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Note 2 - Securities (Details) - Securities Held to Maturity with Unrealized Losses - US States and Political Subdivisions Debt Securities [Member] - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Note 2 - Securities (Details) - Securities Held to Maturity with Unrealized Losses [Line Items] |  |
Less Than 12 Months - Fair Value | $ 995 | $ 1,171
Less Than 12 Months - Unrecognized Loss | $ (5) | (9)
12 Months or More - Fair Value |  | 2,916
12 Months or More - Unrecognized Loss |  | (180)
Fair Value | $ 995 | 4,087
Unrecognized Loss | $ (5) | $ (189)

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- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity 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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- Definition Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity in a continuous loss position. + 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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