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Segment Information and Information about Geographic Areas - Net Revenues of Customer by Geographic Area (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net revenues, Total $ 411,486 $ 326,947 $ 244,091
United States      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net revenues, Total 329,753 264,852 199,852
Other      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net revenues, Total $ 81,733 $ 62,095 $ 44,239