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NET LOSS PER SHARE - Computation of loss per share and weighted average of the company's common stock outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
NET LOSS PER SHARE    
Net loss attributable to Binah Capital Group, Inc. $ (5,292) $ 571
Weighted-average shares for basic 16,593  
Weighted-average shares for diluted 16,593  
Net loss per share basic (in dollars per share) $ (0.32)  
Net loss per share diluted (in dollars per share) $ (0.32)