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Note 2 - Inventories - Components of Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Raw materials $ 45,139 $ 47,978
Work-in-process 7,520 5,114
Finished goods 16,134 15,773
Supplies 2,177 2,164
Total inventories $ 70,970 $ 71,029