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Note 5 - Loans (Details) - Troubled Debt Restructuring - Accruing Troubled Debt Restructuring [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Note 5 - Loans (Details) - Troubled Debt Restructuring [Line Items] |  |  |
No. of Loans | 28 | 14 | 25
Pre-Modification Recorded Investment | $ 19,906 | $ 25,071 | $ 28,852
Post-Modification Recorded Investment | 19,759 | 25,071 | 27,608
Specific Reserve | 752 | $ 5,600 | 982
Charge-offs | $ 148 |  | $ 1,244
Commercial Portfolio Segment [Member] |  |  |
Note 5 - Loans (Details) - Troubled Debt Restructuring [Line Items] |  |  |
No. of Loans | 3 | 4 | 9
Pre-Modification Recorded Investment | $ 1,181 | $ 10,539 | $ 12,026
Post-Modification Recorded Investment | 1,181 | 10,539 | 10,860
Specific Reserve | $ 2 | $ 21 | 550
Charge-offs |  |  | $ 1,166
Commercial Real Estate Portfolio Segment [Member] |  |  |
Note 5 - Loans (Details) - Troubled Debt Restructuring [Line Items] |  |  |
No. of Loans | 20 | 3 | 5
Pre-Modification Recorded Investment | $ 17,204 | $ 11,817 | $ 13,090
Post-Modification Recorded Investment | 17,204 | 11,817 | 13,090
Specific Reserve | $ 708 | $ 5,550 | $ 329
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |
Note 5 - Loans (Details) - Troubled Debt Restructuring [Line Items] |  |  |
No. of Loans | 5 | 7 | 11
Pre-Modification Recorded Investment | $ 1,521 | $ 2,715 | $ 3,736
Post-Modification Recorded Investment | 1,374 | 2,715 | 3,658
Specific Reserve | 42 | $ 29 | 103
Charge-offs | $ 148 |  | $ 78

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- Definition Number of 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 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + 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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