CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total revenue	$ 115,072	$ 97,374	$ 218,137	$ 166,460
Operating expenses:
Operations and technology	36,720	23,513	69,549	45,104
Selling, general, and administrative	36,144	27,513	72,196	51,478
Depreciation and amortization	2,479	1,761	4,864	3,529
Total operating expenses	139,811	106,704	271,965	192,923
Loss from operations	(24,739)	(9,330)	(53,828)	(26,463)
Other income (expense):
Interest income	638	45	682	71
Interest expense	(238)	(251)	(448)	(461)
Total other income (expense)	400	(206)	234	(390)
Loss before income taxes	(24,339)	(9,536)	(53,594)	(26,853)
Provision for income taxes	176	156	416	214
Net loss	$ (24,515)	$ (9,692)	$ (54,010)	$ (27,067)
Weighted-average shares-basic	156,703,734	154,572,225	156,484,903	94,762,407
Weighted-average shares-diluted	156,703,734	154,572,225	156,484,903	94,762,407
Net loss per share - basic	$ (0.16)	$ (0.06)	$ (0.35)	$ (0.29)
Net loss per share - diluted	$ (0.16)	$ (0.06)	$ (0.35)	$ (0.29)
Marketplace And Service Cost [Member]
Operating expenses:
Cost of revenue	$ 49,893	$ 42,788	$ 97,145	$ 72,297
Customer Assurance Cost [Member]
Operating expenses:
Cost of revenue	14,575	11,129	28,211	20,515
Marketplace And Service Revenue [Member]
Total revenue	97,752	83,934	186,099	142,326
Customer Assurance Revenue [Member]
Total revenue	$ 17,320	$ 13,440	$ 32,038	$ 24,134