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Derivatives (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) $ / t $ / oz oz t | Dec. 31, 2021 USD ($)
Embedded Derivative [Line Items] |  |
Unsettled sales contracts value | $ 27,731 |
Realized loss on embedded derivative | 720 | $ (777)
Realized (loss) gain | (720) | 777
Unrealized gain (loss) | 357 | 225
Trading Agreement With Auramet International LLC | Metal And Currencies Derivatives |  |
Embedded Derivative [Line Items] |  |
Realized (loss) gain | (2,000) | (1,200)
Unrealized gain (loss) | $ 1,800 | (1,800)
Gold |  |
Embedded Derivative [Line Items] |  |
Under contract | oz | 4,118 |
Average forward price | $ / oz | 1,752 |
Unsettled sales contracts value | $ 7,215 |
Realized (loss) gain | (79) | (47)
Unrealized gain (loss) | $ 136 |
Silver. |  |
Embedded Derivative [Line Items] |  |
Under contract | oz | 279,537 |
Average forward price | $ / oz | 21.45 |
Unsettled sales contracts value | $ 5,996 |
Realized (loss) gain |  | (44)
Unrealized gain (loss) | $ 433 | (159)
Copper |  |
Embedded Derivative [Line Items] |  |
Under contract | t | 231 |
Average forward price | $ / t | 8,294 |
Unsettled sales contracts value | $ 1,916 |
Realized (loss) gain | (127) | 73
Unrealized gain (loss) | $ 7 | 6
Lead |  |
Embedded Derivative [Line Items] |  |
Under contract | t | 1,386 |
Average forward price | $ / t | 2,018 |
Unsettled sales contracts value | $ 2,797 |
Realized (loss) gain | (150) | 163
Unrealized gain (loss) | $ 153 | (2)
Zinc |  |
Embedded Derivative [Line Items] |  |
Under contract | t | 3,268 |
Average forward price | $ / t | 3,001 |
Unsettled sales contracts value | $ 9,807 |
Realized loss on embedded derivative | 2,000 |
Realized (loss) gain | (364) | 632
Unrealized gain (loss) | $ (372) | $ 380
Zinc | Minimum |  |
Embedded Derivative [Line Items] |  |
Call option sold price per tonne | $ / t | 3,288 |
Zinc | Maximum |  |
Embedded Derivative [Line Items] |  |
Derivative, Average Cap Price | $ / t | 3,516 |

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- Definition Embedded Derivatives Weight Under Contract + References No definition available. + Details
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- Definition The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. + References No definition available. + Details
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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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