Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity/(Deficit) - USD ($) shares in Thousands, $ in Thousands		Total	Series A Preferred Stock	Series D Preferred Stock	Convertible Preferred Stock	Convertible Preferred Stock Series D One Warrants	Convertible Preferred Stock Series G Preferred Stock	Convertible Preferred Stock Series A Preferred Stock	Convertible Preferred Stock Series D Preferred Stock	Convertible Preferred Stock Series H Preferred Stock	Class A and Class B Common Stock	Class A and Class B Common Stock Series A Preferred Stock	Class A and Class B Common Stock Series D Preferred Stock	Additional Paid-In Capital	Additional Paid-In Capital Series A Preferred Stock	Additional Paid-In Capital Series D Preferred Stock	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit	Non- controlling Interest
Beginning balance (in shares) at Dec. 31, 2018					324,304
Beginning balance at Dec. 31, 2018					$ 187,191
Ending balance (in shares) at Dec. 31, 2019					324,304
Ending balance at Dec. 31, 2019					$ 187,191
Balance beginning (Shares) at Dec. 31, 2018											157,873
Balance beginning at Dec. 31, 2018		$ (113,189)									$ 16			$ 54,871			$ (8)	$ (168,068)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercises of stock option (in shares)		8,895									8,895
Issuance of common stock upon exercises of stock options		$ 3,185									$ 1			3,184					0
Stock- based compensation		17,634												17,634
Others		41															41
Cumulative translation adjustments		12															6		6
Capital contribution from minority interest holder		50,000												25,500					24,500
Net loss		(71,114)																(70,968)	(146)
Issuance of warrants in connection with intangible asset purchase		482												482
Balance ending (Shares) at Dec. 31, 2019											166,768
Balance ending at Dec. 31, 2019		$ (112,949)									$ 17			101,671			39	(239,036)	24,360
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of preferred stock (in shares)							23,645
Issuance of preferred stock							$ 149,669
Issuance of Series D-1 warrants upon exercise of warrants for cash (in shares)	[1]					1,573
Issuance of Series D-1 warrants upon exercise of warrants for cash	[1]					$ 8,225
Conversion of preferred stock to common stock (in shares)								(11,642)	(645)
Conversion of preferred stock to common stock								$ (233)	$ (25)
Ending balance (in shares) at Dec. 31, 2020		337,235			337,235
Ending balance at Dec. 31, 2020					$ 344,827
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercises of stock option (in shares)		20,590
Issuance of common stock in connection with the acquisition of a business (in shares)											933
Issuance of common stock in connection with the acquisition of a business		$ 35,203												35,203
Conversion of convertible preferred stock to common stock in connection with the direct listing (in shares)												11,642	645
Conversion of convertible preferred stock to common stock in connection with the direct listing			$ 233	$ 25								$ 1	$ 0		$ 232	$ 25
Stock- based compensation		79,158												79,158
Others		(33)															(33)		0
Cumulative translation adjustments		168															84		84
Net loss		(257,691)																(253,254)	(4,437)
Issuance of common stock upon exercise of stock options and settlement of RSUs (in shares)											20,871
Issuance of common stock from asset purchase (in shares)											80
Issuance of common stock from asset purchase		2,854												2,854
Issuance of restricted stock awards granted in conjunction with a business combination (in shares)											388
Issuance of restricted stock awards granted in conjunction with a business combination		5,493												5,493
Balance ending (Shares) at Dec. 31, 2020											201,327
Balance ending at Dec. 31, 2020		$ (232,381)									$ 20			239,792			90	(492,290)	20,007
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of preferred stock (in shares)										11,889
Issuance of preferred stock										$ 534,286
Conversion of preferred stock to common stock (in shares)					(349,124)
Conversion of preferred stock to common stock					$ (879,113)
Ending balance (in shares) at Dec. 31, 2021		349,124			0
Ending balance at Dec. 31, 2021					$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercises of stock option (in shares)		33,373									33,372
Issuance of common stock upon exercises of stock options		$ 65,242									$ 3			65,284					(45)
Issuance of common stock in connection with the acquisition of a business (in shares)											487
Issuance of common stock in connection with the acquisition of a business		31,274												31,274
Issuance of common stock under Employee Stock Purchase Plan (in shares)											191
Issuance of common stock under Employee Stock Purchase Plan		11,268												11,268
Conversion of convertible preferred stock to common stock in connection with the direct listing (in shares)											349,124
Conversion of convertible preferred stock to common stock in connection with the direct listing		879,113									$ 35			879,078
Stock- based compensation		341,942												341,942
Release of restricted stock units (in shares)											1,376
Others (in shares)											1
Others		0																	0
Cumulative translation adjustments		(55)															(28)		(27)
Net loss		(503,480)																(491,651)	(11,829)
Issuance of common stock upon exercise of stock options and settlement of RSUs		15,158									$ 2			15,156
Balance ending (Shares) at Dec. 31, 2021											585,878
Balance ending at Dec. 31, 2021		$ 592,923									$ 58			$ 1,568,638			$ 62	$ (983,941)	$ 8,106

[1] Exercise of warrants for gross proceeds of $0.1 million and a reclassification of warrant liability fair market value of $8.1 million as of the exercise date