Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands		12 Months Ended
	Jan. 21, 2021 shares	Dec. 31, 2021 USD ($) position mi	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Earnout shares (up to) (in shares) | shares	6,945,732
Restricted cash | $		$ 4,336	$ 605
Customer vehicle exchange policy, after delivery, period		3 days
Customer vehicle exchange policy, after delivery, miles | mi		500
Advertising expense | $		$ 21,804	$ 3,199	$ 3,803
Reportable segment | position		1
Computer Software, Intangible Asset
Finite-Lived Intangible Assets [Line Items]
Useful life		3 years
Minimum
Finite-Lived Intangible Assets [Line Items]
Lease term		1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Lease term		4 years
Leasehold Improvements | Maximum
Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives		15 years
Equipment, Furniture and Fixtures | Minimum
Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives		1 year
Equipment, Furniture and Fixtures | Maximum
Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives		5 years
Equipment | Minimum
Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives		1 year
Equipment | Maximum
Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives		5 years
Corporate Vehicles
Finite-Lived Intangible Assets [Line Items]
Property and equipment, useful lives		5 years
Common Stock
Finite-Lived Intangible Assets [Line Items]
Earnout shares (up to) (in shares) | shares	7,500,000