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Note 1 - Organization and Business (Details Textual)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
a
Dec. 31, 2023
USD ($)
May 17, 2023
Nov. 30, 2022
a
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Rehabilitation of existing drift | m² 442      
Addition of new drift | m² 612      
Core exploration drilling area | m² 3,816      
Contango Minerals [Member] | State of Alaska Mining Claims Located North and Northwest of Tetlin Lease [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 145,280      
Contango Minerals [Member] | State of Alaska Mining Claims Located Near Eagle/Hona Property [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 69,780     69,000
Contango Minerals [Member] | State of Alaska Mining Claims Located Near Triple Z Property [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 14,800      
Contango Minerals [Member] | State of Alaska Mining Claims Located in Richardson District [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 52,700      
Contango Minerals [Member] | State of Alaska Mining Claims Located North and East of Lucky Shot Property [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 8,000      
Alaska Hard Rock Lease [Member] | Alaska Gold Torrent, LLC [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 8,600      
Peak Gold, LLC [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Equity Method Investment, Ownership Percentage 30.00%   30.00%  
The Joint Venture Company [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Equity Method Investment, Ownership Percentage 30.00%      
Expected Cash Needed | $ $ 248.1 $ 248.1    
Equity Method Investment, Entity Shares of Expenditures, Amount | $ 74.4 74.4    
Exploration Budget, Funded Amount | $ $ 62.7 $ 62.7    
The Joint Venture Company [Member] | KG Mining [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Equity Method Investment, Ownership Percentage by Other Owner 70.00%      
The Joint Venture Company [Member] | State of Alaska Mining Claims for Exploration and Development [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 13,000      
The Joint Venture Company [Member] | Tetlin Lease [Member]        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Area of Land (Acre) 675,000