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Note 1 - Summary of Significant Accounting Policies - Inventories (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Finished Goods | $ 26,190 | $ 31,863
Work in Process | 14,418 | 16,508
Raw Material, Fuel and Supplies | 49,146 | 49,480
Total Inventories | $ 89,754 | $ 97,851

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