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NET CAPITAL REQUIREMENTS (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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B. Riley Securities (“BRS”) |  |
Broker-Dealer, Net Capital Requirement [Line Items] |  |
Net capital | $ 146,622 | $ 175,503
Excess capital | 142,616 | 169,458
Required minimum net capital |  | 6,045
B. Riley Wealth Management (“BRWM”) |  |
Broker-Dealer, Net Capital Requirement [Line Items] |  |
Net capital | 4,006 | 11,144
Excess capital | 17,254 | 8,615
Required minimum net capital |  | $ 2,529
National Securities Corporation (“NSC”) |  |
Broker-Dealer, Net Capital Requirement [Line Items] |  |
Net capital | 15,469 |
Excess capital | $ 1,785 |

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- Definition Amount of net capital in excess of minimum required net capital, calculated under Alternative Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
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- Definition Minimum amount of net capital of broker-dealer and its subsidiary, calculated under Alternative Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
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- Definition Amount of net capital of broker-dealer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
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