Note 3 - Loans and Allowance for Loan Losses (Detail) - Allowance for Loan Losses Activity, by Portfolio Segment (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for loan losses:
Balance			$ 8,198
Provision for Loan Losses	1,583	4,896
Loans Charged Off	(5,136)	(10,422)	5,879
Recoveries	3,114	3,484	1,196
Residential Portfolio Segment [Member] \| Beginning Balance [Member]
Allowance for loan losses:
Balance		1,860	1,051
Residential Portfolio Segment [Member] \| Ending Balance [Member]
Allowance for loan losses:
Balance	1,329	1,860
Residential Portfolio Segment [Member]
Allowance for loan losses:
Provision for Loan Losses	395	2,642
Loans Charged Off	(1,066)	(2,034)
Recoveries	140	201
Commercial Real Estate Portfolio Segment [Member] \| Beginning Balance [Member]
Allowance for loan losses:
Balance		3,493	3,083
Commercial Real Estate Portfolio Segment [Member] \| Ending Balance [Member]
Allowance for loan losses:
Balance	3,946	3,493
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Provision for Loan Losses	2,367	932
Loans Charged Off	(1,949)	(1,913)
Recoveries	35	1,391
Commercial and Industrial [Member] \| Beginning Balance [Member]
Allowance for loan losses:
Balance		636	3,795
Commercial and Industrial [Member] \| Ending Balance [Member]
Allowance for loan losses:
Balance	783	636
Commercial and Industrial [Member]
Allowance for loan losses:
Provision for Loan Losses	(1,381)	439
Loans Charged Off	(499)	(4,725)
Recoveries	2,027	1,127
Consumer Portfolio Segment [Member] \| Beginning Balance [Member]
Allowance for loan losses:
Balance		1,355	1,457
Consumer Portfolio Segment [Member] \| Ending Balance [Member]
Allowance for loan losses:
Balance	847	1,355
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Provision for Loan Losses	202	883
Loans Charged Off	(1,622)	(1,750)
Recoveries	912	765
Beginning Balance [Member]
Allowance for loan losses:
Balance		7,344	9,386
Ending Balance [Member]
Allowance for loan losses:
Balance	$ 6,905	$ 7,344	$ 9,386

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A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(4)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

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- Definition

The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 168, 169, 170

-IssueDate 2006-05-01

-Chapter 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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