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Note 8 - Acquisitions (Details Textual)
Aug. 06, 2024
USD ($)
Jul. 10, 2024
USD ($)
$ / shares
shares
May 01, 2024
USD ($)
Dec. 31, 2024
$ / shares
Dec. 31, 2023
$ / shares
May 09, 2023
$ / shares
Business Acquisition [Line Items]            
Common stock, par value per share | $ / shares       $ 0.01 $ 0.01 $ 0.01
Highgold Acquisition [Member]            
Business Acquisition [Line Items]            
Asset acquisition, total consideration   $ 35,000,000        
Asset acquisition, consideration in shares   33,800,000        
Asset acquisition, consideration in direct transactions costs   $ 1,200,000        
Avidian Gold Corp. [Member]            
Business Acquisition [Line Items]            
Asset acquisition, total consideration $ 2,100,000          
Asset acquisition, consideration in shares 1,700,000          
Asset acquisition, cash consideration 400,000          
Contingent payable 1,000,000          
Asset acquisition, liability recognized for deferred consideration 0          
Asset Acquisition, recognized amount for deferred consideration 0          
Asset acquisition, fair value $ 0          
HighGold Acquisition [Member]            
Business Acquisition [Line Items]            
Outstanding equity interests acquired     100.00%      
Agreement date     May 01, 2024      
HighGold Acquisition [Member] | Contango Shareholders [Member]            
Business Acquisition [Line Items]            
Shareholders ownership percentage   85.90%        
Avidian Gold Corp. [Member]            
Business Acquisition [Line Items]            
Stock purchase agreement date     May 01, 2024      
Percentage of Ownership Purchase     100.00%      
Initial consideration     $ 2,400,000      
Contingent payment     $ 1,000,000      
Acquisition date Aug. 06, 2024          
Total equity value $ 1,663,539          
Shares withheld at closing 207,945          
Cash consideration 400,000          
Initial purchase price 2,063,539          
Contango Mining Canada Inc. [Member] | HighGold Acquisition [Member]            
Business Acquisition [Line Items]            
Shareholders ownership percentage in combined company   14.10%        
Deposit [Member] | Avidian Gold Corp. [Member]            
Business Acquisition [Line Items]            
Cash consideration 50,000          
Due on Settlement of Withholding Contingency [Member] | Avidian Gold Corp. [Member]            
Business Acquisition [Line Items]            
Shares to be paid upon settlement of withholding contingency 150,000          
Due on or Before the 6-month Anniversary [Member] | Avidian Gold Corp. [Member]            
Business Acquisition [Line Items]            
Cash consideration $ 200,000          
Common Stock [Member] | HighGold Acquisition [Member]            
Business Acquisition [Line Items]            
Exchange ratio   0.019        
Common stock, par value per share | $ / shares   $ 0.01        
Shares issued | shares   1,698,887        
Value of share   $ 33,800,000