XML 69 R52.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Significant Accounting Policies - Summary of Reclassifications to Conform to the Current Year's Consolidated Financial Statement Presentation (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Operating Revenues: |  |  |  |
Advisory fees |  | $ 55,856 |  | $ 108,884
Settlement gain |  | 6,909 |  | 6,909
Other income |  | 386 |  | 725
Total revenues (currently reported) | $ 74,775 | 56,242 | $ 133,679 | 109,609
Other Income/(Expenses): |  |  |  |
Other gains and losses, net | $ (501) | (364) | $ (762) | 284
Previously Reported [Member] |  |  |  |
Operating Revenues: |  |  |  |
Advisory fees |  | 56,114 |  | 109,376
Settlement gain |  | 6,909 |  | 6,909
Other income |  | 405 |  | 1,742
Restatement Adjustment [Member] | Advisory Fees Reclassified to Other Income [Member] |  |  |  |
Operating Revenues: |  |  |  |
Advisory fees |  | (258) |  | (492)
Restatement Adjustment [Member] | Settlements Gain Reclassified to Other Income Expenses [Member] |  |  |  |
Operating Revenues: |  |  |  |
Settlement gain |  | (6,909) |  | (6,909)
Restatement Adjustment [Member] | Other Exchange Trade Product Fees Reclassified From Advisory Fees [Member] |  |  |  |
Operating Revenues: |  |  |  |
Other income |  | 258 |  | 492
Restatement Adjustment [Member] | Interest Income Reclassified to Other Income Expenses [Member] |  |  |  |
Operating Revenues: |  |  |  |
Other income |  | (641) |  | (1,225)
Restatement Adjustment [Member] | Realized and Unrealized Losses Reclassified to Other Gains and Losses Net [Member] |  |  |  |
Operating Revenues: |  |  |  |
Other income |  | 364 |  | 519
Restatement Adjustment [Member] | Miscellaneous Other Income Reclassified To Other Gains And Losses, Net [Member] |  |  |  |
Operating Revenues: |  |  |  |
Other income |  |  |  | (803)
Restatement Adjustment [Member] | Interest Income Reclassified From Operating Revenues [Member] |  |  |  |
Other Income/(Expenses): |  |  |  |
Other gains and losses, net |  | 641 |  | 1,225
Restatement Adjustment [Member] | Settlement Gain Reclassified from Operating Revenues [Member] |  |  |  |
Other Income/(Expenses): |  |  |  |
Other gains and losses, net |  | 6,909 |  | 6,909
Restatement Adjustment [Member] | Realized and Unrealized Losses Reclassified From Operating Revenues [Member] |  |  |  |
Other Income/(Expenses): |  |  |  |
Other gains and losses, net |  | $ (364) |  | (519)
Restatement Adjustment [Member] | Miscellaneous Other Income Reclassified From Operating Revenues [Member] |  |  |  |
Other Income/(Expenses): |  |  |  |
Other gains and losses, net |  |  |  | $ 803

X
- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_GainLossRelatedToLitigationSettlement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7,9) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_OtherNonoperatingGainsLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenuesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Income Loss + References No definition available. + Details
Name: | wetf_OtherIncomeLoss
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=srt_RestatementAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_AdvisoryFeesReclassifiedToOtherIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_SettlementsGainReclassifiedToOtherIncomeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_OtherExchangeTradeProductFeesReclassifiedFromAdvisoryFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_InterestIncomeReclassifiedToOtherIncomeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_RealizedAndUnrealizedLossesReclassifiedToOtherGainsAndLossesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_MiscellaneousOtherIncomeReclassifiedToOtherGainsAndLossesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_InterestIncomeReclassifiedFromOperatingRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_SettlementGainReclassifiedFromOperatingRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_RealizedAndUnrealizedLossesReclassifiedFromOperatingRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wetf_MiscellaneousOtherIncomeReclassifiedFromOperatingRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |