Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands		Total	Common Class A And Class B	Common Stock Common Class A And Class B	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020			391,660
Beginning balance at Dec. 31, 2020		$ 711,359		$ 39	$ 2,101,773	$ (1,390,453)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)			7,282
Stock options exercised		35,359	$ 1		35,358
Stock-based compensation		168,171			168,171
Vesting of restricted stock awards (in shares)			3,054
Common stock withheld for tax obligations and net settlement (in shares)			(1,434)
Common stock withheld related to net share settlement		(57,955)			(57,955)
Net loss		(25,254)				(25,254)
Ending balance (in shares) at Dec. 31, 2021			400,562
Ending balance at Dec. 31, 2021		831,680		40	2,247,347	(1,415,707)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)			2,192
Stock options exercised		9,128			9,128
Stock-based compensation		129,203			129,203
Vesting of restricted stock awards (in shares)			4,717
Common stock withheld for tax obligations and net settlement (in shares)			(1,990)
Common stock withheld related to net share settlement		(20,635)			(20,635)
Repurchases of Class A common stock (in shares)			(8,456)
Repurchases of Class A common stock		(101,721)			(101,721)
Net loss		(32,828)				(32,828)
Ending balance (in shares) at Dec. 31, 2022			397,025
Ending balance at Dec. 31, 2022		814,827		40	2,263,322	(1,448,535)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised (in shares)			1,828
Stock options exercised		6,288			6,288
Stock-based compensation		117,964			117,964
Vesting of restricted stock awards (in shares)			25,008
Vesting and settlement of restricted stock units		3		3
Common stock withheld for tax obligations and net settlement (in shares)			(11,661)
Common stock withheld related to net share settlement		(65,672)		(1)	(65,671)
Repurchases of Class A common stock (in shares)	[1]		(18,433)
Repurchases of Class A common stock	[1]	$ (103,974)		(2)	(103,972)
Employee stock purchase offerings (in shares)		320
Issuance of common stock through employee stock purchase plan		$ 1,390
Net loss		(8,868)				(8,868)
Ending balance (in shares) at Dec. 31, 2023			394,087
Ending balance at Dec. 31, 2023		$ 761,958		$ 40	$ 2,219,321	$ (1,457,403)

[1] Repurchases of Class A common stock for the year ended December 31, 2023 include 12.0 million shares repurchased from related parties (after giving effect to the automatic conversion of Class B common stock to Class A common stock upon such repurchase) for an aggregate consideration of $65.9 million. See "Note 14. Stockholders' Equity" for additional information.