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Income Taxes - Summary of Domestic and Foreign Components of Loss Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Domestic $ (126,624) $ (77,354) $ (65,695)
Foreign 5,847 (18,065) (3,194)
Loss before income taxes $ (120,777) $ (95,419) $ (68,889)