Note 7 - Inventories (Details Textual) $ in Thousands	2 Months Ended
	Sep. 28, 2023 USD ($) lb	Jul. 31, 2023 lb
Subsequent Event [Member]
Increase in Sale Obligations, Mass (Pound)	300,000
Increase in Sale Obligations, Value | $	$ 19,925
Purchase Commitment, Cancelled, Mass (Pound)	200,000
Purchase Commitment, Canceled, Value | $	$ 10,244
Inventory Received, Mass (Pound)	295,000
Inventory Received, Value | $	$ 10,058
Uranium Inventory [Member] | Physical Uranium Program [Member]
Inventory, Balance , Mass (Pound)		171,000