| Cover | Jun. 18, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 18, 2024 |
| Entity File Number | 1-32026 |
| Entity Registrant Name | Cohen & Co Inc. |
| Entity Central Index Key | 0001270436 |
| Entity Tax Identification Number | 16-1685692 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | Cira Centre |
| Entity Address, Address Line Two | 2929 Arch Street, Suite 1703 |
| Entity Address, City or Town | Philadelphia |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19104 |
| City Area Code | 215 |
| Local Phone Number | 701-9555 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | COHN |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
