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Note 3 - Debt Securities - Held to Maturity Securities in Continuous Unrealized Loss Position (Details) $ in Thousands | Dec. 31, 2018 USD ($)
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Securities held to maturity, less than 12 months fair value |
Securities held to maturity, less than 12 months unrealized losses |
Securities held to maturity, 12 months or longer fair value | 24,990
Securities held to maturity, 12 months or longer unrealized losses | (23)
Securities held to maturity, total fair value | 24,990
Securities held to maturity, unrealized losses | (23)
US Government Agencies Debt Securities [Member] |
Securities held to maturity, less than 12 months fair value |
Securities held to maturity, less than 12 months unrealized losses |
Securities held to maturity, 12 months or longer fair value | 17,867
Securities held to maturity, 12 months or longer unrealized losses | (20)
Securities held to maturity, total fair value | 17,867
Securities held to maturity, unrealized losses | (20)
Corporate Debt Securities [Member] |
Securities held to maturity, less than 12 months fair value |
Securities held to maturity, less than 12 months unrealized losses |
Securities held to maturity, 12 months or longer fair value | 7,123
Securities held to maturity, 12 months or longer unrealized losses | (3)
Securities held to maturity, total fair value | 7,123
Securities held to maturity, unrealized losses | $ (3)

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized 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 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months. + 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 Reference 2: 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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