Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Statement of Cash Flows [Abstract]
Net loss	$ (59,741)	$ (22,227)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization expense	6,725	448
Impairment expense	724	0
Restructuring expenses	10,731	0
Amortization and accretion - marketable securities	752	788
Depreciation – lease vehicles	217	30
Provision for doubtful accounts	777	0
Stock-based compensation expense	2,825	45,667
Change in fair value of Merger warrants liability	(4,813)	(12,683)
Change in fair value of earnout shares	(6,616)	(44,056)
Change in Operating Assets and Liabilities:
Accounts receivable	(2,583)	(1,279)
Inventories	9,092	(36,117)
Other current assets	(2,979)	(5,466)
Other assets	20	(4,091)
Accounts payable	(2,426)	2,499
Accrued expenses	(161)	6,187
Accrued expenses – related party	0	(229)
Other current liabilities	(174)	447
Other liabilities	(166)	(582)
Net Cash Used in Operating Activities	(47,796)	(70,664)
Cash Flows from Investing Activities
Purchase of property and equipment	(5,106)	(3,548)
Capitalized website and internal-use software costs	(1,734)	(6,601)
Purchase of marketable securities	(52,072)	(307,560)
Proceeds from sales of marketable securities	114,915	128,954
Purchase of lease vehicles	(1,220)	(344)
Net Cash Provided by (Used in) Investing Activities	54,783	(189,099)
Cash Flows from Financing Activities
Payments made on finance leases	(246)	(18)
Advance from holder of marketable securities	0	4,722
PIPE issuance	0	125,000
Merger financing	0	309,999
Payment made on accrued dividends	0	(4,853)
Payments to existing shareholders of Former CarLotz	0	(62,693)
Transaction costs and advisory fees	0	(47,579)
Payments made on cash considerations associated with stock options	0	(2,465)
Repayment of Paycheck Protection Program loan	0	(1,749)
Payments made on note payable	0	(3,000)
Payments on floor plan notes payable	(82,394)	(29,056)
Borrowings on floor plan notes payable	70,268	52,444
Employee stock option exercise	66	0
Payments made for tax on equity award transactions	(3)	0
Net Cash (Used in) Provided by Financing Activities	(12,309)	340,752
Net Change in Cash and Cash Equivalents Including Restricted Cash	(5,322)	80,989
Cash and cash equivalents and restricted cash, beginning	79,365	2,813
Cash and cash equivalents and restricted cash, ending	74,043	83,802
Supplemental Disclosure of Cash Flow Information
Cash paid for interest	1,163	490
Supplementary Schedule of Non-cash Investing and Financing Activities:
Transfer from lease vehicles to inventory	0	150
KAR/AFC exercise of stock warrants	0	(144)
KAR/AFC conversion of notes payable	0	(3,625)
Convertible redeemable preferred stock tranche obligation expiration	0	(2,832)
Capitalized website and internal use software costs accrued	0	(3,488)
Purchases of property under capital lease obligation	$ (247)	$ (6,504)