Note 14 - Sales and Service Revenue and Cost of Sales and Services (Details Textual)	3 Months Ended		9 Months Ended
	Apr. 30, 2022 USD ($) lb	Apr. 30, 2021 USD ($)	Apr. 30, 2022 USD ($) lb	Apr. 30, 2021 USD ($)
Revenues, Total	$ 9,892,310	$ 0	$ 23,083,235	$ 0
Toll Processing Services [Member]
Revenues, Total	92,310	$ 0	137,235	$ 0
Uranium Inventory [Member]
Revenues, Total	$ 9,800,000		$ 22,946,000
Inventory, Sold During Period, Mass (Pound) | lb	200,000		500,000