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Note 4 - Inventories - Costs of Inventories (Details) - USD ($)
Apr. 30, 2022
Jul. 31, 2021
Material and supplies $ 232,195 $ 33,781
Inventory, Net, Total 57,411,334 29,172,480
Uranium Inventory [Member]    
Uranium concentrates from production 177,881 177,881
Purchased uranium inventories 57,001,258 $ 28,960,818
Inventory, Net, Total $ 57,000,000.0