XML 92 R73.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Securities Owned - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Securities Owned [Member] |  |
Trading losses on securities owned | $ 2,762 | $ 59

X
- Definition Unrealized profit and loss on trading securities held at the reporting date. + References No definition available. + Details
Name: | wetf_UnrealizedProfitAndLossOnTradingSecuritiesHeldAtTheReportingDate
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=wetf_SecuritiesOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |