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Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012 | Dec. 31, 2011
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance | $ 7,952 | $ 8,168 | $ 7,952 | $ 8,168 | $ 8,291 | $ 8,349 | $ 8,063 | $ 8,068
Nonaccrual Designation as Impaired Threshold |  |  | 250 |  |  |  |  |
Threshold period for considering loans as special mention or classified |  |  | 75 days |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 7,756 | 5,798 | 7,756 | 5,798 |  | 4,246 |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | (730) | (1,028) | (1,484) | (1,728) |  |  |  |
Financing Receivable Modifications Impairment Accrued | 10 | 197 | 10 | 244 |  |  |  |
Portion Based on Historical Loss Rates [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance | 3,525 |  | 3,525 |  |  |  |  |
Portion Based on Historical Loss Rates Under Former Methodology [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance | 2,695 |  | 2,695 |  |  |  |  |
Portion Based on Historical Loss Rates Applied to Non-classified Loans [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance | 2,687 |  | 2,687 |  |  |  |  |
Portion Based on Historical Loss Rates Applied to Classified Loans [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance | 838 |  | 838 |  |  |  |  |
Consumer Real Estate [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs |  | $ 109 |  |  |  |  |  |
Special Mention [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Increase in percentage of allocation |  |  | 50.00% |  |  |  |  |
Classified Loans [Member] |  |  |  |  |  |  |  |
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items] |  |  |  |  |  |  |  |
Increase in percentage of allocation |  |  | 100.00% |  |  |  |  |

X
- Definition Represents the amount of investment in troubled debt restructures that exceeds fair value, as determined by the impairment measurement, as of the end of the period. + References No definition available. + Details
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X
- Definition Refers to increase in percentage of allocation for internal and external factors used for estimating credit risk for non-impaired loans. + References No definition available. + Details
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- Definition Nonaccrual designation as impaired threshold. + References No definition available. + Details
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- Definition Represents the threshold period for considering loans as special mention or classified. + References No definition available. + Details
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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=28368275&loc=SL6953423-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + 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 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 2: 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 3: 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 4: 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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