Vehicle Floorplan Facility - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Jan. 19, 2024
Line Of Credit Facility [Line Items]
Restricted cash		$ 73,234	$ 73,095
2020 Vehicle Floorplan Facility
Line Of Credit Facility [Line Items]
Debt instrument, covenant compliance		As of December 31, 2023 and 2022, the Company was in compliance with all covenants related to the vehicle floorplan facilities.
Vehicle Floorplan Facility
Line Of Credit Facility [Line Items]
Outstanding borrowings		$ 151,200	277,000
Interest expense		$ 19,500	$ 26,800
Weighted average interest rate		10.25%	9.25%
Vehicle Floorplan Facility | Credit Balance Agreements
Line Of Credit Facility [Line Items]
Interest credits earned		$ 13,200	$ 15,900
Vehicle Floorplan Facility | Cash Deposits
Line Of Credit Facility [Line Items]
Restricted cash		$ 22,700	34,600
Ally Bank and Ally Financial | Line Of Credit | 2022 Vehicle Floorplan Facility
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500,000
Line of credit facility, description		the Company may elect to increase its monthly credit line availability by an additional $25.0 million during any four months in the period from November 1, 2022 through March 31, 2024, subject to the maximum $500.0 million credit limit. The 2022 Vehicle Floorplan Facility allows for more flexibility in the Company's borrowing capacity. Consistent with the terms of the 2020 Vehicle Floorplan Facility, the Company and Vroom Automotive, LLC have provided Ally with a guaranty of payment of all amounts owed under the 2022 Vehicle Floorplan Facility as well as a security interest in all or substantially all tangible, intangible, and other personal property of Vroom, Inc., to secure obligations under the 2022 Vehicle Floorplan Facility.
Line of credit facility, current borrowing capacity		$ 253,600	343,900
Line of credit facility, unutilized borrowing capacity		$ 102,400	$ 66,900
Debt instrument, covenant description		The 2022 Vehicle Floorplan Facility bears interest at a rate equal to the Prime Rate, announced per annum by Ally Bank, plus 175 basis points. Additionally, the Company is subject to amended covenants and events of default. The Company is required to maintain a certain level of equity in the vehicles that are financed, to maintain at least 20.0% of the credit line in cash and cash equivalents, and to maintain a minimum required balance with Ally of at least 15.0% of the daily floorplan principal balance outstanding. The Company was required to pay a commitment fee upon execution of the 2022 Vehicle Floorplan Facility.
Maturity Date	Mar. 31, 2024
Additional availability line of credit facility any four months during the maturity period	$ 25,000
Ally Bank and Ally Financial | Line Of Credit | 2022 Vehicle Floorplan Facility | Prime Rate
Line Of Credit Facility [Line Items]
Basis points	175.00%
Ally Bank and Ally Financial | Line Of Credit | 2022 Vehicle Floorplan Facility | Prime Rate | Minimum
Line Of Credit Facility [Line Items]
Debt instrument covenant to maintain minimum percentage of credit line in cash and cash equivalents	20.00%
Debt instrument covenant to maintain principal balance outstanding	15.00%
Ally Bank and Ally Financial | Line Of Credit | 2022 Vehicle Floorplan Facility | Subsequent Events
Line Of Credit Facility [Line Items]
Percentage of outstanding borrowings to be held in cash				40.00%