| Document and Entity Information | Mar. 09, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 09, 2023 |
| Entity Registrant Name | HERITAGE GLOBAL INC. |
| Entity Central Index Key | 0000849145 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-39471 |
| Entity Incorporation, State or Country Code | FL |
| Entity Tax Identification Number | 59-2291344 |
| Entity Address, Address Line One | 12625 High Bluff Drive |
| Entity Address, Address Line Two | Suite 305 |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92130 |
| City Area Code | 858 |
| Local Phone Number | 847-0656 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 Par Value |
| Trading Symbol | HGBL |
| Security Exchange Name | NASDAQ |
