Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue(1)	$ 275,556	$ 349,049	$ 489,639	$ 571,865
Cost of revenue	175,366	237,813	331,311	408,980
Gross profit	100,190	111,236	158,328	162,885
Operating expenses
Technology and development	47,141	46,822	94,804	92,343
Marketing	33,033	55,922	73,436	98,111
General and administrative	61,765	68,523	131,204	124,664
Restructuring and reorganization	6,106	12,406	7,159	18,115
Total operating expenses	148,045	183,673	306,603	333,233
Loss from continuing operations	(47,855)	(72,437)	(148,275)	(170,348)
Interest income	2,704	554	6,110	774
Interest expense	(1,766)	(2,217)	(3,688)	(4,429)
Income tax expense	(233)	(159)	(643)	(293)
Gain on extinguishment of convertible senior notes	20,083	0	62,353	0
Other expense, net	(145)	(264)	(379)	(2,175)
Net loss from continuing operations	(27,212)	(74,523)	(84,522)	(176,471)
Net (loss) income from discontinued operations	(146)	(3,623)	(3,634)	7,519
Net loss	(27,358)	(78,146)	(88,156)	(168,952)
Dividends on convertible preferred stock	(297)	(350)	(523)	(1,144)
Net loss from continuing operations attributable to common stock—basic and diluted	$ (27,509)	$ (74,873)	$ (85,045)	$ (177,615)
Net loss per share attributable to common stock - basic (in dollars per share)	$ (0.25)	$ (0.70)	$ (0.77)	$ (1.66)
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.25)	$ (0.70)
Net loss attributable to common stock - basic	$ (27,655)	$ (78,496)	$ (88,679)	$ (170,096)
Net loss per share attributable to common stock - basic (in dollars per share)	$ (0.25)	$ (0.73)	$ (0.80)	$ (1.59)
Weighted average shares - basic (in shares)	111,678,417	107,396,575	110,895,358	107,032,381
Weighted-average shares to compute net loss per share attributable to common stock—basic and diluted	111,678,417	107,396,575
Net loss per share attributable to common stock - diluted (in dollars per share)	$ (0.25)	$ (0.73)	$ (0.80)	$ (1.59)
Other comprehensive (loss) income
Foreign currency translation adjustments	$ 0	$ 34	$ (58)	$ 38
Unrealized (loss) gain on available-for-sale debt securities	(17)	217	407	778
Comprehensive loss	$ (27,375)	$ (77,895)	$ (87,807)	$ (168,136)