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Note 3 - Securities - Securities Available-for-sale (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Securities available for sale, amortized cost | $ 108,586 | $ 104,650
Securities available for sale, gross unrealized gains | 3,607 | 970
Securities available for sale, gross unrealized losses | (2) | (302)
Securities available for sale | 112,191 | 105,318
US Government-sponsored Enterprises Debt Securities [Member] |  |
Securities available for sale, amortized cost | 15,621 | 16,579
Securities available for sale, gross unrealized gains | 395 | 163
Securities available for sale, gross unrealized losses |  | (6)
Securities available for sale | 16,016 | 16,736
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Securities available for sale, amortized cost | 92,965 | 88,071
Securities available for sale, gross unrealized gains | 3,212 | 807
Securities available for sale, gross unrealized losses | (2) | (296)
Securities available for sale | $ 96,175 | $ 88,582

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 + Details
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