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Fair Value Measurements - Summary of Categorization of Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Liabilities: |  |
Deferred consideration (Note 10) | $ 200,290 | $ 228,062
Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 930 | 11,488
Total | 148,590 | 138,654
Liabilities: |  |
Deferred consideration (Note 10) | 200,290 | 228,062
Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 14,500 |
Fair Value, Measurements, Recurring [Member] | ETFs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 23,772 | 18,812
Fair Value, Measurements, Recurring [Member] | Pass-through GSEs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 96,837 | 106,245
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 885 | 2,109
Fair Value, Measurements, Recurring [Member] | U.S. treasuries |  |
Assets: |  |
Financial instruments owned, at fair value | 2,980 |
Fair Value, Measurements, Recurring [Member] | Other Assets Seed Capital [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 1,765 |
Fair Value, Measurements, Nonrecurring [Member] | Other Investments [Member] |  |
Assets: |  |
Investment owned, at fair value | 312 |
Securrency - Series A convertible preferred stock | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Investment owned, at fair value |  | 8,488
Fnality Convertible Note [Member] | Fair Value, Measurements, Recurring [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 6,921 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 930 | 11,488
Total | 50,972 | 55,020
Liabilities: |  |
Deferred consideration (Note 10) | 0 | 0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 0 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | ETFs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 23,772 | 18,812
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Pass-through GSEs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 23,290 | 24,720
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 | 0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. treasuries |  |
Assets: |  |
Financial instruments owned, at fair value | 2,980 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Other Assets Seed Capital [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 |
Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Investments [Member] |  |
Assets: |  |
Investment owned, at fair value | 0 |
Level 1 [Member] | Securrency - Series A convertible preferred stock | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Investment owned, at fair value |  | 0
Level 1 [Member] | Fnality Convertible Note [Member] | Fair Value, Measurements, Recurring [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 0 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 0 | 0
Total | 76,197 | 83,634
Liabilities: |  |
Deferred consideration (Note 10) | 0 | 0
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 0 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | ETFs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 | 0
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Pass-through GSEs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 73,547 | 81,525
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 885 | 2,109
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. treasuries |  |
Assets: |  |
Financial instruments owned, at fair value | 0 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Assets Seed Capital [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 1,765 |
Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Investments [Member] |  |
Assets: |  |
Investment owned, at fair value | 0 |
Level 2 [Member] | Securrency - Series A convertible preferred stock | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Investment owned, at fair value |  | 0
Level 2 [Member] | Fnality Convertible Note [Member] | Fair Value, Measurements, Recurring [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 0 |
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 0 | 0
Total | 21,421 | 0
Liabilities: |  |
Deferred consideration (Note 10) | 200,290 | 228,062
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 14,500 |
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | ETFs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 | 0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Pass-through GSEs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 | 0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 | 0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | U.S. treasuries |  |
Assets: |  |
Financial instruments owned, at fair value | 0 |
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Other Assets Seed Capital [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 |
Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Investments [Member] |  |
Assets: |  |
Investment owned, at fair value | 312 |
Level 3 [Member] | Securrency - Series A convertible preferred stock | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Investment owned, at fair value |  | $ 8,488
Level 3 [Member] | Fnality Convertible Note [Member] | Fair Value, Measurements, Recurring [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | $ 6,921 |

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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