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Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Stockpiles - underground mine | $ 597 |
Concentrates | 3,271 | $ 2,048
Dore, net | 653 | 452
Subtotal - product inventories | 4,521 | 2,500
Materials and supplies | 8,979 | 7,861
Total | 13,500 | 10,361
Materials and supplies |  |
Inventory reserve | $ 100 | $ 400

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