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CLEARING OPERATIONS - Valuation (Details) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
Digital Assets - Safeguarded Assets and Safeguarded Liabilities    
Fair Value $ 6,900,000 $ 51,300,000
Bitcoin    
Digital Assets - Safeguarded Assets and Safeguarded Liabilities    
Number of Units 70 821
Valuation per Unit $ 61,900 $ 42,492
Fair Value $ 4,400,000 $ 34,900,000
Ethereum    
Digital Assets - Safeguarded Assets and Safeguarded Liabilities    
Number of Units 708 6,270
Valuation per Unit $ 3,416 $ 2,282
Fair Value $ 2,400,000 $ 14,300,000
Litecoin    
Digital Assets - Safeguarded Assets and Safeguarded Liabilities    
Number of Units 1,323 16,329
Valuation per Unit $ 75 $ 74
Fair Value $ 100,000 $ 1,200,000
Bitcoin Cash    
Digital Assets - Safeguarded Assets and Safeguarded Liabilities    
Number of Units 95 1,374
Valuation per Unit $ 392 $ 261
Fair Value   $ 400,000
USD Coin    
Digital Assets - Safeguarded Assets and Safeguarded Liabilities    
Number of Units 4,277 506,652
Valuation per Unit $ 1 $ 1
Fair Value   $ 500,000