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Commitments and Contingencies (Details)
$ in Thousands, T in Millions
12 Months Ended
Sep. 29, 2020
USD ($)
May 29, 2020
USD ($)
Dec. 31, 2023
USD ($)
T
Dec. 31, 2022
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]        
Royalty payment, percentage of net profit     4.00% 4.00%
Royalty payment, annual advance     $ 120  
Royalty payment, additional incremental payment     $ 120  
Royalty payment, annual tons mined threshold | T     5.0  
Royalty payment, maximum lease payments     $ 7,600  
Payments to acquire royalty interests in mining properties     $ 3,300 $ 3,300
Proceeds from sale of royalty to Sprott $ 30,000 $ 30,000    
Smelter royalty obligation, percentage 1.50% 1.50%    
Royalty obligation, metal price discount rate     5.00%  
Royalty obligation        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Royalty obligation, fair value     $ 146,700 146,700
Other assets, noncurrent        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Payments to acquire royalty interests in mining properties     $ 600 $ 600