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Note 3 - Securities - Amortized Cost and Fair Value of Securities By Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Due in one year or less, amortized cost | $ 31,282 |
Due in one year or less, fair value | 30,943 |
Due after one year through five years, amortized cost | 171,156 |
Due after one year through five years | 162,943 |
Amortized cost, single maturity date, amortized cost | 202,438 |
Fair value, single maturity date | 193,886 |
Amortized cost | 207,971 | $ 85,585
Fair value | 199,339 | 85,694
Residential Mortgage-Backed Securities [Member] |  |
Amortized cost, without single maturity date, amortized cost | 4,246 |
Fair value, without single maturity date | 4,181 |
Amortized cost | 4,246 | 4,660
Fair value | 4,181 | 4,833
Collateralized Mortgage-Backed Securities [Member] |  |
Amortized cost, without single maturity date, amortized cost | 1,287 |
Fair value, without single maturity date | 1,272 |
Amortized cost | 1,287 | 1,576
Fair value | $ 1,272 | $ 1,580

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