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Other Balance Sheet Details - Summary of Inventory (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Other Balance Sheet Details [Abstract]    
Raw materials $ 14,148 $ 7,855
Work in process 1,470 2,208
Finished goods 1,670 801
Total inventory $ 17,288 $ 10,864