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INVENTORIES - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Inventory Disclosure [Abstract]
Concentrates and work-in-progress	$ 41,026	$ 42,366
Inventory of ore in stockpiles	21,489	19,238
Raw materials and consumables	5,169	4,900
Total inventories	$ 67,684	$ 66,504

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Inventory of ore in stockpiles

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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