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Fair Value Measurements - Summary of Categorization of Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Liabilities: |  |
Deferred consideration (Note 10) | $ 179,831 | $ 200,290
Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 336 | 930
Total | 148,018 | 148,590
Liabilities: |  |
Deferred consideration (Note 10) | 179,831 | 200,290
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 4,901 |
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 4,937 |
Fair Value, Measurements, Recurring [Member] | Fixed Income Investments [Member] |  |
Assets: |  |
Other assets fair value disclosure | 1,915 |
Fair Value, Measurements, Recurring [Member] | Other Investment Companies [Member] |  |
Assets: |  |
Other assets fair value disclosure | 660 |
Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 10,051 | 14,500
Fair Value, Measurements, Recurring [Member] | ETFs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 33,728 | 23,772
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 2,993 | 2,980
Fair Value, Measurements, Recurring [Member] | Pass-through GSEs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 81,046 | 96,837
Fair Value, Measurements, Recurring [Member] | Other assets—seed capital (WisdomTree blockchain-enabled funds) [Member] |  |
Assets: |  |
Financial instruments owned, at fair value |  | 1,765
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |  |
Assets: |  |
Financial instruments owned, at fair value |  | 885
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 | 3,588 |
Fnality Convertible Note [Member] | Fair Value, Measurements, Recurring [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 7,451 | 6,921
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 336 | 930
Total | 70,247 | 50,972
Liabilities: |  |
Deferred consideration (Note 10) | 0 | 0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 4,901 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 4,937 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Fixed Income Investments [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment Companies [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 0 | 0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | ETFs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 33,728 | 23,772
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 2,993 | 2,980
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Pass-through GSEs [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 23,352 | 23,290
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Other assets—seed capital (WisdomTree blockchain-enabled funds) [Member] |  |
Assets: |  |
Financial instruments owned, at fair value |  | 0
Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [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 | 0
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 0 | 0
Total | 60,269 | 76,197
Liabilities: |  |
Deferred consideration (Note 10) | 0 | 0
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Fixed Income Investments [Member] |  |
Assets: |  |
Other assets fair value disclosure | 1,915 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment Companies [Member] |  |
Assets: |  |
Other assets fair value disclosure | 660 |
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 0 | 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] | US Treasury Securities [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 | 57,694 | 73,547
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Other assets—seed capital (WisdomTree blockchain-enabled funds) [Member] |  |
Assets: |  |
Financial instruments owned, at fair value |  | 1,765
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |  |
Assets: |  |
Financial instruments owned, at fair value |  | 885
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 | 0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Cash equivalents | 0 | 0
Total | 17,502 | 21,421
Liabilities: |  |
Deferred consideration (Note 10) | 179,831 | 200,290
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Fixed Income Investments [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Other Investment Companies [Member] |  |
Assets: |  |
Other assets fair value disclosure | 0 |
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Securrency Convertible Note [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | 10,051 | 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] | US Treasury Securities [Member] |  |
Assets: |  |
Financial instruments owned, at fair value | 0 | 0
Other assets fair value disclosure | 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] | Other assets—seed capital (WisdomTree blockchain-enabled funds) [Member] |  |
Assets: |  |
Financial instruments owned, at fair value |  | 0
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bonds [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 | 3,588 |
Level 3 [Member] | Fnality Convertible Note [Member] | Fair Value, Measurements, Recurring [Member] |  |
Investments in Convertible Notes |  |
Investments, Fair value disclosure | $ 7,451 | $ 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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- Definition Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5D -Subparagraph (SX 210.12-13D(Column C)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column C)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010 + Details
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