CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenue	$ 193,776	$ 175,733	$ 577,842	$ 505,202
Cost of revenue	43,408	43,273	131,453	124,582
Gross profit	150,368	132,460	446,389	380,620
Operating expenses
Research and development	50,411	43,419	155,792	131,146
Sales and marketing	46,093	47,308	141,277	171,377
General and administrative	31,276	28,652	93,201	86,922
Provision for transaction losses	1,795	1,615	4,496	10,863
Total operating expenses	129,575	120,994	394,766	400,308
Income (loss) from operations	20,793	11,466	51,623	(19,688)
Other income, net	8,091	5,766	20,433	52,748
Income before income taxes	28,884	17,232	72,056	33,060
Income tax provision	(1,126)	(895)	(3,636)	(3,547)
Net income	$ 27,758	$ 16,337	$ 68,420	$ 29,513
Net income (loss) per share:
Basic (in dollars per share)	$ 0.21	$ 0.12	$ 0.51	$ 0.22
Diluted (in dollars per share)	$ 0.20	$ 0.12	$ 0.50	$ (0.06)
Weighted-average shares used to compute net income (loss) per share
Basic (in shares)	132,603,307	135,449,848	133,404,102	134,152,107
Diluted (in shares)	139,294,133	137,290,635	140,552,454	135,184,166
Other comprehensive income, net of tax:
Net unrealized holding gain on marketable securities, net	$ 1,751	$ 472	$ 1,017	$ 2,692
Total comprehensive income	$ 29,509	$ 16,809	$ 69,437	$ 32,205