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Note 3 - Securities - Securities with Gross Unrealized Losses Not Recognized in Income (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
--- | --- | ---
Estimated fair value, less than 12 months | $ 18,792 | $ 13,226
Unrealized losses, less than 12 months | (62) | (76)
Estimated fair value, 12 months or longer | 929 | 16,141
Unrealized losses, 12 months or longer | (1,253) | (1,191)
Estimated fair value, total | 19,721 | 29,367
Unrealized losses, total | $ (1,315) | $ (1,267)
Unrealized losses, less than 12 months, number of securities | 8 | 11
Unrealized losses, 12 months or longer, number of securities | 2 | 17
Unrealized losses, total, number of securities | 10 | 28
US Government-sponsored Enterprises Debt Securities [Member] |  |
Estimated fair value, less than 12 months | $ 4,975 | $ 0
Unrealized losses, less than 12 months | (24) | 0
Estimated fair value, 12 months or longer | 0 | 0
Unrealized losses, 12 months or longer | 0 | 0
Estimated fair value, total | 4,975 | 0
Unrealized losses, total | (24) | 0
Collateralized Mortgage Obligations and Residential Mortgage Backed Securities [Member] |  |
Estimated fair value, less than 12 months | 11,953 | 8,859
Unrealized losses, less than 12 months | (36) | (31)
Estimated fair value, 12 months or longer | 0 | 15,065
Unrealized losses, 12 months or longer | 0 | (65)
Estimated fair value, total | 11,953 | 23,924
Unrealized losses, total | (36) | (96)
US States and Political Subdivisions Debt Securities [Member] |  |
Estimated fair value, less than 12 months | 1,864 | 4,367
Unrealized losses, less than 12 months | (2) | (45)
Estimated fair value, 12 months or longer | 0 | 0
Unrealized losses, 12 months or longer | 0 | 0
Estimated fair value, total | 1,864 | 4,367
Unrealized losses, total | (2) | (45)
Collateralized Debt Obligations [Member] |  |
Estimated fair value, less than 12 months | 0 | 0
Unrealized losses, less than 12 months | 0 | 0
Estimated fair value, 12 months or longer | 929 | 1,076
Unrealized losses, 12 months or longer | (1,253) | (1,126)
Estimated fair value, total | 929 | 1,076
Unrealized losses, total | $ (1,253) | $ (1,126)

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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- 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=121645371&loc=d3e27337-111563 + Details
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- 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 Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References No definition available. + Details
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- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 + Details
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