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Gold and Silver Stream Agreements (Tables) | 9 Months Ended
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Sep. 30, 2022
Gold and Silver Stream Agreements |
Schedule of liabilities related to the deferred revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of | ​ | As of
​ | ​ | September 30, | ​ | December 31,
​ | ​ | 2022 | ​ | 2021
​ | ​ | (in thousands)
Liability related to the Gold Stream Agreement | ​ | $ | 20,506 | ​ | $ | 20,364
Liability related to the Silver Stream Agreement | ​ | ​ | 22,695 | ​ | ​ | 22,196
Total liability | ​ | $ | 43,201 | ​ | $ | 42,560

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