Note 11 - Equity-Accounted Investment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Gain on Dilution of Ownership Interest	$ 654	$ 3,973	$ 4,473
Uranium Royalty Corp [Member]
Equity Method Investment, Shares Owned (in shares)	15,000,000
Equity Method Investment, Ownership Percentage	14.90%	15.50%
Ownership Interest Percentage, Contingent, Outstanding Options and Warrants Fully Exercised	14.90%	12.70%
Equity Method Investments, Fair Value Disclosure	$ 34,200	$ 43,700
Gain on Dilution of Ownership Interest	$ 654	3,973
JCU (Canada) Exploration Company Limited [Member]
Equity Method Investment, Ownership Percentage	50.00%
Equity Method Investment, Recoverable Exploration Expenditures	$ 1,667
Equity Method Investment Amount Owed From JCU	$ 201	$ 0