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Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Classes of the Loan Portfolio Summarized by Credit Quality (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable	$ 409,175	$ 401,880
Pass [Member] | Commercial and Industrial [Member]
Financing Receivable	60,439	53,645
Pass [Member] | Real Estate Construction [Member]
Financing Receivable	16,913	20,883
Pass [Member] | Residential Real Estate Mortgage [Member]
Financing Receivable	191,710	192,534
Pass [Member] | Commercial Real Estate Mortgage [Member]
Financing Receivable	104,030	100,536
Pass [Member] | Consumer Installment [Member]
Financing Receivable	4,208	4,495
Pass [Member]
Financing Receivable	377,300	372,093
Special Mention [Member] | Commercial and Industrial [Member]
Financing Receivable	407	1,104
Special Mention [Member] | Residential Real Estate Mortgage [Member]
Financing Receivable	868	1,100
Special Mention [Member] | Commercial Real Estate Mortgage [Member]
Financing Receivable	2,176	443
Special Mention [Member] | Consumer Installment [Member]
Financing Receivable	2	6
Special Mention [Member]
Financing Receivable	3,453	2,653
Substandard [Member] | Commercial and Industrial [Member]
Financing Receivable	4,477	4,363
Substandard [Member] | Real Estate Construction [Member]
Financing Receivable	4,409	662
Substandard [Member] | Residential Real Estate Mortgage [Member]
Financing Receivable	12,855	14,505
Substandard [Member] | Commercial Real Estate Mortgage [Member]
Financing Receivable	6,661	7,523
Substandard [Member] | Consumer Installment [Member]
Financing Receivable	20	8
Substandard [Member]
Financing Receivable	28,422	27,061
Doubtful [Member] | Commercial and Industrial [Member]
Financing Receivable		73
Doubtful [Member]
Financing Receivable		73
Commercial and Industrial [Member]
Financing Receivable	65,323	59,185
Real Estate Construction [Member]
Financing Receivable	21,322	21,545
Residential Real Estate Mortgage [Member]
Financing Receivable	205,433	208,139
Commercial Real Estate Mortgage [Member]
Financing Receivable	112,867	108,502
Consumer Installment [Member]
Financing Receivable	$ 4,230	$ 4,509

X

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph e

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.



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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 116

-IssueDate 2006-05-01

-Chapter 8

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522



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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-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.

+ Details

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant