impaired loans with no related allowance recorded investment	1,217	1,357
Impaired loans with no related allowance unpaid principal balance	1,216	1,357
With an allowance recorded:
Impaired loans with related allowance recorded investment	350	534
Impaired loans with related allowance unpaid principal balance	350	534
Impaired loans, related allowance	79	179
Total:
Impaired loans recorded investment	1,567	1,891
Impaired loans unpaid principal balance	1,566	1,891
Impaired loans, related allowance	79	179
Real Estate Construction [Member]
With no related allowance recorded:
Impaired loans with no related allowance recorded investment	2,859	124
Impaired loans with no related allowance unpaid principal balance	2,859	124
With an allowance recorded:
Impaired loans with related allowance recorded investment	600	3,887
Impaired loans with related allowance unpaid principal balance	600	3,887
Impaired loans, related allowance	600	210
Total:
Impaired loans recorded investment	3,459	4,011
Impaired loans unpaid principal balance	3,459	4,011
Impaired loans, related allowance	600	210
Residential Real Estate Mortgage [Member]
With no related allowance recorded:
Impaired loans with no related allowance recorded investment	2,542	2,704
Impaired loans with no related allowance unpaid principal balance	2,538	2,892
With an allowance recorded:
Impaired loans with related allowance recorded investment	2,961	3,178
Impaired loans with related allowance unpaid principal balance	2,959	3,217
Impaired loans, related allowance	907	855
Total:
Impaired loans recorded investment	5,503	5,882
Impaired loans unpaid principal balance	5,497	6,109
Impaired loans, related allowance	907	855
Commercial Real Estate Mortgage [Member]
With no related allowance recorded:
Impaired loans with no related allowance recorded investment	4,147	5,093
Impaired loans with no related allowance unpaid principal balance	4,143	5,093
With an allowance recorded:
Impaired loans with related allowance recorded investment	849	2,082
Impaired loans with related allowance unpaid principal balance	848	2,082
Impaired loans, related allowance	170	563
Total:
Impaired loans recorded investment	4,996	7,175
Impaired loans unpaid principal balance	4,991	7,175
Impaired loans, related allowance	170	563
Consumer Installment [Member]
With no related allowance recorded:
Impaired loans with no related allowance recorded investment		6
Impaired loans with no related allowance unpaid principal balance		6
With an allowance recorded:
Impaired loans with related allowance recorded investment	7
Impaired loans with related allowance unpaid principal balance	7
Impaired loans, related allowance	3
Total:
Impaired loans recorded investment	7	6
Impaired loans unpaid principal balance	7	6
Impaired loans, related allowance	$ 3

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Amount of investment of impaired financing receivables with related allowance for credit losses and without 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 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524

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Amount of allowance for credit losses related to recorded investment.

+ 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 (a)(3)

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without 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 (a)(4)

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+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

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+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

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+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

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+ 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 (a)(4)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

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