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Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items] |  |
Less than Twelve Months, Fair Value | $ 5,411 | $ 59,255
Less than Twelve Months, Gross Unrealized Losses | (25) | (4,608)
Twelve Months or Greater, Fair Value | 54,488 | 15,092
Twelve Months or Greater, Gross Unrealized Losses | (2,242) | (1,386)
Total, Fair Value | 59,899 | 74,347
Total, Gross Unrealized Losses | (2,267) | (5,994)
US Government Agencies Debt Securities [Member] |  |
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items] |  |
Less than Twelve Months, Fair Value |  | 13,130
Less than Twelve Months, Gross Unrealized Losses |  | (929)
Twelve Months or Greater, Fair Value | 15,636 | 7,166
Twelve Months or Greater, Gross Unrealized Losses | (684) | (732)
Total, Fair Value | 15,636 | 20,295
Total, Gross Unrealized Losses | (684) | (1,661)
US States and Political Subdivisions Debt Securities [Member] | Taxable [Member] |  |
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items] |  |
Less than Twelve Months, Fair Value |  | 1,301
Less than Twelve Months, Gross Unrealized Losses |  | (38)
Total, Fair Value |  | 1,301
Total, Gross Unrealized Losses |  | (38)
US States and Political Subdivisions Debt Securities [Member] | Tax-exempt [Member] |  |
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items] |  |
Less than Twelve Months, Fair Value |  | 26,743
Less than Twelve Months, Gross Unrealized Losses |  | (2,883)
Twelve Months or Greater, Fair Value |  | 2,678
Twelve Months or Greater, Gross Unrealized Losses |  | (383)
Total, Fair Value |  | 29,421
Total, Gross Unrealized Losses |  | (3,267)
US States and Political Subdivisions Debt Securities [Member] |  |
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items] |  |
Less than Twelve Months, Fair Value | 4,343 |
Less than Twelve Months, Gross Unrealized Losses | (20) |
Twelve Months or Greater, Fair Value | 19,145 |
Twelve Months or Greater, Gross Unrealized Losses | (1,099) |
Total, Fair Value | 23,488 |
Total, Gross Unrealized Losses | (1,119) |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Note 6 - Investment Securities Available For Sale (Details) - Gross Unrealized Losses and Fair Value [Line Items] |  |
Less than Twelve Months, Fair Value | 1,068 | 18,082
Less than Twelve Months, Gross Unrealized Losses | (5) | (757)
Twelve Months or Greater, Fair Value | 19,707 | 5,248
Twelve Months or Greater, Gross Unrealized Losses | (459) | (271)
Total, Fair Value | 20,775 | 23,330
Total, Gross Unrealized Losses | $ (464) | $ (1,028)

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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