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Note 2 - Investment Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Securities available for sale, amortized cost, due in one year or less | $ 201 |
Securities available for sale, fair value, due in one year or less | 201 |
Securities held to maturity, amortized cost, due in one year or less | 0 |
Securities held to maturity, fair value, due in one year or less | 0 |
Securities available for sale, amortized cost, due after one year through five years | 200,587 |
Securities available for sale, fair value, due after one year through five years | 191,701 |
Securities held to maturity, amortized cost, due after one year through five years | 0 |
Securities held to maturity, fair value, due after one year through five years | 0 |
Securities available for sale, amortized cost, due after five years through ten years | 52,276 |
Securities available for sale, fair value, due after five years through ten years | 50,378 |
Securities held to maturity, amortized cost, due after five years through ten years | 2,000 |
Securities held to maturity, fair value, due after five years through ten years | 1,894 |
Securities available for sale, amortized cost, due after ten years | 97,118 |
Securities available for sale, fair value, due after ten years | 90,196 |
Securities held to maturity, amortized cost, due after ten years | 5,000 |
Securities held to maturity, fair value, due after ten years | 4,739 |
Securities available for sale, amortized cost, single maturity | 350,182 |
Securities available for sale, fair value, single maturity | 332,476 |
Securities held to maturity, amortized cost, single maturity | 7,000 |
Securities held to maturity, fair value, single maturity | 6,633 |
Mortgage-backed securities and CMO, amortized cost | 110,785 |
Mortgage-backed securities and CMO, fair value | 105,692 |
Mortgage-backed securities and CMO, amortized cost | 0 |
Mortgage-backed securities and CMO, fair value | 0 |
Securities available for sale, amortized cost | 460,967 | $ 445,220
Securities available for sale, fair value | 438,168 | 447,335
Securities held to maturity, amortized cost | 7,000 | 2,000
Securities held to maturity, fair value | $ 6,633 | $ 2,004

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