Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 129,556	$ 77,353	$ 315,690	$ 211,835
Operating expenses:
Cost of revenue	52,961	32,940	185,566	87,407
Selling and marketing	40,135	30,580	107,357	85,817
Product and technology	14,446	14,437	43,891	44,446
General and administrative	28,659	25,083	77,267	79,979
Provision for (recovery of) doubtful accounts	(6,844)	174	42,111	381
Impairment loss on intangible assets and goodwill	0	57,057	57,232	57,057
Total operating expenses	129,357	160,271	513,424	355,087
Operating income (loss)	199	(82,918)	(197,734)	(143,252)
Other income (expense):
Interest expense	(10,267)	(2,152)	(21,230)	(6,504)
Change in fair value of earnout liability	0	43	0	13,809
Change in fair value of private warrant liability	260	124	620	14,391
Change in fair value of derivatives	510	0	(2,440)	0
Gain on extinguishment of debt	0	0	81,354	0
Investment income and realized gains, net of investment expenses	2,485	335	4,492	775
Other income (expense), net	1,185	70	3,525	(37)
Total other income (expense)	(5,827)	(1,580)	66,321	22,434
Loss before income taxes	(5,628)	(84,498)	(131,413)	(120,818)
Income tax benefit (provision)	(116)	22	(34)	(268)
Net loss	$ (5,744)	$ (84,476)	$ (131,447)	$ (121,086)
Net loss per share - basic (Note 15) (in usd per share)	$ (0.06)	$ (0.86)	$ (1.37)	$ (1.25)
Net loss per share - diluted (Note 15) (in usd per share)	$ (0.06)	$ (0.86)	$ (1.37)	$ (1.25)
Weighted-average shares used in computing net loss attributable per share to common stockholders:
Shares used in computing basic net loss per share (in shares)	96,366,613	97,792,485	95,770,676	97,009,351
Shares used in computing diluted net loss per share (in shares)	96,366,613	97,792,485	95,770,676	97,009,351