Note 1 - Nature of Operations (Details Textual) - USD ($)				3 Months Ended	9 Months Ended
	Jun. 13, 2022	Jun. 07, 2022	Apr. 19, 2022	Apr. 30, 2022	Apr. 30, 2022	Jul. 31, 2021	Apr. 30, 2021
Working Capital				$ 88,200,000	$ 88,200,000
Cash and Cash Equivalents, at Carrying Value, Total				23,754,031	23,754,031	$ 44,312,780	$ 43,930,316
Inventory, Net, Total				57,411,334	57,411,334	$ 29,172,480
Anfield Energy, Inc. [Member] | Settlement Agreement [Member]
Proceeds from Sale and Collection of Receivables, Total			$ 9,171,033
Subsequent Event [Member] | Anfield Energy, Inc. [Member] | Settlement Agreement [Member]
Proceeds from Sale and Collection of Receivables, Total	$ 9,200,000	$ 9,171,033
The 2021 At-the-market Offerings [Member]
Proceeds from Issuance of Common Stock, Net				18,557,112	149,200,901
The 2021 At-the-market Offerings [Member] | Subsequent Event [Member]
Proceeds from Issuance of Common Stock, Net	$ 7,309,084
Uranium Inventory [Member]
Inventory, Net, Total				$ 57,000,000.0	$ 57,000,000.0