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Deferred Consideration - Schedule of Deferred Consideration (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Contractual gold payments | $ 4,105 | $ 4,250 | $ 13,001 | $ 12,834
Contractual gold payments – gold ounces paid | 2,375 | 2,375 | 7,125 | 7,125
Gain/(loss) on revaluation of deferred consideration – gold payments | $ 77,895 | $ 1,737 | $ 63,188 | $ 5,066

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- Definition Contractual gold payments. + References No definition available. + Details
Name: | wetf_ContractualGoldPayments
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents Contractual Gold Payments Gold Ounces Paid. + References No definition available. + Details
Name: | wetf_ContractualGoldPaymentsGoldOuncesPaid
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Gain/loss from revaluation of deferred consideration. + References No definition available. + Details
Name: | wetf_GainLossFromChangeInDeferredConsideration
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration