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ACQUISITIONS - Pro forma (Details) - Targus - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022
Business Acquisition [Line Items] |  |
Revenues | $ 233,834 | $ 575,121
Net loss | (135,394) | (142,707)
Net loss attributable to B. Riley Financial, Inc. | (138,965) | (147,144)
Net loss attributable to common shareholders | $ (140,967) | $ (151,148)

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