Note 6 - Equity-accounted Investment (Details Textual) - shares	3 Months Ended
Jan. 31, 2020	Jul. 31, 2019
Uranium Royalty Corp [Member] \| Reno Creek Project [Member]
Profit Interest Royalty, Percent	0.50%
Uranium Royalty Corp [Member]
Equity Method Investment, Shares Owned	14,000,000
Sale of Stock, Number of Shares Issued in Transaction	20,000,000
Equity Method Investment, Ownership Percentage	19.50%	32.60%

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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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant