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Note 6 - Investment Securities Available for Sale (Details) - Gross Unrealized Losses and Fair Value - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
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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 | $ 32,143 | $ 2,406
Less than Twelve Months, Gross Unrealized Losses | (205) | (10)
Twelve Months or Greater, Fair Value | 31,682 | 50,740
Twelve Months or Greater, Gross Unrealized Losses | (863) | (1,227)
Total, Fair Value | 63,825 | 53,146
Total, Gross Unrealized Losses | (1,068) | (1,237)
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 | 2,745 |
Less than Twelve Months, Gross Unrealized Losses | (54) |
Twelve Months or Greater, Fair Value | 12,791 | 15,734
Twelve Months or Greater, Gross Unrealized Losses | (210) | (450)
Total, Fair Value | 15,536 | 15,734
Total, Gross Unrealized Losses | (264) | (450)
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 | 19,988 | 2,406
Less than Twelve Months, Gross Unrealized Losses | (139) | (10)
Twelve Months or Greater, Fair Value | 11,586 | 18,232
Twelve Months or Greater, Gross Unrealized Losses | (525) | (543)
Total, Fair Value | 31,574 | 20,638
Total, Gross Unrealized Losses | (664) | (553)
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 | 9,410 |
Less than Twelve Months, Gross Unrealized Losses | (12) |
Twelve Months or Greater, Fair Value | 7,305 | 16,774
Twelve Months or Greater, Gross Unrealized Losses | (128) | (234)
Total, Fair Value | 16,715 | 16,774
Total, Gross Unrealized Losses | $ (140) | $ (234)

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