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EQUITY SECURITIES - Summarized Financial Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Results of Operations    
Net income (loss) $ (10,307) $ 10,123
tZero.com, Inc.    
Results of Operations    
Revenues   740
Pre-tax loss   (5,380)
Net income (loss)   $ (4,380)