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Balance Sheet Information - Summary of Inventories, Net (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Net [Abstract]    
Raw materials $ 5,832 $ 6,502
Work-in-process 966 913
Finished goods 3,492 4,520
Inventories, net $ 10,290 $ 11,935