| Cover | May 25, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 25, 2021 |
| Entity File Number | 001-38818 |
| Entity Registrant Name | CarLotz, Inc. |
| Entity Central Index Key | 0001759008 |
| Entity Tax Identification Number | 83-2456129 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 611 Bainbridge Street |
| Entity Address, Address Line Two | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock [Member] | |
| 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 share [Member] | |
| 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 |
