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Gold Prepay Loan (Tables)
12 Months Ended
Dec. 31, 2021
Financial Instruments [Abstract]  
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments
For the year ended December 31, 2021For the year ended December 31, 2020
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Opening balance15,157 6,842 
Increase in principal of Gold Prepay Loan— 15,500 
Gold deliveries(1,522)(11,674)
Interest(210)(965)
Change in fair value(690)5,454 
Termination(12,735)— 
Closing balance 15,157