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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Sep. 27, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 25,021 $ 27,285
Work-in-process 3,666 5,503
Finished goods 25,173 27,473
Inventories $ 53,860 $ 60,261