Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue	$ 213,665	$ 197,780	$ 404,660	$ 307,922
Cost of revenue	167,626	149,434	345,742	256,821
Gross profit	46,039	48,346	58,918	51,101
Operating expenses
Technology and development	17,961	16,063	38,235	31,620
Marketing	9,482	27,050	35,190	60,250
General and administrative(1)	23,022	17,654	47,349	39,102
Total operating expenses	50,465	60,767	120,774	130,972
Loss from operations	(4,426)	(12,421)	(61,856)	(79,871)
Interest income	437	1,913	1,540	4,229
Interest expense	(2,665)	(2,153)	(5,109)	(4,290)
Other income (expense), net	43	36	(1,303)	128
Net loss	(6,611)	(12,625)	(66,728)	(79,804)
Dividend on convertible preferred stock	(1,284)	0	(1,284)	0
Net Income (Loss) Available to Common Stockholders, Basic	$ (7,895)	$ (12,625)	$ (68,012)	$ (79,804)
Net loss per share attributable to common stock—basic and diluted (in dollars per share)	$ (0.08)	$ (0.14)	$ (0.71)	$ (0.88)
Weighted average shares of common stock - basic and diluted (in shares)	98,785,318	91,216,886	96,114,012	90,915,334
Other comprehensive income (loss)
Net loss	$ (6,611)	$ (12,625)	$ (66,728)	$ (79,804)
Foreign currency translation adjustments	3	37	(22)	38
Unrealized gain (loss) on available-for-sale securities	(137)	6	421	6
Total comprehensive loss	(6,745)	(12,582)	(66,329)	(79,760)
GovernmentCreditForEmployeeRetention			1,292
COVID-19 [Member]
Other comprehensive income (loss)
Restructuring Costs			7,525
Service
Revenue	141,135	157,872	252,613	246,641
Cost of revenue	93,891	108,528	192,259	192,923
Product
Revenue	72,530	39,908	152,047	61,281
Cost of revenue	$ 73,735	$ 40,906	$ 153,483	$ 63,898