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Deferred Consideration - Schedule of Deferred Consideration (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Contractual gold payments	$ 4,446	$ 4,314	$ 8,896	$ 8,584
Contractual gold payments – gold ounces paid	2,375	2,375	4,750	4,750
Gain/(loss) on revaluation of deferred consideration – gold payments	$ 2,311	$ 497	$ (14,707)	$ 3,329

X

- 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

X

- 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

X

- 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