Gold and Silver Stream Agreements - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2022	Dec. 31, 2021	Nov. 30, 2017
Discount rate (as a percent)			8.00%
Deferred revenue		$ 43,201	$ 42,560
Gold Streaming Agreement
Deferred revenue		20,506	20,364
Gold Streaming Agreement | Aquila Resources Inc. | Gold.
Amount committed	$ 50,000			$ 55,000
Cash acquisition costs	20,000
Deposit amount	5,000
Project Debt Finance First Draw Down	$ 25,000
Initial Term of Agreement	40 years
Automatic Renewal Term of Agreement	10 years
Deferred revenue		20,000
Contingent Security Deposit Liability		30,000
Threshold Stream (as a percent)	18.50%
Trail Stream (as a percent)	9.25%
Spot price of gold (as a percent)	30.00%
Maximum Amount Receivable on Gold Per Ounce	$ 600,000
Threshold price of silver at which deposit received is adjusted	105
Gold Streaming Agreement | Aquila Resources Inc. | Silver
Deferred revenue		17,200
Threshold price of silver at which deposit received is adjusted	$ 4,000
Gold Streaming Agreement | Gold Resources Acquisition Company | Aquila Resources Inc. | Gold.
Ownership percentage	100.00%
Silver Streaming Agreement
Deferred revenue		22,695	$ 22,196
Silver Streaming Agreement | Aquila Resources Inc. | Silver
Cash acquisition costs		$ 17,200
Deposit amount	$ 0
Initial Term of Agreement	40 years
Automatic Renewal Term of Agreement	10 years
Commodity produced (as a percent)	85.00%