Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders' Equity / (Deficit) - USD ($) $ in Thousands		Total	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Redeemable Convertible Preferred Stock [Member] Preferred Stock [Member]	Series A Common Stock [Member] Common Stock [Member]	Series B Common Stock [Member] Common Stock [Member]	Common Class A [Member]	Common Class A [Member] Common Stock [Member]		Common Class B [Member]	Common Class B [Member] Common Stock [Member]
Balance at Dec. 31, 2020		$ (239,220)	$ 4,956	$ (242,254)	$ (2,037)	$ 154,210	$ 112	$ 3
Balance (in shares) at Dec. 31, 2020						39,223,194	112,012,693	3,054,318
Shares issued in connection with certain agreements		29,650	29,645				$ 1			$ 4
Shares issued in connection with certain agreements (in shares)							613,497			4,124,914
Conversion of Series A and Series B common stock into Class A and Class B common stock, respectively							$ (97)	$ (3)		$ 61			$ 39
Conversion of Series A and Series B common stock into Class A and Class B common stock, respectively (in shares)							(96,830,836)	(3,054,318)		60,421,367			39,463,787
Conversion of redeemable convertible preferred stock to common stock		193,210	193,136			$ (154,210)				$ 74
Conversion of redeemable convertible preferred stock to common stock (in shares)						(39,223,194)				73,813,713
Warrants and options exercised		24,238	24,230							$ 8
Warrant and options exercised (in shares)										8,392,316
Shares issued in connection with the Initial Public Offering, net of issuance cost		126,538	126,523							$ 15
Shares issued in connection with the Initial Public Offering, net of issuance cost (in shares)										14,773,939
Shares repurchased		(64,468)	(64,462)							$ (4)			$ (2)
Shares repurchased (in shares)										(4,138,866)			(2,307,692)
Restricted stock cancelation			18				$ (18)
Restricted stock cancelation (in shares)							(17,853,416)
Restricted stock grants			(11)				$ 4			$ 6			$ 1
Restricted stock grants (in shares)							3,687,431			5,989,392			700,000
Restricted stock forfeitures			6				$ (2)			$ (4)
Restricted stock forfeitures (in shares)							(1,629,369)			(3,736,010)
Common shares cancelation										(37,679)
Restricted stock units vesting (in shares)										219,072
Shares issued in connection with employee stock purchase plan		809	809
Shares issued in connection with employee stock purchase plan (in shares)										152,689
Stock-based compensation		269,358	269,358
Foreign currency translation adjustment		(64)			(64)
Net loss		(249,563)		(249,563)
Balance at Dec. 31, 2021	[1]	90,488	584,208	(491,817)	(2,101)					$ 160			$ 38
Balance (in shares) at Dec. 31, 2021									115,456,543	159,974,847	[1]	18,419,260	37,856,095	[1]
Shares issued in connection with certain agreements		19,005	19,003							$ 2
Shares issued in connection with certain agreements (in shares)										2,065,833
Shares repurchased		(9,607)	(9,606)							$ (1)
Shares repurchased (in shares)										(1,209,015)
Restricted stock grants			(9)							$ 9
Restricted stock grants (in shares)										9,054,271
Restricted stock forfeitures			1							$ (1)
Restricted stock forfeitures (in shares)										(1,328,744)
Class B common stock transferred to Class A common stock										$ 6			$ (6)
Class B common stock transferred to Class A common stock (in shares)										5,756,793			(5,756,793)
Options exercised		199	199
Options exercised (in shares)										315,430
Restricted stock units vesting (in shares)										227,505
Shares issued in connection with employee stock purchase plan		2,742	2,742
Shares issued in connection with employee stock purchase plan (in shares)										409,997
Stock-based compensation		304,386	304,386
Foreign currency translation adjustment		56			56
Net loss		(279,239)		(279,239)
Balance at Dec. 31, 2022	[2]	128,030	900,924	(771,056)	(2,045)					$ 175			$ 32
Balance (in shares) at Dec. 31, 2022									132,909,894	175,266,917	[2]	15,512,217	32,099,302	[2]
Shares repurchased		(15,421)	(15,421)										$ (325,923)
Shares repurchased (in shares)							(1,686,076)			(1,360,153)
Shares issued in connection with an agreement		5,387	5,386							$ 1
Shares issued in connection with an agreement (in shares)										651,369
Restricted stock grants			(11)							$ 11
Restricted stock grants (in shares)										11,467,755
Restricted stock forfeitures			1							$ (1)
Restricted stock forfeitures (in shares)										(1,241,675)
Class B common stock transferred to Class A common stock										$ 3			$ (3)
Class B common stock transferred to Class A common stock (in shares)										2,717,890			(2,717,890)
Performance stock units vesting (in shares)										142,500
Options exercised		241	241
Options exercised (in shares)										63,500
Restricted stock units vesting (in shares)										498,675
Shares issued in connection with employee stock purchase plan		3,058	3,058
Shares issued in connection with employee stock purchase plan (in shares)										424,654
Stock-based compensation		246,671	246,671
Foreign currency translation adjustment		35			35
Net loss		(187,481)		(187,481)
Balance at Dec. 31, 2023	[3]	$ 180,520	$ 1,140,849	$ (958,537)	$ (2,010)					$ 189			$ 29
Balance (in shares) at Dec. 31, 2023									150,989,571	188,631,432	[3]	17,886,352	29,055,489	[3]

[1] Includes 115,456,543 outstanding Class A common stock, 18,419,260 outstanding Class B common stock, 44,518,304 unvested Class A restricted stock and 19,436,835 unvested Class B restricted stock.

[2] Includes 132,909,894 outstanding Class A common stock, 15,512,217 outstanding Class B common stock, 42,357,023 unvested Class A restricted stock and 16,587,085 unvested Class B restricted stock.

[3] Includes 150,989,571 outstanding Class A common stock, 17,886,352 outstanding Class B common stock, 37,641,861 unvested Class A restricted stock and 11,169,137 unvested Class B restricted stock.