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Inventory - Components of Inventory (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 43,418 $ 36,987
Work in process 1,787 1,085
Finished goods 75,055 60,233
Total inventory $ 120,260 $ 98,305