NET CAPITAL REQUIREMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
B. Riley Securities (“BRS”)
Broker-Dealer, Net Capital Requirement [Line Items]
Net capital	$ 146,827	$ 175,503
Excess capital	142,696	169,458
Required minimum net capital		6,045
B. Riley Wealth Management (“BRWM”)
Broker-Dealer, Net Capital Requirement [Line Items]
Net capital	4,131	11,144
Excess capital	11,105	8,615
Required minimum net capital		$ 2,529
National Securities Corporation (“NSC”)
Broker-Dealer, Net Capital Requirement [Line Items]
Net capital	8,780
Excess capital	$ 2,325