Note 11 - Equity-Accounted Investment (Details Textual) - USD ($)	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Uranium Royalty Corp [Member]
Equity Method Investment, Shares Owned (in shares)	17,978,364
Equity Method Investment, Ownership Percentage	14.80%	14.90%
Ownership Interest Percentage, Contingent, Outstanding Options and Warrants Fully Exercised	13.20%
Equity Method Investments, Fair Value Disclosure	$ 43,300,000	$ 34,200,000
JCU (Canada) Exploration Company Limited [Member]
Equity Method Investment, Ownership Percentage	50.00%
Equity Method Investment, Recoverable Exploration Expenditures	$ 63,000	1,667
Equity Method Investment Amount Owed From JCU	$ 6,000
Equity Method Investment, Amount Owed from Acquisition Company		$ 201,000