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Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Commercial and Industrial [Member]
Total:
Impaired loans, average recorded investment	$ 2,558	$ 2,975
Impaired loans, interest income recognized	37	55
Real Estate Construction [Member]
Total:
Impaired loans, average recorded investment	3,719	3,772
Impaired loans, interest income recognized	41	37
Residential Real Estate Mortgage [Member]
Total:
Impaired loans, average recorded investment	5,239	5,642
Impaired loans, interest income recognized	57	74
Commercial Real Estate Mortgage [Member]
Total:
Impaired loans, average recorded investment	5,827	6,832
Impaired loans, interest income recognized	75	110
Consumer Installment [Member]
Total:
Impaired loans, average recorded investment	$ 15	$ 18

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- Definition

Average 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 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&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=28368275&loc=d3e5258-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ 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)(2)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

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