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Fair Value Measurement - Realized Unrealized Derivatives, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Realized (loss) gain	$ (720)	$ 777
Unrealized gain (loss)	357	225
Total realized/ unrealized derivatives, net	(363)	1,002
Gold
Derivatives, Fair Value [Line Items]
Realized (loss) gain	(79)	(47)
Unrealized gain (loss)	136
Total realized/ unrealized derivatives, net	57	(47)
Silver.
Derivatives, Fair Value [Line Items]
Realized (loss) gain		(44)
Unrealized gain (loss)	433	(159)
Total realized/ unrealized derivatives, net	433	(203)
Copper
Derivatives, Fair Value [Line Items]
Realized (loss) gain	(127)	73
Unrealized gain (loss)	7	6
Total realized/ unrealized derivatives, net	(120)	79
Lead
Derivatives, Fair Value [Line Items]
Realized (loss) gain	(150)	163
Unrealized gain (loss)	153	(2)
Total realized/ unrealized derivatives, net	3	161
Zinc
Derivatives, Fair Value [Line Items]
Realized (loss) gain	(364)	632
Unrealized gain (loss)	(372)	380
Total realized/ unrealized derivatives, net	$ (736)	$ 1,012

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 15
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- Definition

The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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