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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory
As of December 31, 2021 and 2020, inventories consisted of the following:
(in thousands)
December 31, 2021December 31, 2020
Raw materials
$58,689 $57,789 
Work in process
44,839 40,416 
Finished goods
14,354 12,273 
Total inventories
$117,882 $110,478