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v3.25.3

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jun. 02, 2025 | Apr. 07, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Amortization of intangible assets |  |  | $ 5,700 | $ 5,900 | $ 16,599 | $ 17,710
B Riley Financial Inc. [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Date of acquisition |  | Apr. 07, 2025 |  |  |  |
Bryan Garnier [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Date of acquisition | Jun. 02, 2025 |  |  |  |  |
Liability for estimated earn-out payments | $ 25,000 |  |  |  |  |
Estimated future operating results | 5 years |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Weighted-average remaining lives of intangible assets |  |  | 8 years 9 months 18 days |  | 8 years 9 months 18 days |
Trade Names [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Weighted-average remaining lives of intangible assets |  |  | 5 years 7 months 6 days |  | 5 years 7 months 6 days |
Non-Compete Agreements [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Weighted-average remaining lives of intangible assets |  |  | 3 years 3 months 18 days |  | 3 years 3 months 18 days |
Acquired Technology [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Weighted-average remaining lives of intangible assets |  |  | 8 years 1 month 6 days |  | 8 years 1 month 6 days |
Investment Banking Backlog [Member] |  |  |  |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |  |  |  |
Weighted-average remaining lives of intangible assets |  |  | 4 months 24 days |  | 4 months 24 days |

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