XML 133 R112.htm IDEA: XBRL DOCUMENT v3.20.4

Stock-Based Awards - Summary of Option Activity (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expire start date on options	Jan. 26, 2021
Expire end date on options	Nov. 15, 2021

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share Based Compensation Arrangement By Share Based Payment Award Expiration Period End Date

+ References

No definition available.

+ Details

Name:	wetf_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriodEndDate
Namespace Prefix:	wetf_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share Based Compensation Arrangement By Share Based Payment Award Expiration Period Start Date

+ References

No definition available.

+ Details

Name:	wetf_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriodStartDate
Namespace Prefix:	wetf_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration