XML 111 R93.htm IDEA: XBRL DOCUMENT
v3.20.2

Revenues from Contracts with Customers - Summary of Revenues from Contracts with Customers (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] |  |  |  |
Total operating revenues | $ 64,640 | $ 67,718 | $ 186,640 | $ 199,496
Advisory Fees [Member] |  |  |  |
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] |  |  |  |
Total operating revenues | 63,919 | 67,006 | 184,077 | 197,473
Other Income [Member] |  |  |  |
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] |  |  |  |
Total operating revenues | $ 721 | $ 712 | $ 2,563 | $ 2,023

X
- Definition Revenues from operations, excluding interest and dividend income. Includes revenues from the following sources: investment banking (underwriting and financial advisory), principal transactions (sales and trading, and investment gains and losses), commissions, asset management, and investment advisory and other services. + References No definition available. + Details
Name: | us-gaap_RevenuesExcludingInterestAndDividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenues Categorized As Revenues From Contracts With Customers And Other Sources Of Revenues [Line Items] + References No definition available. + Details
Name: | wetf_RevenuesCategorizedAsRevenuesFromContractsWithCustomersAndOtherSourcesOfRevenuesLineItems
Namespace Prefix: | wetf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_InvestmentAdvisoryManagementAndAdministrativeServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=wetf_OtherServicesIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |