| Cover Page | Sep. 21, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 21, 2021 |
| Entity Registrant Name | HMG COURTLAND PROPERTIES INC |
| Entity Central Index Key | 0000311817 |
| Entity File Number | 1-7865 |
| Entity Tax Identification Number | 59-1914299 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1870 S. Bayshore Drive |
| Entity Address, Address Line Two | Coconut Grove |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33133 |
| City Area Code | 305 |
| Local Phone Number | 854-6803 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
