Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance recorded, recorded investment	$ 3,490	$ 3,931
Impaired loans with no related allowance recorded, unpaid principal balance	4,001	4,498
Impaired loans with an allowance recorded, recorded investment	1,262	1,000
Impaired loans with an allowance recorded, unpaid principal balance	2,436	2,173
Impaired loans with an allowance recorded, related allowance	362	100
Recorded Investment	4,752	4,931
Unpaid Principal Balance	6,437	6,671
Related Allowance	362	100
Commercial Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance recorded, recorded investment	10,940	11,002
Impaired loans with no related allowance recorded, unpaid principal balance	13,278	13,253
Impaired loans with an allowance recorded, recorded investment	6,880	9,773
Impaired loans with an allowance recorded, unpaid principal balance	10,619	12,482
Impaired loans with an allowance recorded, related allowance	1,183	1,396
Recorded Investment	17,820	20,775
Unpaid Principal Balance	23,897	25,735
Related Allowance	1,183	1,396
Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance recorded, recorded investment	2,035	2,483
Impaired loans with no related allowance recorded, unpaid principal balance	2,498	2,947
Recorded Investment	2,035	2,483
Unpaid Principal Balance	2,498	2,947
Residential Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance recorded, recorded investment	324
Impaired loans with no related allowance recorded, unpaid principal balance	324
Recorded Investment	324
Unpaid Principal Balance	324
Consumer Installment And Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with no related allowance recorded, recorded investment	1,418	2,014
Impaired loans with no related allowance recorded, unpaid principal balance	1,525	2,133
Recorded Investment	1,418	2,014
Unpaid Principal Balance	$ 1,525	$ 2,133

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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=28368275&loc=SL6953550-111524

+ Details

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- Definition

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)

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

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- Definition

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)

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

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- Definition

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

+ References

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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

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=28368275&loc=d3e5212-111524

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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.

+ 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=28368275&loc=d3e5212-111524

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