Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 1,922,765	$ 886,093	$ 779,796
Cost of revenue	1,518,945	653,983	635,693
Gross profit	403,820	232,110	144,103
Operating expenses
Technology and development	156,718	84,297	69,765
Marketing	138,740	54,881	76,710
General and administrative	218,315	92,140	76,874
Total operating expenses	513,773	231,318	223,349
(Loss) income from operations	(109,953)	792	(79,246)
Interest income	635	2,074	7,146
Interest expense	(11,762)	(19,495)	(8,928)
Income tax benefit	(6,107)	0	0
Other income (expense), net	5,360	(1,898)	223
Net loss	(109,613)	(18,527)	(80,805)
Dividends on convertible preferred stock	(7,269)	(4,454)	0
Net loss attributable to common stock—basic	(116,882)	(22,981)	(80,805)
Net loss attributable to common stock—diluted	$ (116,882)	$ (22,981)	$ (80,805)
Net loss per share attributable to common stock—basic (in dollars per share)	$ (1.12)	$ (0.23)	$ (0.88)
Net loss per share attributable to common stock— diluted (in dollars per share)	$ (1.12)	$ (0.23)	$ (0.88)
Weighted average shares of common stock— basic (in shares)	104,683,460	98,574,529	91,583,533
Weighted average shares of common stock— diluted (in shares)	104,683,460	98,574,529	91,583,533
Other comprehensive income
Foreign currency translation adjustments	$ 6	$ (3)	$ 33
Unrealized gain on available-for-sale securities	379	172	9
Comprehensive loss	(109,228)	(18,358)	(80,763)
Service
Revenue	1,042,112	674,345	539,288
Cost of revenue	648,660	437,484	390,504
Product
Revenue	880,653	211,748	240,508
Cost of revenue	$ 870,285	$ 216,499	$ 245,189