XML 99 R80.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Investment - Summary of table below presents the inputs used in backsolve valuation approach as follows (Detail) - Fair Value, Inputs, Level 3 [Member] - yr | Jun. 09, 2021 | Mar. 08, 2021
--- | --- | ---
Investments Fair Value Disclosure [Line Items] |  |
Expected volatility | 50.00% | 55.00%
Time to exit (in years) | 4.75 | 5

X
- Definition Fair Value Assumption, Expected Term. + References No definition available. + Details
Name: | wetf_Fairvalueassumptionexpectedterm
Namespace Prefix: | wetf_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair Value Assumption, Expected Volatility Rate. + References No definition available. + Details
Name: | wetf_Fairvalueassumptionexpectedvolatilityrate
Namespace Prefix: | wetf_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Investments Fair Value Disclosure . + References No definition available. + Details
Name: | wetf_InvestmentsFairValueDisclosureLineItems
Namespace Prefix: | wetf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |