Note 8 - Federal, State and Local Income Taxes (Details Textual) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Apr. 30, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Percent, Total	25.60%	23.80%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	4.85%	3.04%
Unrecognized Tax Benefits	$ 0
Open Tax Year	2021 2022 2023