Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 11, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-38818
Entity Registrant Name	CarLotz, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-2456129
Entity Address, Address Line One	611 Bainbridge Street, Suite 100
Entity Address, City or Town	Richmond
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23224
City Area Code	804
Local Phone Number	728-3833
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 334.9
Entity Common Stock, Shares Outstanding		114,089,787
Documents Incorporated by Reference	Certain sections of the registrant’s Proxy Statement to be filed with the Securities and Exchange Commission in connection with the 2022 Annual Meeting of Stockholders or Annual Report on Form 10-K/A, to be filed with the Securities and Exchange Commission within 120 days after the close of the registrant’s fiscal year, are incorporated by reference in Part III of this Form 10-K. With the exception of those sections that are specifically incorporated by reference in this Annual Report on Form 10-K, such Proxy Statement shall not be deemed filed as part of this Report or incorporated by reference herein.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001759008
Common Class A
Document Information [Line Items]
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	LOTZ
Security Exchange Name	NASDAQ
Redeemable warrants, exercisable for Class A common stock at an exercise price of $11.50 per shar
Document Information [Line Items]
Title of 12(b) Security	Redeemable warrants, exercisable for Class A common stock at an exercise price of $11.50 per share
Trading Symbol	LOTZW
Security Exchange Name	NASDAQ