Note 6 - Equity-accounted Investment (Details Textual) - Uranium Royalty Corp [Member] - shares	1 Months Ended
Dec. 09, 2019	Oct. 31, 2019
Equity Method Investment, Shares Owned		14,000,000
Equity Method Investment, Ownership Percentage		31.30%
Subsequent Event [Member]
Sale of Stock, Number of Shares Issued in Transaction	20,000,000

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