Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock [Member]	Convertible Founder Stock [Member]	Common Class A [Member]	Common Stock [Member]	Class A and Class B [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2020		$ 574,634
Balance (shares) at Dec. 31, 2020		115,277,850
Balance at Dec. 31, 2020	$ (306,249)				$ 1	$ 0	$ 99,575	$ 228	$ (406,053)
Balance (shares) at Dec. 31, 2020			635,818		109,447,843	0
Issuance of common stock upon early exercise of unvested options, net of repurchases					2,447,573	4,127
Vesting of early exercised options	4,182						4,182
Issuance of common stock upon exercise of vested options	19,137						19,137
Issuance of common stock upon exercise of vested options (shares)					7,072,147	1,685,598
Vesting of restricted stock (shares)						15,250
Stock-based compensation	48,363						48,363
Reclassification of common stock to Class B common stock upon initial public offering, Shares					(118,967,563)	118,967,563
Reclassification of common stock to Class B common stock upon initial public offering					$ (1)	$ 1
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering		$ (574,634)
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering (shares)		(115,277,850)
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering	574,634					$ 1	574,633
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering (shares)			(635,818)			115,913,668
Issuance of Class A common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs	783,158						783,158
Issuance of Class A common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs (shares)						23,000,000
Issuance of Class A common stock pursuant to charitable donation	13,290						13,290
Issuance of Class A common stock pursuant to charitable donation (shares)						250,000
Other comprehensive loss	(274)							(274)
Net loss	(132,696)								(132,696)
Balance at Jun. 30, 2021	1,003,545					$ 2	1,542,338	(46)	(538,749)
Balance (shares) at Jun. 30, 2021						259,836,206
Balance at Mar. 31, 2021		$ 574,634
Balance (shares) at Mar. 31, 2021		115,277,850
Balance at Mar. 31, 2021	(330,086)				$ 1	$ 0	120,449	43	(450,579)
Balance (shares) at Mar. 31, 2021			635,818		113,451,522	0
Issuance of common stock upon early exercise of unvested options, net of repurchases					1,319,208	4,127
Vesting of early exercised options	2,974						2,974
Issuance of common stock upon exercise of vested options	12,922						12,922
Issuance of common stock upon exercise of vested options (shares)					4,196,833	1,685,598
Vesting of restricted stock (shares)						15,250
Stock-based compensation	34,912						34,912
Reclassification of common stock to Class B common stock upon initial public offering, Shares					(118,967,563)	118,967,563
Reclassification of common stock to Class B common stock upon initial public offering					$ (1)	$ 1
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering		$ (574,634)
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering (shares)		(115,277,850)
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering	574,634					$ 1	574,633
Conversion of redeemable convertible preferred and founder stock to Class B common stock upon initial public offering (shares)			(635,818)			115,913,668
Issuance of Class A common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs	783,158						783,158
Issuance of Class A common stock upon initial public offering, net of underwriting discounts and commissions and other issuance costs (shares)						23,000,000
Issuance of Class A common stock pursuant to charitable donation	13,290			$ 13,300			13,290
Issuance of Class A common stock pursuant to charitable donation (shares)						250,000
Other comprehensive loss	(89)							(89)
Net loss	(88,170)								(88,170)
Balance at Jun. 30, 2021	1,003,545					$ 2	1,542,338	(46)	(538,749)
Balance (shares) at Jun. 30, 2021						259,836,206
Balance at Dec. 31, 2021	850,281					$ 3	1,599,962	(830)	(748,854)
Balance (shares) at Dec. 31, 2021						271,801,882
Issuance of common stock upon early exercise of unvested options						59,185
Repurchases of unvested options						(130,845)
Vesting of early exercised options	8,794						8,794
Issuance of common stock upon exercise of vested options	$ 25,039						25,039
Issuance of common stock upon exercise of vested options (shares)	7,695,923					7,636,738
Vesting of restricted stock (shares)						1,311,869
Stock-based compensation	$ 129,360						129,360
Issuance of Class A common stock pursuant to charitable donation	0
Issuance of common stock under employee stock purchase plan	22,485						22,485
Issuance of common stock under employee stock purchase plan (shares)						734,817
Other comprehensive loss	(8,717)							(8,717)
Net loss	(230,618)								(230,618)
Balance at Jun. 30, 2022	796,624					$ 3	1,785,640	(9,547)	(979,472)
Balance (shares) at Jun. 30, 2022						281,413,646
Balance at Mar. 31, 2022	836,069					$ 3	1,703,449	(5,542)	(861,841)
Balance (shares) at Mar. 31, 2022						278,036,762
Issuance of common stock upon early exercise of unvested options						14,584
Repurchases of unvested options						(121,867)
Vesting of early exercised options	3,093						3,093
Issuance of common stock upon exercise of vested options	8,634						8,634
Issuance of common stock upon exercise of vested options (shares)						2,610,173
Vesting of restricted stock (shares)						873,994
Stock-based compensation	70,464						70,464
Other comprehensive loss	(4,005)							(4,005)
Net loss	(117,631)								(117,631)
Balance at Jun. 30, 2022	$ 796,624					$ 3	$ 1,785,640	$ (9,547)	$ (979,472)
Balance (shares) at Jun. 30, 2022						281,413,646