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Note 14 - Product Inventories - Schedule of Our Major Components of Product Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Inventory [Line Items] |  |
Product inventories | $ 28,823 | $ 37,303
Concentrates |  |
Inventory [Line Items] |  |
Product inventories | 13,328 | 21,513
Stockpiled ore |  |
Inventory [Line Items] |  |
Product inventories | 7,168 | 6,869
In-process |  |
Inventory [Line Items] |  |
Product inventories | $ 8,327 | $ 8,921

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