Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue	$ 118,927	$ 103,571	$ 335,261	$ 282,857
Cost of revenue	72,678	62,670	206,087	171,321
Gross profit	46,249	40,901	129,174	111,536
Sales and marketing	23,210	21,416	68,315	58,846
Operations and support	12,622	11,620	39,450	36,158
Product development	8,523	7,613	25,570	22,698
General and administrative	14,940	15,126	56,479	43,143
Impairment of assets	151	325	397	444
Total operating expenses	59,446	56,100	190,211	161,289
Loss from operations	(13,197)	(15,199)	(61,037)	(49,753)
Other income (expenses)
Interest expense	(1,205)	(1,194)	(3,596)	(3,172)
Interest and dividend income	2,994	1,344	8,648	1,914
Other expenses	(597)	(289)	(1,156)	(1,733)
Income from unconsolidated joint venture	134	297	437	600
Total other income (expenses)	1,326	158	4,333	(2,391)
Loss before income taxes	(11,871)	(15,041)	(56,704)	(52,144)
(Provision) benefit for income taxes	(139)		(208)	559
Net loss	(12,010)	(15,041)	(56,912)	(51,585)
Net (loss) income attributable to noncontrolling interest	13	(4)	9	17
Net loss attributable to common stockholders	(12,023)	(15,037)	(56,921)	(51,602)
Comprehensive income:
Foreign currency translation	91	(559)	450	(573)
Total other comprehensive income (loss)	91	(559)	450	(573)
Net loss	(12,010)	(15,041)	(56,912)	(51,585)
Comprehensive loss	(11,919)	(15,600)	(56,462)	(52,158)
Comprehensive income attributable to noncontrolling interest	21	14	45	85
Total comprehensive loss attributable to common stockholders	$ (11,940)	$ (15,614)	$ (56,507)	$ (52,243)
Common Class A and Class B [Member]
Earnings Per Share [Abstract]
Net loss per share, basic	$ (0.25)	$ (0.32)	$ (1.19)	$ (1.1)
Net loss per share, diluted	$ (0.25)	$ (0.32)	$ (1.19)	$ (1.1)
Weighted-average number of shares outstanding used to compute net loss per share, basic	47,989,277	47,303,090	47,852,671	47,057,521
Weighted-average number of shares outstanding used to compute net loss per share, diluted	47,989,277	47,303,090	47,852,671	47,057,521