Note 8 - Equity-accounted Investment (Details Textual) - Uranium Royalty Corp [Member] - USD ($)	12 Months Ended
Jul. 31, 2019	Jul. 31, 2018
Equity Method Investment, Shares Owned	14,000,000
Equity Method Investment, Ownership Percentage	32.60%	11.30%
Royalty Purchase Agreement [Member]
Number Of Shares Acquired Through Sale Of Royalties	12,000,000
Consideration Shares, Fair Value	$ 9,077,842

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant