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Note 7 - Investment and Equity Securities - Gross Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Less than Twelve Months, Fair Value |  | $ 22,519
Less than Twelve Months, Gross Unrealized Losses |  | (295)
Twelve Months or Greater, Fair Value | 12,940 | 27,415
Twelve Months or Greater, Gross Unrealized Losses | (157) | (754)
Total, Fair Value | 12,940 | 49,934
Total, Gross Unrealized Losses | (157) | (1,049)
US Government Agencies Debt Securities [Member] |  |
Less than Twelve Months, Fair Value |  |
Less than Twelve Months, Gross Unrealized Losses |  |
Twelve Months or Greater, Fair Value | 1,995 | 4,105
Twelve Months or Greater, Gross Unrealized Losses | (5) | (61)
Total, Fair Value | 1,995 | 4,105
Total, Gross Unrealized Losses | (5) | (61)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Less than Twelve Months, Fair Value |  | 2,068
Less than Twelve Months, Gross Unrealized Losses |  | (9)
Twelve Months or Greater, Fair Value | 10,945 | 12,257
Twelve Months or Greater, Gross Unrealized Losses | (152) | (506)
Total, Fair Value | 10,945 | 14,325
Total, Gross Unrealized Losses | $ (152) | (515)
Nontaxable Municipal Bonds [Member] |  |
Less than Twelve Months, Fair Value |  | 20,451
Less than Twelve Months, Gross Unrealized Losses |  | (286)
Twelve Months or Greater, Fair Value |  | 11,053
Twelve Months or Greater, Gross Unrealized Losses |  | (187)
Total, Fair Value |  | 31,504
Total, Gross Unrealized Losses |  | $ (473)

X
- 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 No definition available. + Details
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X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563 + Details
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X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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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 less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
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- Details
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- Details
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