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Note 8 - Fair Value - Financial Assets At Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Securities | $ 14,693 | $ 23,829
Certificates of Deposit [Member] |  |
Securities | 7,441 | 15,117
US States and Political Subdivisions Debt Securities [Member] |  |
Securities | 402 | 409
Residential Mortgage Backed Securities [Member] |  |
Securities | 5,121 | 6,108
Collateralized Mortgage Backed Securities [Member] |  |
Securities | 1,729 | 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 | 14,693 | 23,829
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member] |  |
Securities | 7,441 | 15,117
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Securities | 402 | 409
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member] |  |
Securities | 5,121 | 6,108
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member] |  |
Securities | 1,729 | 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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