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Note 4 - Notes Receivable (Details Textual)
$ in Thousands
1 Months Ended
Jan. 11, 2024
CAD ($)
Jul. 27, 2023
USD ($)
Nov. 03, 2021
CAD ($)
Jul. 27, 2021
USD ($)
Jul. 27, 2018
USD ($)
Dec. 31, 2022
CAD ($)
Feb. 29, 2024
USD ($)
Note Receivable Upon Completion of Galore Creek Project Pre-feasibility [Member]              
Financing Receivable, after Allowance for Credit Loss         $ 75,000   $ 75,000
Proceeds from Collection of Notes Receivable   $ 25,000   $ 75,000      
Note Receivable Upon Completion of Galore Creek Project Feasibility [Member]              
Financing Receivable, after Allowance for Credit Loss     $ 1,000   25,000    
Note Receivable Upon Approval of Galore Creek Project Construction Plan [Member]              
Financing Receivable, after Allowance for Credit Loss         75,000   75,000
Notes Receivable, Fair Value Disclosure             0
Note Receivable upon Completion of Minas San Roque Project Prefeasibility [Member]              
Financing Receivable, after Allowance for Credit Loss     750        
Note Receivable upon Completion of Minas San Roque Project Feasibility [Member]              
Financing Receivable, after Allowance for Credit Loss             $ 0
Proceeds from Collection of Notes Receivable $ 1,000         $ 750  
Galore Creek [Member]              
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates         $ 100,000,000    
Minas San Roque [Member]              
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates     $ 250        
Interest Sold     49.00%