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Reclamation and Remediation - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation	$ 1,265	$ 1,208	$ 1,105
Reclamation and remediation discount rate	8.00%
Reclamation Liabilities	$ 1,856	1,890	$ 2,003
Don David Gold Mine
Asset Retirement Obligation	1,300	1,200
Reclamation Liabilities	$ 1,900	$ 1,900

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- Definition

Reclamation And Remediation Discount Rate

+ References

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- Definition

Reclamation Liabilities

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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