Note 9 - Equity-accounted Investments - Equity-accounted Investment (Details) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2022	Oct. 31, 2021
Balance	$ 24,177
Balance	46,073
Total	31	$ 2,753
Uranium Royalty Corp and JCU (Canada) Exploration Company Limited [Member]
Balance	24,177
Share of income (loss)	(195)	835
Foreign exchange difference	(2,637)
Balance	46,073
Total	31	2,753
JCU (Canada) Exploration Company Limited [Member]
Investment in JCU (Note 3)	24,502
Share of income (loss)	(598)
Uranium Royalty Corp [Member]
Share of income (loss)	403
Gain on dilution of ownership interest in URC	$ 226	$ 1,918

Amount of gain (loss) from foreign currency translation of an equity method investment.

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This item represents the entity's proportionate share for the period of the net gain on ownership interest dilution of its invested (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied.

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Represents the amount of income (loss) from Equity Method investment.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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