XML 122 R103.htm IDEA: XBRL DOCUMENT
v3.21.1

Contingent Payments - Additional Information (Detail) $ in Thousands, $ in Thousands |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 19, 2020 USD ($) | Feb. 19, 2020 CAD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2021 CAD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CAD ($) | May 04, 2020 USD ($)
Recognized gain loss on sale of business |  |  |  |  | $ 2,877 |  |  |  |
Impairment |  |  | $ 303 |  | 19,672 |  |  |  |
WisdomTree Asset Management Canada, Inc [Member] |  |  |  |  |  |  |  |  |
Other receivables |  |  |  |  |  | $ 2,000 |  | $ 2,000 |
Proceeds from divestiture of businesses | $ 2,774 | $ 3,720 |  |  |  |  |  |  |
Recognized gain loss on sale of business |  |  |  |  | 2,877 |  |  |  |
WisdomTree Asset Management Canada, Inc [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Additional consideration payable |  | 2,000 |  |  |  |  |  |  |
WisdomTree Asset Management Canada, Inc [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Additional consideration payable |  | $ 8,000 |  |  |  |  |  |  |
Advisor Engine [Member] |  |  |  |  |  |  |  |  |
Maximum Amount of Contingent Payments That May be Received |  |  |  |  |  |  |  |  | $ 10,408
Contingent payments |  |  | $ 0 |  |  |  | $ 0 |  |
Gain (Loss) on Disposition of Assets |  |  |  | $ 1,093 |  |  |  |  |
Advisor Engine [Member] | Fair Value Of Upfront Consideration Received [Member] |  |  |  |  |  |  |  |  |
Fair value of upfront consideration received |  |  |  |  |  |  |  |  | $ 9,592
Advisor Engine Financial Interest [Member] | Financial Interests [Member] |  |  |  |  |  |  |  |  |
Impairment |  |  |  |  | $ 19,672 |  |  |  |

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 + Details
Name: | us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount due from parties in nontrade transactions, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Contingent payments. + References No definition available. + Details
Name: | wetf_ContingentPayments
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of upfront consideration received. + References No definition available. + Details
Name: | wetf_FairValueOfUpfrontConsiderationReceived
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum amount of contingent payments that may be received. + References No definition available. + Details
Name: | wetf_MaximumAmountOfContingentPaymentsThatMayBeReceived
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=wetf_WisdomtreeAssetManagementCanadaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | wetf_DetailsAxis=wetf_FairValueOfUpfrontConsiderationReceivedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=wetf_FinancialInterestsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |