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Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets:    
Equity securities $ 0 $ 44,152
Fair Value, Recurring    
Assets:    
Assets 3,630 56,794
Provisional metal sales contracts | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   299
Liabilities:    
Fair value of derivative liability   10
Gold Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   12,343
Liabilities:    
Fair value of derivative liability 1,981  
SIlver Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net 3,312  
Equity Securities | Fair Value, Recurring    
Liabilities:    
Marketable securities including warrants   44,152
Level 1 | Fair Value, Recurring    
Assets:    
Assets 0 43,893
Level 1 | Provisional metal sales contracts | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   0
Liabilities:    
Fair value of derivative liability   0
Level 1 | Gold Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   0
Liabilities:    
Fair value of derivative liability 0  
Level 1 | SIlver Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net 0  
Level 1 | Equity Securities | Fair Value, Recurring    
Liabilities:    
Marketable securities including warrants   43,893
Level 2 | Fair Value, Recurring    
Assets:    
Assets 3,630 12,901
Level 2 | Provisional metal sales contracts | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   299
Liabilities:    
Fair value of derivative liability   10
Level 2 | Gold Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   12,343
Liabilities:    
Fair value of derivative liability 1,981  
Level 2 | SIlver Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net 3,312  
Level 2 | Equity Securities | Fair Value, Recurring    
Liabilities:    
Marketable securities including warrants   259
Level 3   | Fair Value, Recurring    
Assets:    
Assets 0 0
Level 3   | Provisional metal sales contracts | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   0
Liabilities:    
Fair value of derivative liability   0
Level 3   | Gold Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net   0
Liabilities:    
Fair value of derivative liability 0  
Level 3   | SIlver Forwards | Fair Value, Recurring    
Assets:    
Fair value of other derivative instruments, net $ 0  
Level 3   | Equity Securities | Fair Value, Recurring    
Liabilities:    
Marketable securities including warrants   $ 0