Note 4 - Inventories (Details Textual)	1 Months Ended	9 Months Ended
	Jun. 13, 2022 USD ($) lb	Apr. 30, 2022 USD ($) lb	Apr. 30, 2021 USD ($)
Increase (Decrease) in Inventories, Total | $		$ 28,046,839	$ 26,193,818
Uranium Inventory [Member]
Inventory, Increase from Purchases, Mass (Pound)		1,100,000
Inventory, Decrease From Sales, Mass (Pound)		500,000
Uranium Inventory [Member] | Subsequent Event [Member]
Inventory, Increase from Purchases, Mass (Pound)	200,000
Increase (Decrease) in Inventories, Total | $	$ 9,080,000
Uranium Inventory [Member] | Physical Uranium Program [Member]
Inventory, Increase from Purchases, Mass (Pound)		1,800,000