Note 1 - Nature of Operations (Details Textual) - USD ($) $ in Thousands		3 Months Ended
	Mar. 10, 2023	Jan. 31, 2023	Jul. 31, 2022
Working Capital		$ 44,669
Cash and Cash Equivalents, at Carrying Value, Total		32,613	$ 32,536
Inventory, Net, Total		21,037	$ 66,570
November 2022 At-the-market Offering [Member]
Proceeds from Issuance of Common Stock, Net		22,295
Subsequent Event [Member] | November 2022 At-the-market Offering [Member]
Proceeds from Issuance of Common Stock, Net	$ 6,991
Uranium Inventory [Member]
Inventory, Net, Total		$ 20,639