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Note 2 - Inventories (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Inventories |  |
Raw coal | $ 14,227 | $ 20,122
Saleable coal | 21,902 | 12,013
Supplies | 5,151 | 5,028
Total inventories | $ 41,280 | $ 37,163

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