Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue:
Revenue from fees, net	$ 143,689	$ 258,345	$ 260,830	$ 572,327
Interest income	33,916	28,974	79,231	44,108
Interest expense	(4,282)	(2,313)	(11,414)	(3,272)
Fair value and other adjustments	(37,557)	(56,844)	(89,954)	(74,865)
Total interest income and fair value adjustments, net	(7,923)	(30,183)	(22,137)	(34,029)
Total revenue	135,766	228,162	238,693	538,298
Operating expenses:
Sales and marketing	23,891	105,212	55,329	238,661
Customer operations	36,797	51,072	77,387	99,479
Engineering and product development	57,974	57,045	168,045	107,036
General, administrative, and other	50,448	46,940	103,111	90,396
Total operating expenses	169,110	260,269	403,872	535,572
Income (loss) from operations	(33,344)	(32,107)	(165,179)	2,726
Other income, net	5,197	2,260	7,794	138
Net income (loss) before income taxes	(28,147)	(29,847)	(157,385)	2,864
Provision for income taxes	18	24	34	43
Net income (loss)	$ (28,165)	$ (29,871)	$ (157,419)	$ 2,821
Net income (loss) per share, basic (in dollars per share)	$ (0.34)	$ (0.36)	$ (1.91)	$ 0.03
Net income (loss) per share, diluted (in dollars per share)	$ (0.34)	$ (0.36)	$ (1.91)	$ 0.03
Weighted-average number of shares outstanding used in computing net income (loss) per share, basic (in shares)	83,130,638	83,833,963	82,524,403	84,031,109
Weighted-average number of shares outstanding used in computing net income (loss) per share, diluted (in shares)	83,130,638	83,833,963	82,524,403	94,509,060