Credit Risk (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Concentration Risk [Line Items] | |||||
| Receivable from brokers and dealers and clearing organizations | $ 137,347,000 | $ 137,347,000 | $ 8,630,000 | ||
| Payable to brokers and dealers and clearing organizations | 90,989,000 | 90,989,000 | 3,363,000 | ||
| Broker-dealer, self-funded remaining difference between the fail to deliver and fail to receive | 46,400,000 | 46,400,000 | |||
| Allowance for doubtful accounts | 113,000 | 113,000 | 587,000 | ||
| Accounts receivable, credit loss expense (reversal) | (100,000) | $ 3,000 | (400,000) | $ (200,000) | |
| Allowance for credit losses recorded on available-for-sale debt securities | 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) | ||||
| X | ||||||||||
- Definition Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Broker-Dealer, Self-Funded Remaining Difference Between Fail To Deliver And Fail To Receive No definition available.
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of expense for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), for which no credit loss was previously recorded. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|