| Cover Page | Aug. 23, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 27, 2021 |
| Entity Registrant Name | Remark Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-33720 |
| Entity Tax Identification Number | 33-1135689 |
| Entity Address, Address Line One | 800 S. Commerce Street |
| Entity Address, City or Town | Las Vegas |
| Entity Address, State or Province | NV |
| Entity Address, Postal Zip Code | 89106 |
| City Area Code | 702 |
| Local Phone Number | 701-9514 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value per share |
| Trading Symbol | MARK |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001368365 |
| Amendment Flag | false |
