| Document and Entity Information | Sep. 29, 2022 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 29, 2022 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-33767 |
| Entity Registrant Name | LL Flooring Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 27-1310817 |
| Entity Address, Address Line One | 4901 Bakers Mill Lane |
| Entity Address, City or Town | Richmond |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23230 |
| City Area Code | 804 |
| Local Phone Number | 463-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | LL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001396033 |
| Amendment Flag | false |
