XML 100 R84.htm IDEA: XBRL DOCUMENT
v3.21.2

Leases - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 09, 2021 | Sep. 30, 2021 | Sep. 30, 2021
Operating lease, impairment loss |  | $ 9,277 |
Payment of lease termination fee | $ 12,725 |  | $ 12,725

X
- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123386189&loc=SL77918607-209975 + Details
Name: | us-gaap_GainLossOnTerminationOfLease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payment of Lease Termination Fee. + References No definition available. + Details
Name: | wetf_PaymentOfLeaseTerminationFee
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration