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Financial Risk, Management and Objectives (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of risk management strategy related to hedge accounting [line items]    
Liabilities $ 125 $ 1,157
Concentration Risk    
Disclosure of risk management strategy related to hedge accounting [line items]    
Percentage of physical gold bullion that constitutes total equity 63.90% 65.30%
Percentage of physical silver bullion that constitutes total equity 36.00% 34.70%
Liquidity Risk    
Disclosure of risk management strategy related to hedge accounting [line items]    
Number of days for advance notice required 15 days  
Canada | Currency Risk    
Disclosure of risk management strategy related to hedge accounting [line items]    
Liabilities $ 82 $ 184
Scenario Member | Other Price Risk    
Disclosure of risk management strategy related to hedge accounting [line items]    
Percentage increase in market value of gold 1.00%  
Percentage decrease in market value of gold 1.00%  
Percentage increase in market value of silver 1.00%  
Percentage decrease in market value of silver 1.00%  
Increase (decrease) in equity $ 44,200 $ 29,600
Scenario Member | Canada    
Disclosure of risk management strategy related to hedge accounting [line items]    
Percent change in the exchange rate between the Canadian and U.S. Dollars 1.00%