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
Total revenue	$ 119,014	$ 105,419	$ 362,857	$ 323,556
Operating expenses:
Operations and technology	35,132	34,328	106,180	103,877
Selling, general, and administrative	40,797	34,701	123,689	106,897
Depreciation and amortization	4,980	3,004	12,086	7,868
Total operating expenses	141,301	130,509	425,768	402,474
Loss from operations	(22,287)	(25,090)	(62,911)	(78,918)
Other income (expense):
Interest income	4,489	1,936	12,505	2,618
Interest expense	(439)	(235)	(1,205)	(683)
Total other income (expense)	4,050	1,701	11,300	1,935
Loss before income taxes	(18,237)	(23,389)	(51,611)	(76,983)
Provision for income taxes	1	279	409	695
Net loss	$ (18,238)	$ (23,668)	$ (52,020)	$ (77,678)
Weighted-average number of shares of common stock - Basic	160,427,987	157,264,153	159,541,286	156,747,507
Weighted-average number of shares of common stock - diluted	160,427,987	157,264,153	159,541,286	156,747,507
Net loss per share - basic	$ (0.11)	$ (0.15)	$ (0.33)	$ (0.5)
Net loss per share - diluted	$ (0.11)	$ (0.15)	$ (0.33)	$ (0.5)
Marketplace And Service Cost [Member]
Operating expenses:
Cost of revenue	$ 47,928	$ 46,255	$ 145,732	$ 143,400
Customer Assurance Cost [Member]
Operating expenses:
Cost of revenue	12,464	12,221	38,081	40,432
Marketplace And Service Revenue [Member]
Total revenue	104,537	90,852	318,760	276,951
Customer Assurance Revenue [Member]
Total revenue	$ 14,477	$ 14,567	$ 44,097	$ 46,605