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Note 8 - Fair Value - Financial Assets At Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Securities | $ 20,751 | $ 23,829
Certificates of Deposit [Member] |  |
Securities | 12,389 | 15,117
US States and Political Subdivisions Debt Securities [Member] |  |
Securities | 407 | 409
Residential Mortgage Backed Securities [Member] |  |
Securities | 5,926 | 6,108
Collateralized Mortgage Backed Securities [Member] |  |
Securities | 2,029 | 2,195
Fair Value, Inputs, Level 1 [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Residential Mortgage Backed Securities [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Backed Securities [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Securities | 20,751 | 23,829
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member] |  |
Securities | 12,389 | 15,117
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Securities | 407 | 409
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member] |  |
Securities | 5,926 | 6,108
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member] |  |
Securities | 2,029 | 2,195
Fair Value, Inputs, Level 3 [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities [Member] |  |
Securities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Backed Securities [Member] |  |
Securities | $ 0 | $ 0

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- Definition Amount 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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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