Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Revenue	$ 218,336	$ 141,406	$ 80,228
Cost of revenue	161,195	108,120	65,492
Gross profit	57,141	33,286	14,736
Sales and marketing	39,422	22,567	14,599
Operations and support	23,683	14,111	10,314
Product development	17,780	12,186	10,637
General and administrative	34,942	12,046	8,016
Impairment of goodwill and intangible assets		1,592	1,719
Total operating expenses	115,827	62,502	45,285
Loss from operations	(58,686)	(29,216)	(30,549)
Other (expenses) income
Interest expense	(852)	(1,089)	(241)
Interest and dividend income	982
Other expenses	(2,866)	(780)	(204)
Income from unconsolidated joint venture	41
Total other expenses	(2,695)	(1,869)	(445)
Net loss	(61,381)	(31,085)	(30,994)
Deemed dividend to preferred stockholders		(8,801)
Net loss attributable to noncontrolling interest	2
Net loss attributable to common stockholders	$ (61,379)	$ (39,886)	$ (30,994)
Net loss per share, basic and diluted	$ (2.33)	$ (5.32)	$ (4.88)
Weighted-average number of shares outstanding used to compute net loss per share, basic and diluted	26,318,349	7,492,876	6,345,498
Comprehensive loss:
Foreign currency translation	$ (61)	$ 210
Total other comprehensive (loss) income	(61)	210
Net loss	(61,381)	(31,085)	$ (30,994)
Comprehensive loss	(61,442)	(30,875)	(30,994)
Comprehensive loss attributable to noncontrolling interest	0
Total comprehensive loss attributable to common stockholders	$ (61,442)	$ (30,875)	$ (30,994)