XML 121 R46.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Investments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Investment [Line Items] |
Investments | The following table sets forth the Company’s investments:
|  | December 31, 2019 |  |  | December 31, 2018 |
AdvisorEngine—Preferred stock |  | $ | — |  |  | $ | 25,000 |
Securrency, Inc.—Preferred stock |  |  | 8,112 |  |  |  | — |
Thesys—Preferred stock |  |  | 3,080 |  |  |  | 3,080 |
Total |  | $ | 11,192 |  |  | $ | 28,080 |
Thesys Group, Inc [Member] |
Investment [Line Items] |
Summary of Ranges and Weighted Averages of Significant Unobservable Inputs Used to Determine Enterprise Value | The table below presents the ranges and weighted averages of significant unobservable inputs used in this assessment at December 31, 2018:
|  | Range (Weighted Average) |
Income Approach (1) |  |  |  |
WACC |  |  | 3.8% – 15.5% (14.1%) |
(1) | The inputs selected varied, based upon the Thesys business line being valued. An increase in the WACC would result in a lower enterprise value.

X
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition A tabular disclosure of (a) the aggregate carrying amount of all cost-method investments; (b) the aggregate carrying amount of cost-method investments that the investor did not evaluate for impairment for cost-method investments. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCostMethodInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | wetf_InvestmentsLineItems
Namespace Prefix: | wetf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=wetf_ThesysGroupIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |