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Note 14 - Employee Benefit Plans - Summary of Fair Values of Pension Plan Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Fair value of plan assets | $ 21,808 | $ 22,843 | $ 30,051
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 10,628 | 11,339 |
Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | 11,180 | 11,504 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 2,222 | 2,365 |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | 0 | 0 |
Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 2,354 | 1,671 |
Defined Benefit Plan, Equity Securities, US, Large Cap [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | 0 | 0 |
Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 301 | 566 |
Defined Benefit Plan, Equity Securities, US, Mid Cap [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | 0 | 0 |
Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 175 | 209 |
Defined Benefit Plan, Equity Securities, US, Small Cap [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | 0 | 0 |
Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 873 | 1,194 |
Defined Benefit Plan, Equity Securities, Non-US [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | 0 | 0 |
Real Estate [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets |  | 210 |
Real Estate [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets |  | 0 |
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets |  | 106 |
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets |  | 0 |
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of plan assets | 4,703 | 5,018 |
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of plan assets | $ 11,180 | $ 11,504 |

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