Condensed Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($)	Total	Class A and Class B Common Stock	Common Stock Class A and Class B Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 711,359,000		$ 39,000	$ 2,101,773,000	$ (1,390,453,000)
Beginning balance at Dec. 31, 2020		391,660,000
Stock options exercised	2,680,000			2,680,000
Stock options exercised, Shares		513,000
Stock-based compensation	48,254,000			48,254,000
Vesting of restricted stock awards, Shares		608,000
Common stock withheld for tax obligations and net settlement	(14,902,000)			(14,902,000)
Common stock withheld for tax obligations and net settlement, Shares		(324,000)
Net income	1,668,000				1,668,000
Ending balance at Mar. 31, 2021	749,059,000		39,000	2,137,805,000	(1,388,785,000)
Ending balance at Mar. 31, 2021		392,457,000
Beginning balance at Dec. 31, 2021	831,680,000		40,000	2,247,347,000	(1,415,707,000)
Beginning balance at Dec. 31, 2021		400,562,000
Stock options exercised	3,699,000			3,699,000
Stock options exercised, Shares		749,000
Stock-based compensation	32,161,000			32,161,000
Vesting of restricted stock units		$ 822,000
Common stock withheld for tax obligations and net settlement	(9,561,000)			(9,561,000)
Common stock withheld for tax obligations and net settlement, Shares		(364,000)
Repurchases of Class A common stock	(83,765,000)			(83,765,000)
Repurchases of Class A common stock, shares		(5,637,000)
Net income	12,293,000				12,293,000
Ending balance at Mar. 31, 2022	$ 786,507,000		$ 40,000	$ 2,189,881,000	$ (1,403,414,000)
Ending balance at Mar. 31, 2022		396,132,000