XML 32 R66.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Business Combination - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 11, 2018 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
(Loss)/gain on revaluation of deferred consideration |  | $ (5,354,000) | $ (6,306,000) | $ (4,037,000) | $ 4,404,000 | $ (5,410,000) | $ 7,732,000 | $ 9,898,000 | $ 12,220,000 | $ (11,293,000) | [1] | $ 12,220,000 | [1] |
Acquisition and disposition-related costs |  |  |  |  |  |  |  |  |  | 902,000 |  | 11,454,000 |  | $ 4,832,000
Acquisition of ETFS Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss)/gain on revaluation of deferred consideration |  |  |  |  |  |  |  |  |  |  |  | $ (740,000) |  | $ (2,380,000)
Business acquisition, cash paid | $ 253,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, number of shares to be issued | 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, number of common shares that the preferred stock is convertible into | 14,750,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and disposition-related costs |  |  |  |  |  |  |  |  |  | $ 608,000 |  |  |  |
Acquisition of ETFS Business [Member] | Term Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing under term loan facility | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of ETFS Business [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility maximum borrowing capacity | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of ETFS Business [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, number of shares to be issued | 15,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Series A Non-Voting Convertible Preferred Stock [Member] | Acquisition of ETFS Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, number of shares to be issued | 14,750 |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | (Losses)/gains arise due to increases/(decreases) in the forward-looking price of gold and the magnitude of any gain or loss is highly correlated to the magnitude of the change in the forward-looking price of gold. See Note 5 for a reconciliation of changes in the deferred consideration balances

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding 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 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business Combination Acquisition And Disposal Related Costs. + References No definition available. + Details
Name: | wetf_BusinessCombinationAcquisitionAndDisposalRelatedCosts
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Common Stock Shares Issuable Upon Conversion Of Convertible Preferred Stock + References No definition available. + Details
Name: | wetf_CommonStockSharesIssuableUponConversionOfConvertiblePreferredStock
Namespace Prefix: | wetf_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gain/loss from revaluation of deferred consideration. + References No definition available. + Details
Name: | wetf_GainLossFromChangeInDeferredConsideration
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=wetf_AcquisitionOfEtfsBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=wetf_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=wetf_NonVotingConvertiblePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |