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Note 6 - Inventories - Costs of Inventories (Details) - USD ($)
$ in Thousands
Jul. 31, 2025
Jul. 31, 2024
Material and supplies $ 1,470 $ 215
In-process inventory 3,770 0
Inventory, Net 79,279 75,833
Uranium Inventory [Member]    
Purchased uranium inventories 72,899 75,440
Uranium Inventory [Member]    
Uranium concentrates from extraction 1,140 $ 178
Inventory, Net $ 72,900