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Note 3 - Debt Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Jan. 01, 2021 | [1] | Dec. 31, 2020
--- | --- | --- | --- | ---
Securities available for sale, due within one year, amortized cost | $ 8,117 |  |
Securities available for sale, due after one year but within five years, amortized cost | 21,978 |  |
Securities available for sale, due after five years but within ten years, amortized cost | 8,905 |  |
Securities available for sale, due after ten years, amortized cost | 0 |  |
Securities available for sale, single maturity date, amortized cost | 39,000 |  |
Securities available for sale, amortized cost | 76,273 |  | $ 81,958
Securities available for sale, due within one year, fair value | 8,108 |  |
Securities available for sale, due after one year but within five years, fair value | 22,084 |  |
Securities available for sale, due after five years but within ten years, fair value | 8,987 |  |
Securities available for sale, due after ten years, fair value | 0 |  |
Securities available for sale, single maturity date, fair value | 39,179 |  |
Securities available for sale | 76,292 | $ 83,358 | 83,358
US Government Agencies Debt Securities [Member] |  |  |
Securities available for sale, due within one year, amortized cost | 0 |  |
Securities available for sale, due after one year but within five years, amortized cost | 0 |  |
Securities available for sale, due after five years but within ten years, amortized cost | 469 |  |
Securities available for sale, due after ten years, amortized cost | 0 |  |
Securities available for sale, single maturity date, amortized cost | 469 |  |
Securities available for sale, amortized cost | 469 |  | 555
Securities available for sale, due within one year, fair value | 0 |  |
Securities available for sale, due after one year but within five years, fair value | 0 |  |
Securities available for sale, due after five years but within ten years, fair value | 466 |  |
Securities available for sale, due after ten years, fair value | 0 |  |
Securities available for sale, single maturity date, fair value | 466 |  |
Securities available for sale | 466 |  | 551
US States and Political Subdivisions Debt Securities [Member] |  |  |
Securities available for sale, due within one year, amortized cost | 735 |  |
Securities available for sale, due after one year but within five years, amortized cost | 19,425 |  |
Securities available for sale, due after five years but within ten years, amortized cost | 8,436 |  |
Securities available for sale, due after ten years, amortized cost | 0 |  |
Securities available for sale, single maturity date, amortized cost | 28,596 |  |
Securities available for sale, amortized cost | 28,596 |  | 43,950
Securities available for sale, due within one year, fair value | 736 |  |
Securities available for sale, due after one year but within five years, fair value | 19,537 |  |
Securities available for sale, due after five years but within ten years, fair value | 8,521 |  |
Securities available for sale, due after ten years, fair value | 0 |  |
Securities available for sale, single maturity date, fair value | 28,794 |  |
Securities available for sale | 28,794 |  | $ 44,459
Corporate Debt Securities [Member] |  |  |
Securities available for sale, due within one year, amortized cost | 7,382 |  |
Securities available for sale, due after one year but within five years, amortized cost | 2,553 |  |
Securities available for sale, due after five years but within ten years, amortized cost | 0 |  |
Securities available for sale, due after ten years, amortized cost | 0 |  |
Securities available for sale, single maturity date, amortized cost | 9,935 |  |
Securities available for sale, amortized cost | 9,935 |  |
Securities available for sale, due within one year, fair value | 7,372 |  |
Securities available for sale, due after one year but within five years, fair value | 2,547 |  |
Securities available for sale, due after five years but within ten years, fair value | 0 |  |
Securities available for sale, due after ten years, fair value | 0 |  |
Securities available for sale, single maturity date, fair value | 9,919 |  |
Securities available for sale | 9,919 |  |
Collateralized Mortgage Backed Securities [Member] |  |  |
Securities available for sale, no single maturity date, amortized cost | 37,273 |  |
Securities available for sale, no single maturity date, fair value | $ 37,113 |  |
[1] | Per our analysis no ACL was necessary for investment securities available for sale.

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