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Note 10 - Inventories - Summary of Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Finished goods $ 28,166 $ 34,899
Raw materials, equipment spares and consumables 98,087 76,025
Work-in-progress 9,472 14,192
Total $ 135,725 $ 125,116