CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Total revenue	$ 124,217	$ 115,072	$ 243,843	$ 218,137
Operating expenses:
Operations and technology	35,303	36,720	71,048	69,549
Selling, general, and administrative	41,180	36,144	82,892	72,196
Depreciation and amortization	3,821	2,479	7,106	4,864
Total operating expenses	144,007	139,811	284,467	271,965
Loss from operations	(19,790)	(24,739)	(40,624)	(53,828)
Other income (expense):
Interest income	4,720	638	8,016	682
Interest expense	(451)	(238)	(766)	(448)
Total other income (expense)	4,269	400	7,250	234
Loss before income taxes	(15,521)	(24,339)	(33,374)	(53,594)
Provision for income taxes	61	176	408	416
Net loss	$ (15,582)	$ (24,515)	$ (33,782)	$ (54,010)
Weighted-average number of shares of common stock - Basic	159,463,851	156,703,734	159,090,377	156,484,903
Weighted-average number of shares of common stock - diluted	159,463,851	156,703,734	159,090,377	156,484,903
Net loss per share - basic	$ (0.1)	$ (0.16)	$ (0.21)	$ (0.35)
Net loss per share - diluted	$ (0.1)	$ (0.16)	$ (0.21)	$ (0.35)
Marketplace And Service Cost [Member]
Operating expenses:
Cost of revenue	$ 50,229	$ 49,893	$ 97,804	$ 97,145
Customer Assurance Cost [Member]
Operating expenses:
Cost of revenue	13,474	14,575	25,617	28,211
Marketplace And Service Revenue [Member]
Total revenue	109,360	97,752	214,223	186,099
Customer Assurance Revenue [Member]
Total revenue	$ 14,857	$ 17,320	$ 29,620	$ 32,038