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Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Finished Goods | $ 31,863 | $ 37,130
Work in Process | 16,508 | 20,393
Raw Material, Fuel and Supplies | 49,480 | 48,747
Total Inventories | $ 97,851 | $ 106,270

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