Segment Information - Reconciliation of Total Reportable Segment Revenue and Gross Profit to Consolidated Total Revenue and Loss Before Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reconciliation to consolidated total revenue
Total revenue	$ 761,890	$ 253,093	$ 1,353,008	$ 628,865
Reconciliation to consolidated loss before provision for income taxes
Gross profit	63,128	7,607	99,304	25,994
Selling, general and administrative expenses	123,898	47,911	232,764	106,291
Depreciation and amortization	3,058	1,083	5,900	2,049
Interest expense	3,880	1,297	7,692	4,123
Interest income	(2,062)	(715)	(4,358)	(2,671)
Revaluation of preferred stock warrant		21,260		20,470
Other income, net	(33)	(53)	(48)	(86)
Loss before provision for income taxes	(65,613)	(63,176)	(142,646)	(104,182)
All Other
Reconciliation to consolidated total revenue
Total revenue	3,360	286	6,559	726
Reconciliation to consolidated loss before provision for income taxes
Gross profit	1,826	67	3,656	222
Reportable Segments
Reconciliation to consolidated total revenue
Total revenue	758,530	252,807	1,346,449	628,139
Reconciliation to consolidated loss before provision for income taxes
Gross profit	$ 61,302	$ 7,540	$ 95,648	$ 25,772