v3.26.1
Credit Risk (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Concentration Risk [Line Items]          
Receivable from brokers and dealers and clearing organizations $ 11,491,000   $ 11,491,000   $ 8,630,000
Payable to brokers and dealers and clearing organizations 7,649,000   7,649,000   3,363,000
Broker-dealer, self-funded remaining difference between the fail to deliver and fail to receive 3,800,000   3,800,000    
Allowance for doubtful accounts 209,000   209,000   587,000
Accounts receivable, credit loss expense (reversal) (200,000) $ 2,000 (300,000) $ (200,000)  
Allowance for credit losses recorded on available-for-sale debt securities 0   0   0
Credit losses on available-for-sale debt securities $ 0 $ 0 0 $ 0  
Digital Asset Loan Receivable          
Concentration Risk [Line Items]          
Allowance for doubtful accounts         $ 200,000
Accounts receivable, credit loss expense (reversal)     $ (200,000)