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Consolidated Statements of Comprehensive (Loss)/Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net (loss)/income	$ (35,655)	$ (10,425)	$ 36,633
Other comprehensive income
Change in unrealized gains/(losses) on available-for-sale debt securities, net of tax			477
Foreign currency translation adjustment, net of income taxes	324	875	(301)
Other comprehensive income	157	478	176
Comprehensive (loss)/income	(35,498)	(9,947)	$ 36,809
WisdomTree Asset Management Canada, Inc [Member]
Other comprehensive income
Reclassification of foreign currency translation adjustment to other gains and losses, net	$ (167)
Wisdom Tree Japan Inc [Member]
Other comprehensive income
Reclassification of foreign currency translation adjustment to other gains and losses, net		$ (397)

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