| Cover | May 22, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 22, 2024 |
| Entity File Number | 001-41991 |
| Entity Registrant Name | Binah Capital Group, Inc. |
| Entity Central Index Key | 0001953984 |
| Entity Tax Identification Number | 88-3276689 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 80 State Street |
| Entity Address, City or Town | Albany |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 12207 |
| City Area Code | 212 |
| Local Phone Number | 404-7002 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock, par value $0.0001 per share [Member] | |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | BCG |
| Security Exchange Name | NASDAQ |
| Warrants, each exercisable for one share of Common Stock at an exercise price of $11.50 per share [Member] | |
| Title of 12(b) Security | Warrants, each exercisable for one share of Common Stock at an exercise price of $11.50 per share |
| Trading Symbol | BCGWW |
| Security Exchange Name | NASDAQ |
