Note 5 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Effective Income Tax Rate Reconciliation, Percent, Total	32.00%	20.00%	62.00%	29.00%
Undistributed Earnings of Foreign Subsidiaries	$ 0.5		$ 0.5

Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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