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Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2020
Income Tax Expense (Benefit), Total | $ 454 | $ 591 |
Effective Income Tax Rate Reconciliation, Percent, Total | 12.00% | 50.60% |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
State and Local Jurisdiction [Member] |  |  |
Open Tax Year | 2016 2017 2018 2019 2020 2021 |  |
Foreign Tax Authority [Member] |  |  |
Open Tax Year | 2016 2017 2018 2019 2020 2021 |  |
Tax Year 2019 [Member] |  |  |
Proceeds from Income Tax Refunds | $ 200 |  | $ 6,400
Tax Year 2018 [Member] |  |  |
Proceeds from Income Tax Refunds | $ 7,600 |  | $ 3,200

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