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Investments - Disclosure of Detailed Information about Financial Instruments (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of financial assets [line items]    
Non-current investments, beginning $ 24,056  
Current investments, beginning 5,001  
Fair Value Adjustment in Other Comprehensive Income (Loss) (8,450) $ (11,847)
Fair Value Adjustment in Net Income (Loss) 1,756 (1,659)
Current investments, ending 3,773 5,001
Non-current investments, ending 126,117 24,056
Non-Current [member]    
Disclosure of financial assets [line items]    
Non-current investments, beginning 24,056 50,085
Additions 149,501 20,799
Disposals (39,065) (34,527)
Transfers in (out) (1,272) (4,986)
Fair Value Adjustment (6,633) (7,489)
Interest Revenue (470) 174
Non-current investments, ending 126,117 24,056
Non-Current [member] | Common Shares Held [member]    
Disclosure of financial assets [line items]    
Non-current investments, beginning 21,486 28,416
Additions 10,748 20,799
Disposals (4,820) (15,882)
Transfers in (out) 0 0
Fair Value Adjustment in Other Comprehensive Income (Loss) (8,389) (11,847)
Interest Revenue 0 0
Non-current investments, ending 19,025 21,486
Non-Current [member] | Convertible Debt [member]    
Disclosure of financial assets [line items]    
Non-current investments, beginning 904 15,525
Additions 104,972 0
Disposals (934) (12,470)
Transfers in (out) (1,272) 0
Fair Value Adjustment in Net Income (Loss) 1,334 (2,151)
Interest Revenue 0 0
Non-current investments, ending 105,004 904
Non-Current [member] | Warrants and other [member]    
Disclosure of financial assets [line items]    
Non-current investments, beginning 1,666 1,143
Additions 0 0
Disposals 0 (99)
Transfers in (out) 0 0
Fair Value Adjustment in Net Income (Loss) 422 622
Interest Revenue 0 0
Non-current investments, ending 2,088 1,666
Non-Current [member] | Vale Royalties [Member]    
Disclosure of financial assets [line items]    
Non-current investments, beginning 0 0
Additions   0
Disposals   (5,887)
Transfers in (out)   0
Fair Value Adjustment in Net Income (Loss)   5,887
Interest Revenue   0
Non-current investments, ending   0
Non-Current [member] | Loan Receivable [Member]    
Disclosure of financial assets [line items]    
Non-current investments, beginning 0 5,001
Additions 33,781 0
Disposals (33,311) (189)
Transfers in (out) 0 (4,986)
Fair Value Adjustment in Net Income (Loss) 0 0
Interest Revenue (470) 174
Non-current investments, ending 0 0
Short-Term [member]    
Disclosure of financial assets [line items]    
Current investments, beginning 5,001 1,867
Additions 0 0
Disposals (2,787) (1,898)
Transfers in (out) 1,272 4,986
Fair Value Adjustment 0 (130)
Interest Revenue 287 176
Current investments, ending 3,773 5,001
Short-Term [member] | Convertible Debt [member]    
Disclosure of financial assets [line items]    
Current investments, beginning 0 1,852
Additions 0 0
Disposals 0 (1,722)
Transfers in (out) 1,272 0
Fair Value Adjustment in Net Income (Loss) 0 (130)
Interest Revenue 0 0
Current investments, ending 1,272 0
Short-Term [member] | Loan Receivable [Member]    
Disclosure of financial assets [line items]    
Current investments, beginning 5,001 15
Additions 0 0
Disposals (2,787) (176)
Transfers in (out) 0 4,986
Fair Value Adjustment in Net Income (Loss) 0 0
Interest Revenue 287 176
Current investments, ending 2,501 5,001
Equity Securities and Warrants and Other and Debt Securities and Loans Receivable [member]    
Disclosure of financial assets [line items]    
Total investments at beginning of period 29,057 51,952
Additions 149,501 20,799
Disposals (41,852) (36,425)
Transfers in (out) 0 0
Fair Value Adjustment (6,633) (7,619)
Interest Revenue (183) 350
Total investments at end of period $ 129,890 $ 29,057