| Document And Entity Information | Sep. 19, 2024 |
| Document Information [Line Items] | |
| Entity, Registrant Name | ASSOCIATED CAPITAL GROUP, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Sep. 19, 2024 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 1-37387 |
| Entity, Tax Identification Number | 47-3965991 |
| Entity, Address, Address Line One | 191 Mason Street |
| Entity, Address, City or Town | Greenwich |
| Entity, Address, State or Province | CT |
| Entity, Address, Postal Zip Code | 06830 |
| City Area Code | 203 |
| Local Phone Number | 629-9595 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity, Emerging Growth Company | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | AC |
| Security Exchange Name | NYSE |
| Amendment Flag | false |
| Entity, Central Index Key | 0001642122 |
