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Note 6 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2025 | Oct. 31, 2024 | Oct. 31, 2025 | Oct. 31, 2024
Effective Income Tax Rate Reconciliation, Percent | 27.00% | 32.00% | 29.00% | 28.00%
Undistributed Earnings of Foreign Subsidiaries | $ 1.1 |  | $ 1.1 |

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