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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% |

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