| Document and Entity Information | Aug. 13, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 13, 2021 |
| Entity Registrant Name | SCOTT’S LIQUID GOLD-INC. |
| Entity Central Index Key | 0000088000 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-13458 |
| Entity Incorporation, State or Country Code | CO |
| Entity Tax Identification Number | 84-0920811 |
| Entity Address, Address Line One | 8400 E. Crescent Parkway |
| Entity Address, Address Line Two | Suite 450 |
| Entity Address, City or Town | Greenwood Village |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80111 |
| City Area Code | (303) |
| Local Phone Number | 373-4860 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
