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Contingent Payments - Additional Information (Detail) $ in Thousands, $ in Thousands			12 Months Ended
	Feb. 19, 2020 USD ($)	Feb. 19, 2020 CAD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	May 04, 2020 USD ($)	Feb. 19, 2020 CAD ($)
Recognized gain loss on sale of business			$ 0	$ 787	$ 2,877
WisdomTree Asset Management Canada, Inc [Member]
Contingent payments			0	0
Proceeds from divestiture of businesses	$ 2,774	$ 3,720
Additional consideration payable	$ 2,360						$ 3,000
Recognized gain loss on sale of business				787	$ 2,877
WisdomTree Asset Management Canada, Inc [Member] | Maximum [Member]
Additional consideration payable							4,000
WisdomTree Asset Management Canada, Inc [Member] | Minimum [Member]
Additional consideration payable							$ 0
Advisor Engine [Member]
Maximum amount of contingent payments that may be received						$ 10,408
Contingent payments			0	0
Contingent payments received			$ 0	$ 0
Advisor Engine [Member] | Fair Value Of Upfront Consideration Received [Member]
Fair value of upfront consideration received						$ 9,592

X

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2443-110228

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

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X

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

+ Details

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X

- Definition

Contingent payments.

+ References

No definition available.

+ Details

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X

- Definition

Contingent payments received.

+ References

No definition available.

+ Details

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X

- Definition

Fair value of upfront consideration received.

+ References

No definition available.

+ Details

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Namespace Prefix:	wetf_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Maximum amount of contingent payments that may be received.

+ References

No definition available.

+ Details

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- Details

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