Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 271,878	$ 148,757	$ 82,558
Cost of revenue	67,384	39,307	37,953
Gross profit	204,494	109,450	44,605
Operating expenses:
Marketing	135,902	58,989	63,156
Selling, general, and administrative	183,634	65,605	55,863
Total operating expenses	319,536	124,594	119,019
Loss from operations	(115,042)	(15,144)	(74,414)
Other income (expense):
Change in fair value of liabilities	3,802	(3,101)	951
Interest expense	0	(10)	(369)
Other income, net	445	268	1,858
Total other income (expense), net	4,247	(2,843)	2,440
Loss before income taxes	(110,795)	(17,987)	(71,974)
Benefit (provision) for income taxes	3,136	(127)	(90)
Net loss	(107,659)	(18,114)	(72,064)
Other comprehensive (loss) income	(126)	(13)	4
Total comprehensive loss	$ (107,785)	$ (18,127)	$ (72,060)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.58)	$ (0.51)	$ (2.07)
Diluted (in dollars per share)	$ (0.58)	$ (0.51)	$ (2.07)
Weighted average shares outstanding:
Basic (in shares)	186,781,537	35,353,809	34,758,817
Diluted (in shares)	186,781,537	35,353,809	34,758,817