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Note 24 - Subsequent Event (Details Textual)
2 Months Ended 12 Months Ended
Oct. 18, 2024
USD ($)
lb
Sep. 26, 2024
USD ($)
Sep. 20, 2024
USD ($)
Sep. 28, 2024
lb
Jul. 31, 2024
USD ($)
Jul. 31, 2023
USD ($)
Jul. 31, 2022
USD ($)
Proceeds from Sale of Equity Securities, FV-NI         $ 3,008,000 $ 4,590,000 $ 9,980,000
Subsequent Event [Member]              
Proceeds from Sale of Equity Securities, FV-NI   $ 55,000,000          
Inventory, Decrease From Sales, Mass (Pound) | lb 100,000     110,000      
Uranium Price Per Pound $ 80.25            
Subsequent Event [Member] | Green Mountain Mining Venture [Member]              
Payments to Acquire Businesses, Gross     $ 175,000,000        
Acquisition, Bonds Replaced, Amount     $ 25,000,000        
Green Mountain Mining Venture [Member] | Subsequent Event [Member] | Kennecott Uranium Company (KUC) [Member]              
Subsidiary, Ownership Percentage, Parent     50.00%        
Green Mountain Mining Venture [Member] | Subsequent Event [Member] | Wyoming Coal Resources Company (WCRC) [Member]              
Subsidiary, Ownership Percentage, Parent     50.00%