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Note 4 - Loans And Related Allowance For Loan Losses (Detail) - Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | $ 3,688 | $ 1,702 |  |
Collectively evaluated for impairment | 4,091 | 5,117 |  |
Allowance balance | 7,779 | 6,819 |  |
Commercial and Industrial [Member] | End of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance | 1,732 | 1,296 | 1,234 |
Commercial and Industrial [Member] | Beginning of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance |  | 1,296 | 1,234 | 864
Charge-offs | (230) | (568) | (450) |
Recoveries | 71 | 76 | 40 |
Provision | 595 | 554 | 780 |
Commercial and Industrial [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 1,189 | 595 |  |
Collectively evaluated for impairment | 543 | 701 |  |
Real Estate Construction [Member] | End of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance | 1,123 | 438 | 356 |
Real Estate Construction [Member] | Beginning of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance |  | 438 | 356 |
Charge-offs | (135) | (6) |  |
Provision | 820 | 88 | 356 |
Real Estate Construction [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 933 | 237 |  |
Collectively evaluated for impairment | 190 | 201 |  |
Residential Real Estate Mortgage [Member] | End of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance | 2,872 | 3,731 | 3,392 |
Residential Real Estate Mortgage [Member] | Beginning of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance |  | 3,731 | 3,392 | 2,816
Charge-offs | (785) | (1,862) | (1,433) |
Recoveries | 31 | 122 |  |
Provision | (105) | 2,079 | 2,009 |
Residential Real Estate Mortgage [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 600 | 685 |  |
Collectively evaluated for impairment | 2,272 | 3,046 |  |
Commercial Real Estate Mortgage [Member] | End of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance | 1,991 | 1,306 | 1,143 |
Commercial Real Estate Mortgage [Member] | Beginning of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance |  | 1,306 | 1,143 | 1,198
Charge-offs | (123) | (265) | (428) |
Provision | 808 | 428 | 373 |
Commercial Real Estate Mortgage [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 960 | 185 |  |
Collectively evaluated for impairment | 1,031 | 1,121 |  |
Consumer Installment [Member] | End of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance | 61 | 48 | 96 |
Consumer Installment [Member] | Beginning of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance |  | 48 | 96 | 59
Charge-offs | (64) | (11) | (59) |
Recoveries | 27 | 27 | 34 |
Provision | 50 | (64) | 62 |
Consumer Installment [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 6 |  |  |
Collectively evaluated for impairment | 55 | 48 |  |
End of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance | 7,779 | 6,819 | 6,221 |
Beginning of Period [Member] |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Allowance balance |  | 6,819 | 6,221 | 4,937
Charge-offs | (1,337) | (2,712) | (2,370) |
Recoveries | 129 | 225 | 74 |
Provision | $ 2,168 | $ 3,085 | $ 3,580 |

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- Definition Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Reflects a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 8, 9 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph a(ii) -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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