Fair Value Measurements (Details) - Schedule of Assets and Liabilities Measured at Fair Value - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
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.