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Fair Value of Financial Instruments - Schedule of Fair Value by Using Key Inputs (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Assets:      
Digital assets held for other parties   $ 908,000
Marketable securities $ 49,000 115,000 403,000
Digital assets 787,000 1,016,000 2,097,000
Liabilities:      
Liability related to digital assets held for other parties   916,000
BTC Note     14,868,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Recurring [Member]      
Assets:      
Digital assets held for other parties     908,000
Marketable securities 49,000 115,000 403,000
Digital assets 787,000 1,016,000  
Liabilities:      
Liability related to digital assets held for other parties     916,000
BTC Note     14,868,000
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Recurring [Member]      
Assets:      
Digital assets held for other parties    
Marketable securities
Digital assets  
Liabilities:      
Liability related to digital assets held for other parties    
BTC Note    
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member]      
Assets:      
Digital assets held for other parties    
Marketable securities
Digital assets  
Liabilities:      
Liability related to digital assets held for other parties    
BTC Note