Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Redeemable Convertible Preferred Stock
Mezzanine equity, beginning balance (in shares) at Dec. 31, 2020						93,328,118
Mezzanine equity, beginning balance at Dec. 31, 2020						$ 249,962
Increase (Decrease) in Temporary Equity [Roll Forward]
Pre-closing stock repurchase, net of exercise of vested options (in shares)						(206,511)
Pre-closing stock repurchase, net of exercise of vested options						$ (125)
Conversion of redeemable convertible preferred stock to common stock (in shares)						(93,121,607)
Conversion of redeemable convertible preferred stock to common stock						$ (249,837)
Mezzanine equity, ending balance (in shares) at Mar. 31, 2021						0
Mezzanine equity, ending balance at Mar. 31, 2021						$ 0
Beginning balance (in shares) at Dec. 31, 2020		52,967,106
Beginning balance at Dec. 31, 2020	$ (146,874)	$ 5	$ 24,424	$ (11)	$ (171,292)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Pre-closing stock repurchase, net of exercise of vested options (in shares)		(1,817,519)
Pre-closing stock repurchase, net of exercise of vested options	(21,902)		(21,902)
Conversion of redeemable convertible preferred stock to common stock (in shares)		93,121,607
Conversion of redeemable convertible preferred stock to common stock	249,837	$ 9	249,828
Repayment of related-party promissory notes associated with vested shares	854		854
Forfeiture of related-party promissory notes (in shares)		(370,734)
Conversion of Series D preferred stock warrants to Class A common warrants	1,160		1,160
Exercise of Class A common stock warrants (in shares)		1,867,292
Exercise of Class A common stock warrants	21,678		21,678
Issuance of common stock upon Merger, net of transaction costs of $16.2 million (in shares)		23,892,244
Issuance of common stock upon Merger, net of transaction costs of $16.2 million	129,659	$ 2	129,657
Issuance of PIPE shares (in shares)		7,500,000
Issuance of PIPE shares	75,000	$ 1	74,999
Issuance of earn-out shares to common stockholders (in shares)		14,153,520
Issuance of earn-out shares to common stockholders	1	$ 1
Exercise of vested stock options (in shares)		37,887
Exercise of vested stock options	80		80
Vesting of early exercised stock options	54		54
Warrant expense in connection with Merger	154		154
Stock-based compensation	34,230		34,230
Other comprehensive loss	(61)			(61)
Net loss	(51,404)				(51,404)
Ending balance (in shares) at Mar. 31, 2021		191,351,403
Ending balance at Mar. 31, 2021	292,466	$ 18	515,216	(72)	(222,696)
Mezzanine equity, beginning balance (in shares) at Dec. 31, 2020						93,328,118
Mezzanine equity, beginning balance at Dec. 31, 2020						$ 249,962
Mezzanine equity, ending balance (in shares) at Sep. 30, 2021						0
Mezzanine equity, ending balance at Sep. 30, 2021						$ 0
Beginning balance (in shares) at Dec. 31, 2020		52,967,106
Beginning balance at Dec. 31, 2020	(146,874)	$ 5	24,424	(11)	(171,292)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(41)
Net loss	(76,498)
Ending balance (in shares) at Sep. 30, 2021		203,817,249
Ending balance at Sep. 30, 2021	355,153	$ 20	602,975	(52)	(247,790)
Mezzanine equity, beginning balance (in shares) at Mar. 31, 2021						0
Mezzanine equity, beginning balance at Mar. 31, 2021						$ 0
Mezzanine equity, ending balance (in shares) at Jun. 30, 2021						0
Mezzanine equity, ending balance at Jun. 30, 2021						$ 0
Beginning balance (in shares) at Mar. 31, 2021		191,351,403
Beginning balance at Mar. 31, 2021	292,466	$ 18	515,216	(72)	(222,696)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs, net of shares withheld for taxes (in shares)		725,740
Exercise of Class A common stock warrants (in shares)		88
Exercise of Class A common stock warrants	1		1
Issuance of common stock upon vesting of RSUs, net of shares withheld for taxes	(1,958)	$ 1	(1,959)
Issuance of common stock for Merger transaction costs of $2.5 million (in shares)		250,000
Issuance of common stock for acquisition of business (in shares)		624,880
Issuance of common stock for acquisition of business	1,949		1,949
Exercise of vested stock options (in shares)		294,374
Exercise of vested stock options	178		178
Vesting of early exercised stock options, net of cancelations, (in shares)		(2,643)
Vesting of early exercised stock options	48		48
Stock-based compensation	9,491		9,491
Other comprehensive loss	32		0	32
Net loss	(9,153)				(9,153)
Ending balance (in shares) at Jun. 30, 2021		193,243,842
Ending balance at Jun. 30, 2021	293,054	$ 19	524,924	(40)	(231,849)
Mezzanine equity, ending balance (in shares) at Sep. 30, 2021						0
Mezzanine equity, ending balance at Sep. 30, 2021						$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs, net of shares withheld for taxes (in shares)		159,247
Conversion of redeemable convertible preferred stock to common stock (in shares)		1,958,615
Conversion of redeemable convertible preferred stock to common stock	16,967		16,967
Issuance of common stock upon vesting of RSUs, net of tax withholdings	(651)		(651)
Issuance of common stock for acquisition of business (in shares)		8,074,935
Issuance of common stock for acquisition of business	50,665	$ 1	50,664
Exercise of vested stock options (in shares)		380,779
Exercise of vested stock options	313		313
Vesting of early exercised stock options, net of cancelations, (in shares)		(169)
Vesting of early exercised stock options	41		41
Stock-based compensation	10,717		10,717
Other comprehensive loss	(12)			(12)
Net loss	(15,941)				(15,941)
Ending balance (in shares) at Sep. 30, 2021		203,817,249
Ending balance at Sep. 30, 2021	355,153	$ 20	602,975	(52)	(247,790)
Beginning balance (in shares) at Dec. 31, 2021		204,791,986
Beginning balance at Dec. 31, 2021	334,619	$ 20	613,687	(137)	(278,951)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs, net of shares withheld for taxes (in shares)		320,296
Payments for taxes related to net share settlement of equity awards	(404)		(404)
Exercise of vested stock options (in shares)		768,727
Exercise of vested stock options	891	$ 1	890
Vesting of early exercised stock options	38		38
Stock-based compensation	9,009		9,009
Other comprehensive loss	(186)			(186)
Net loss	(16,252)				(16,252)
Ending balance (in shares) at Mar. 31, 2022		205,881,009
Ending balance at Mar. 31, 2022	327,715	$ 21	623,220	(323)	(295,203)
Beginning balance (in shares) at Dec. 31, 2021		204,791,986
Beginning balance at Dec. 31, 2021	334,619	$ 20	613,687	(137)	(278,951)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(325)
Net loss	(54,771)
Ending balance (in shares) at Sep. 30, 2022		207,687,203
Ending balance at Sep. 30, 2022	310,946	$ 21	645,109	(462)	(333,722)
Beginning balance (in shares) at Mar. 31, 2022		205,881,009
Beginning balance at Mar. 31, 2022	327,715	$ 21	623,220	(323)	(295,203)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs, net of shares withheld for taxes (in shares)		427,850
Payments for taxes related to net share settlement of equity awards	(779)		(779)
Exercise of vested stock options (in shares)		356,265
Exercise of vested stock options	579		579
Vesting of early exercised stock options	38		38
Issuance of common stock under employee stock purchase plan (in shares)		185,103
Issuance of common stock under employee stock purchase plan	553		553
Stock-based compensation	10,777		10,777
Other comprehensive loss	(145)			(145)
Net loss	(19,679)				(19,679)
Ending balance (in shares) at Jun. 30, 2022		206,850,227
Ending balance at Jun. 30, 2022	319,059	$ 21	634,388	(468)	(314,882)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of RSUs, net of shares withheld for taxes (in shares)		407,448
Payments for taxes related to net share settlement of equity awards	(1,181)		(1,181)
Exercise of vested stock options (in shares)		429,528
Exercise of vested stock options	687		687
Vesting of early exercised stock options	37		37
Stock-based compensation	11,178		11,178
Other comprehensive loss	6			6
Net loss	(18,840)				(18,840)
Ending balance (in shares) at Sep. 30, 2022		207,687,203
Ending balance at Sep. 30, 2022	$ 310,946	$ 21	$ 645,109	$ (462)	$ (333,722)