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Note 1 - Organization and Business (Details Textual)
$ in Millions
6 Months Ended
Aug. 04, 2022
USD ($)
Dec. 17, 2021
USD ($)
Jun. 30, 2022
USD ($)
a
ft²
Mar. 31, 2022
a
Feb. 14, 2022
USD ($)
Oct. 01, 2020
Sep. 30, 2020
Sep. 29, 2020
The Joint Venture Company [Member] | State of Alaska Mining Claims for Exploration and Development [Member]                
Area of Land (Acre)     13,000 13,000        
Contango Minerals [Member] | State of Alaska Mining Claims Located North and Northwest of Tetlin Lease [Member]                
Area of Land (Acre)     214,600          
Contango Minerals [Member] | State of Alaska Mining Claims Located Near Eagle/Hona Property [Member]                
Area of Land (Acre)     139,100          
Contango Minerals [Member] | State of Alaska Mining Claims Located Near Triple Z Property [Member]                
Area of Land (Acre)     14,800          
Contango Minerals [Member] | State of Alaska Mining Claims Located in Richardson District [Member]                
Area of Land (Acre)     52,700          
Contango Minerals [Member] | State of Alaska Mining Claims Located North and East of Lucky Shot Property [Member]                
Area of Land (Acre)     8,000          
Tetlin Lease [Member] | The Joint Venture Company [Member]                
Area of Land (Acre)     675,000          
Alaska Hard Rock Lease [Member] | Alaska Gold Torrent, LLC [Member]                
Area of Land (Acre)     8,600          
The Joint Venture Company [Member]                
Equity Method Investment, Ownership Percentage     30.00%       30.00% 30.00%
Exploration Budget, Amount Spent | $     $ 15.8          
Area of Drilling Completed (Square Foot) | ft²     33,000          
Expected Cash Needed | $   $ 47.9            
Expected Spending Next Fiscal Year | $         $ 26.0      
The Joint Venture Company [Member] | KG Mining [Member]                
Equity Method Investment, Ownership Percentage by Other Owner             70.00%  
The Joint Venture Company [Member] | Subsequent Event [Member]                
Expected Cash Needed | $ $ 39.6              
Equity Method Investment, Entity Shares of Expenditures, Amount | $ $ 11.9              
The Joint Venture Company [Member] | CORE Alaska [Member]                
Equity Method Investment, Ownership Percentage             30.00%  
Percentage Ownership in Company           30.00%    
The Joint Venture Company [Member] | KG Mining [Member]                
Percentage Ownership in Company           70.00%    
The Joint Venture Company [Member] | Royal Alaska LLC [Member]                
Equity Method Investment, Ownership Percentage             40.00%  
Royal Alaska LLC [Member] | KG Mining [Member]                
Percentage Ownership in Company             100.00%