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Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Impaired Loans by Class (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
With no related allowance recorded:
With no related allowance recorded - recorded investment	$ 4,376	$ 11,162
With no related allowance recorded - unpaid principal balance	4,385	11,175
With an allowance recorded:
With an allowance recorded - recorded Investment	12,857	7,074
With an allowance recorded - unpaid principal balance	12,876	7,090
With an allowance recorded - related allowance	2,975	1,702
Total:
Recorded investment	17,233	18,237
Unpaid principal balance	17,261	18,266
Related Allowance	2,975	1,702
Commercial and Industrial [Member]
With no related allowance recorded:
With no related allowance recorded - recorded investment	978	1,172
With no related allowance recorded - unpaid principal balance	978	1,172
With an allowance recorded:
With an allowance recorded - recorded Investment	2,896	658
With an allowance recorded - unpaid principal balance	2,899	658
With an allowance recorded - related allowance	840	203
Total:
Recorded investment	3,874	1,830
Unpaid principal balance	3,877	1,831
Related Allowance	840	203
Real Estate Construction [Member]
With no related allowance recorded:
With no related allowance recorded - recorded investment	203	4,250
With no related allowance recorded - unpaid principal balance	203	4,250
With an allowance recorded:
With an allowance recorded - recorded Investment	3,986	271
With an allowance recorded - unpaid principal balance	3,986	271
With an allowance recorded - related allowance	442	125
Total:
Recorded investment	4,189	4,521
Unpaid principal balance	4,189	4,521
Related Allowance	442	125
Residential Real Estate Mortgage [Member]
With no related allowance recorded:
With no related allowance recorded - recorded investment	1,859	3,188
With no related allowance recorded - unpaid principal balance	1,863	3,193
With an allowance recorded:
With an allowance recorded - recorded Investment	2,451	1,813
With an allowance recorded - unpaid principal balance	2,458	1,817
With an allowance recorded - related allowance	556	547
Total:
Recorded investment	4,310	5,001
Unpaid principal balance	4,321	5,010
Related Allowance	556	547
Commercial Real Estate Mortgage [Member]
With no related allowance recorded:
With no related allowance recorded - recorded investment	1,306	2,528
With no related allowance recorded - unpaid principal balance	1,311	2,536
With an allowance recorded:
With an allowance recorded - recorded Investment	3,524	4,332
With an allowance recorded - unpaid principal balance	3,533	4,344
With an allowance recorded - related allowance	1,137	827
Total:
Recorded investment	4,830	6,861
Unpaid principal balance	4,844	6,880
Related Allowance	1,137	827
Consumer Installment [Member]
With no related allowance recorded:
With no related allowance recorded - recorded investment	30	24
With no related allowance recorded - unpaid principal balance	30	24
With an allowance recorded:
With an allowance recorded - related allowance	0	0
Total:
Recorded investment	30	24
Unpaid principal balance	30	24
Related Allowance	$ 0	$ 0

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- Definition

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=7512638&loc=SL6953550-111524

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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=7512638&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=7512638&loc=d3e5212-111524

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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 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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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=7512638&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)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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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=7512638&loc=d3e5212-111524

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