Reporting Segment and Geographical Information - Summary of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 227,868	$ 101,716	$ 740,913	$ 126,734
United States
Segment Reporting Information [Line Items]
Revenue	223,685	100,223	731,084	122,000
Foreign
Segment Reporting Information [Line Items]
Revenue	$ 4,183	$ 1,493	$ 9,829	$ 4,734

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details