Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenues	$ 728,723	$ 590,961	$ 458,338
Operating expenses:
Cost of revenues (excluding depreciation and amortization)	274,482	215,466	174,720
General and administrative expenses	205,419	213,615	189,606
Selling and marketing expenses	288,441	299,238	229,343
Research and development expenses	73,869	69,454	64,474
Depreciation and amortization	51,149	51,878	45,922
Acquisition-related expenses	203	344	1,953
Restructuring expenses	2,845		727
Total operating expenses	896,408	849,995	706,745
Loss from operations	(167,685)	(259,034)	(248,407)
Interest expense	10,939	7,303	7,033
Other expenses / (income)	7,820	13,983	(279)
Gain on extinguishment of debt			(10,000)
Change in fair value of warrants and derivative liabilities		410	5,000
Total other expenses	18,759	21,696	1,754
Loss before income taxes	(186,444)	(280,730)	(250,161)
Income tax provision/(benefit)	1,037	(1,491)	(598)
Net loss	(187,481)	(279,239)	(249,563)
Other comprehensive (income) / loss:
Foreign currency translation adjustment	(35)	(56)	64
Total comprehensive loss	(187,446)	(279,183)	(249,627)
Net loss per share
Net loss	(187,481)	(279,239)	(249,563)
Cumulative redeemable convertible preferred stock dividends			7,060
Net loss available to common stockholders	$ (187,481)	$ (279,239)	$ (256,623)
Basic loss per share	$ (1.2)	$ (2.01)	$ (2.95)
Diluted loss per share	$ (1.2)	$ (2.01)	$ (2.95)
Weighted average number of shares used to compute net loss per share
Denominator for Basic Loss per share-Weighted-average Common Stock	156,697,308	138,985,265	86,932,191
Denominator for Dilutive Loss per share-Weighted-average Common Stock	156,697,308	138,985,265	86,932,191