CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 323,005	$ 340,273	$ 951,871	$ 836,229
Cost of sales	297,560	324,602	900,432	794,701
Total gross profit	25,445	15,671	51,439	41,528
Selling, general and administrative expenses	61,127	50,934	167,418	131,209
Depreciation and amortization	1,191	1,517	3,239	4,551
Loss from operations	(36,873)	(36,780)	(119,218)	(94,232)
Interest expense	2,259	3,797	6,382	9,903
Interest income	(1,289)	(1,190)	(3,960)	(4,454)
Revaluation of preferred stock warrant		373	20,470	515
Other income, net	(26)	(44)	(111)	(75)
Loss before provision for income taxes	(37,817)	(39,716)	(141,999)	(100,121)
Provision for income taxes	33	48	138	122
Net loss	(37,850)	(39,764)	(142,137)	(100,243)
Accretion of redeemable convertible preferred stock		(65,686)		(109,529)
Net loss attributable to common stockholders	$ (37,850)	$ (105,450)	$ (142,137)	$ (209,772)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.31)	$ (12.24)	$ (2.65)	$ (24.42)
Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, basic and diluted	121,123,472	8,615,682	53,731,475	8,591,554
Retail vehicle, net
Revenue:
Total revenue	$ 249,518	$ 273,743	$ 754,380	$ 652,895
Wholesale vehicle
Revenue:
Total revenue	63,972	59,054	170,469	165,705
Product, net
Revenue:
Total revenue	9,198	7,029	25,979	16,265
Other
Revenue:
Total revenue	$ 317	$ 447	$ 1,043	$ 1,364