Note 5 - Balance Sheet (Details Textual) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2025	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024	Jan. 31, 2025
Impairment, Long-Lived Asset, Held-for-Use	$ 0					$ 0
Depreciation		$ 72,000	$ 77,000	$ 148,000	$ 158,000