| Cover | Sep. 26, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 26, 2023 |
| Entity Registrant Name | HIGHLANDS REIT, INC. |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 000-55580 |
| Entity Tax Identification Number | 81-0862795 |
| Entity Address, Address Line One | 1 South Dearborn Street |
| Entity Address, Address Line Two | 20th Floor |
| Entity Address, City or Town | Chicago |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60603 |
| City Area Code | 312 |
| Local Phone Number | 583-7990 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(g) Security | Common Stock |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001661458 |
