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Leases - Additional Information (Detail) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 21, 2024 | Dec. 31, 2019 | Jan. 01, 2019
Right of use asset |  | $ 18,161 | $ 19,827
Lease liability |  | $ 22,739 | $ 24,817
Operating lease notice to landlord before cancellation |  | 12 months |
Scenario, Forecast [Member] |  |  |
Operating lease cancellation cost | $ 4,236 |  |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

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- Definition Amount of Operating Lease Cancellation Cost. + References No definition available. + Details
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- Definition Operating Lease Notice to Landlord Before Cancellation. + References No definition available. + Details
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Namespace Prefix: | wetf_
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |