CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Total revenue	$ 253,093	$ 260,897	$ 628,865	$ 495,956
Cost of sales	245,486	247,052	602,871	470,099
Total gross profit	7,607	13,845	25,994	25,857
Selling, general and administrative expenses	47,911	43,692	106,291	80,275
Depreciation and amortization	1,083	1,501	2,049	3,034
Loss from operations	(41,387)	(31,348)	(82,346)	(57,452)
Interest expense	1,297	3,388	4,123	6,106
Interest income	(715)	(1,415)	(2,671)	(3,264)
Revaluation of preferred stock warrant	21,260	60	20,470	142
Other income, net	(53)	(12)	(86)	(31)
Loss before provision (benefit) for income taxes	(63,176)	(33,369)	(104,182)	(60,405)
Provision (benefit) for income taxes	52	(29)	105	74
Net loss	(63,228)	(33,340)	(104,287)	(60,479)
Accretion of redeemable convertible preferred stock		(25,879)		(43,843)
Net loss attributable to common stockholders	$ (63,228)	$ (59,219)	$ (104,287)	$ (104,322)
Net loss per share attributable to common stockholders, basic and diluted	$ (2.00)	$ (6.90)	$ (5.21)	$ (12.16)
Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, basic and diluted	31,599,497	8,580,150	20,035,476	8,579,539
Retail vehicle, net
Revenue:
Total revenue	$ 196,150	$ 200,402	$ 504,862	$ 379,152
Wholesale vehicle
Revenue:
Total revenue	50,921	54,531	106,497	106,651
Product, net
Revenue:
Total revenue	5,736	5,491	16,780	9,236
Other
Revenue:
Total revenue	$ 286	$ 473	$ 726	$ 917