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Inventories
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Inventories InventoriesInventories at September 30, 2021 and December 31, 2020 consisted of the following:
(in thousands)September 30, 2021December 31, 2020
Raw material$2,926$3,100
Work-in-process4,5677,079
Finished goods13,01513,288
Supplies8261,112
Total inventories$21,334$24,579