Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 976,672	$ 1,099,574	$ 1,058,638
Cost of revenue	646,853	790,455	665,419
Gross profit	329,819	309,119	393,219
Operating expenses
Technology and development	183,294	178,924	143,481
Marketing	117,863	155,309	136,851
General and administrative	238,790	243,390	208,722
Employee termination costs	7,927	32,353	0
Total operating expenses	547,874	609,976	489,054
Loss from continuing operations	(218,055)	(300,857)	(95,835)
Interest income	10,532	6,639	635
Interest expense	(9,524)	(8,886)	(7,491)
Income tax (expense) benefit	(979)	(116)	6,107
Gain on extinguishment of convertible senior notes	94,019	57,193	0
Other (expense) income, net	(2,385)	(3,770)	5,360
Net loss	(130,026)	(321,143)	(109,613)
Dividends on convertible preferred stock	(1,074)	(1,560)	(7,269)
Net loss attributable to common stock—basic	(131,100)	(322,703)	(116,882)
Net loss attributable to common stock—diluted	$ (131,100)	$ (322,703)	$ (116,882)
Net loss per share attributable to common stock—basic (in dollars per share)	$ (1.16)	$ (2.99)	$ (1.12)
Net loss per share attributable to common stock— diluted (in dollars per share)	$ (1.16)	$ (2.99)	$ (1.12)
Weighted average shares of common stock— basic (in shares)	113,152,752	107,927,464	104,683,460
Weighted average shares of common stock— diluted (in shares)	113,152,752	107,927,464	104,683,460
Other comprehensive income
Foreign currency translation adjustments	$ (71)	$ 94	$ 6
Unrealized gain on available-for-sale securities	690	533	379
Comprehensive loss	(129,407)	(320,516)	(109,228)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(126,392)	(249,797)	(91,224)
Net loss from discontinued operations	(3,634)	(71,346)	(18,389)
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic	$ (127,466)	$ (251,357)	$ (98,493)