Note 14 - Sales and Service Revenue and Cost of Sales and Services (Details Textual)		3 Months Ended		6 Months Ended
	Mar. 16, 2022 USD ($) lb	Jan. 31, 2022 USD ($) lb	Jan. 31, 2021 USD ($)	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)
Revenues, Total		$ 13,190,925	$ 0	$ 13,190,925	$ 0
Toll Processing Services [Member]
Revenues, Total		44,925	$ 0
Uranium Inventory [Member]
Revenues, Total		$ 13,146,000
Inventory, Sold During Period, Mass (Pound) | lb		300,000
Uranium Inventory [Member] | Subsequent Event [Member]
Revenues, Total	$ 9,800,000
Inventory, Sold During Period, Mass (Pound) | lb	200,000