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Note 4 - Winnemucca Mountain Property (Details Textual) - Winnemucca Mountain Property [Member]
Aug. 31, 2018
USD ($)
Jul. 31, 2018
USD ($)
Jul. 23, 2018
USD ($)
Sep. 14, 2012
a
Apr. 30, 2023
USD ($)
Jul. 31, 2022
USD ($)
Jul. 31, 2021
USD ($)
Mar. 25, 2019
USD ($)
Business Acquisition, Percentage of Voting Interests Acquired       80.00%       80.00%
Unpatented Mining Claims       138        
Area of Land | a       2,700        
Payments to Acquire Businesses, Gross $ 25,000 $ 25,000 $ 25,000          
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable     $ 3,000,000          
New Option Agreement [Member]                
Other Commitment             $ 285,453 $ 381,770
New Option Agreement [Member] | Accounts Payable and Accrued Liabilities [Member]                
Other Commitment         $ 285,453 $ 285,453    
New Option Agreement [Member] | Cash Payments [member]                
Other Commitment               181,770
New Option Agreement [Member] | Firm Commitments [Member]                
Other Commitment               $ 200,000