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Zinc Zero Cost Collar (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |
Realized (gain) loss on zinc zero cost collar | $ 720 | $ (777)
Unrealized (gain) loss on zinc zero cost collar | (357) | (225)
Total | 170 | 3,000
Zinc |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Realized (gain) loss on zinc zero cost collar | 364 | (632)
Unrealized (gain) loss on zinc zero cost collar | 372 | (380)
Zero Cost Collar | Zinc | Not designated as hedge |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Realized (gain) loss on zinc zero cost collar | 2,014 | 1,156
Unrealized (gain) loss on zinc zero cost collar | (1,844) | 1,844
Total | $ 170 | $ 3,000

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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 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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