Goodwill and Intangible Assets, Net - Summary of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 12,096	$ 12,096
Accumulated Amortization	(9,111)	(5,873)
Total future amortization	2,985	6,223
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	10,496	10,496
Accumulated Amortization	(8,157)	(5,218)
Total future amortization	$ 2,339	$ 5,278
Weighted Average Remaining Useful Life	10 months 24 days	1 year 6 months
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 1,600	$ 1,600
Accumulated Amortization	(954)	(655)
Total future amortization	$ 646	$ 945
Weighted Average Remaining Useful Life	1 year 8 months 12 days	2 years 4 months 24 days