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Fair Value Measurements (Details) - Schedule of Assets and Liabilities Measured at Fair Value - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements |  | $ 8,764 | $ 9,684
Fair Value, Recurring [Member] | ETFs [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 54,677 |
Fair Value, Recurring [Member] | ETFs [Member] | Level 1 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 54,677 |
Fair Value, Recurring [Member] | ETFs [Member] | Level 2 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | ETFs [Member] | Level 3 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] |  |  |
Recurring fair value measurements: |  |  |
Cash equivalents |  | 58,371 | 50,226
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  | 135,712 | 108,948
Fair Value, Recurring [Member] | Level 1 [Member] |  |  |
Recurring fair value measurements: |  |  |
Cash equivalents |  | 58,371 | 50,226
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  | 122,103 | 92,752
Fair Value, Recurring [Member] | Level 2 [Member] |  |  |
Recurring fair value measurements: |  |  |
Cash equivalents |  |  |
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  | 13,609 | 16,196
Fair Value, Recurring [Member] | Level 3 [Member] |  |  |
Recurring fair value measurements: |  |  |
Cash equivalents |  |  |
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  |  |
Fair Value, Recurring [Member] | ETFs [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  | 35,181
Fair Value, Recurring [Member] | ETFs [Member] | Level 1 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  | 35,181
Fair Value, Recurring [Member] | ETFs [Member] | Level 2 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | ETFs [Member] | Level 3 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | Pass-through GSEs [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 7,332 | 10,240
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | Level 1 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | Level 2 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 7,332 | 10,240
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | Level 3 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | U.S. treasuries [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 5,364 | 5,007
Fair Value, Recurring [Member] | U.S. treasuries [Member] | Level 1 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | U.S. treasuries [Member] | Level 2 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 5,364 | 5,007
Fair Value, Recurring [Member] | U.S. treasuries [Member] | Level 3 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | Equities [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 8,022 | 6,337
Fair Value, Recurring [Member] | Equities [Member] | Level 1 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 8,022 | 6,337
Fair Value, Recurring [Member] | Equities [Member] | Level 2 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | Equities [Member] | Level 3 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Recurring [Member] | Fixed income [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 1,946 | 1,957
Fair Value, Recurring [Member] | Fixed income [Member] | Level 1 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 1,033 | 1,008
Fair Value, Recurring [Member] | Fixed income [Member] | Level 2 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  | 913 | 949
Fair Value, Recurring [Member] | Fixed income [Member] | Level 3 [Member] |  |  |
Financial instruments owned, at fair value: |  |  |
Financial instruments owned, at fair value |  |  |
Fair Value, Nonrecurring [Member] |  |  |
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  |  | 9,684
Fair Value, Nonrecurring [Member] | Level 1 [Member] |  |  |
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  |  |
Fair Value, Nonrecurring [Member] | Level 2 [Member] |  |  |
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  |  |
Fair Value, Nonrecurring [Member] | Level 3 [Member] |  |  |
Other assets—seed capital (WisdomTree Digital Funds): |  |  |
Total |  |  | 9,684
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [1] | 8,288 |
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] | Level 1 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [1] |  |
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] | Level 2 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [1] |  |
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] | Level 3 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [1] | $ 8,288 |
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [2] |  | 9,684
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] | Level 1 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [2] |  |
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] | Level 2 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [2] |  |
Fair Value, Nonrecurring [Member] | Fnality International Limited—Series B-1 Preference Shares [Member] | Level 3 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [2] |  | 9,684
Fair Value, Nonrecurring [Member] | Other Investments [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [3] |  |
Fair Value, Nonrecurring [Member] | Other Investments [Member] | Level 1 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [3] |  |
Fair Value, Nonrecurring [Member] | Other Investments [Member] | Level 2 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [3] |  |
Fair Value, Nonrecurring [Member] | Other Investments [Member] | Level 3 [Member] |  |  |
Non-recurring fair value measurements: |  |  |
Non-recurring fair value measurements | [3] |  |
[1] | Fair value determined on June 17, 2024. Not included above are prospective changes in value due to fluctuations in the British pound to U.S. dollar exchange rate.
[2] | Fair value determined on October 31, 2023.
[3] | Fair value determined on September 30, 2023.

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