Note 5 - Mineral Rights and Properties - Identifiable Assets Acquired and Liabilities Assumed (Details) (Parentheticals) - Reno Creak Acquistion [Member]	12 Months Ended
Jul. 31, 2019 $ / shares shares
USE Common shares (in shares) \| shares	14,634,748
USE share price (in dollars per share) \| $ / shares	$ 1.37
Warrant shares (in shares) \| shares	11,308,728
Warrant price (in dollars per share) \| $ / shares	$ 0.45

The number of warrants issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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Balance Type:	na
Period Type:	duration