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Note 6 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2024 | Jul. 31, 2023 | Jul. 31, 2024 | Jul. 31, 2023
Effective Income Tax Rate Reconciliation, Percent | 23.00% | 45.00% | 25.00% | 97.00%
Undistributed Earnings of Foreign Subsidiaries | $ 0.7 |  | $ 0.7 |

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