Note 5 - Balance Sheet (Details Textual) - USD ($)		3 Months Ended		12 Months Ended
	Jan. 31, 2025	Apr. 30, 2025	Apr. 30, 2024	Jan. 31, 2025
Impairment, Long-Lived Asset, Held-for-Use	$ 0			$ 0
Depreciation		$ 77,000	$ 81,000