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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
May 21, 2024
Summary of Significant Accounting Policies [Line Items]      
Liquid insured deposits $ 23.9 $ 15.4  
Commissions receivable 4.5 1.3  
Good faith deposits 0.5 0.6  
Contract liabilities 4.0 1.1  
Contract liabilities recognized 0.8 0.2  
Recognized revenue included in contract liabilities 0.3 $ 0.2  
Interest received $ 19.2    
American Ventures IM LLC and American Ventures Manager LLC [Member]      
Summary of Significant Accounting Policies [Line Items]      
Ownership interests 90.00%    
Dominari Financial Heritage Strategies LLC [Member]      
Summary of Significant Accounting Policies [Line Items]      
Ownership interests     50.00%
Dominari Securities [Member]      
Summary of Significant Accounting Policies [Line Items]      
Liquid insured deposits $ 28.9