XML 71 R52.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Income Taxes - Schedule of Annual Limitations for Net Operating Losses (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Summary Of Tax Credit Carry Forward And Operating Loss Carry Forwards [Line Items] |  |  |  |
Total | $ 26,070 | $ 109,839 | $ 140,959 | $ 136,515
Annual Prospective Limitation | 524 |  |  |
Annual Deemed Worthless | 3,487 |  |  |
1998 - 2004 [Member] |  |  |  |
Summary Of Tax Credit Carry Forward And Operating Loss Carry Forwards [Line Items] |  |  |  |
Total | 8,207 |  |  |
Annual Prospective Limitation | 524 |  |  |
Annual Deemed Worthless | 3,487 |  |  |
2005 - 2013 [Member] |  |  |  |
Summary Of Tax Credit Carry Forward And Operating Loss Carry Forwards [Line Items] |  |  |  |
Total | $ 17,863 |  |  |

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net Operating Loss Amount Deemed Worthless + References No definition available. + Details
Name: | wetf_NetOperatingLossAmountDeemedWorthless
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net Operating Loss Annual Limitation + References No definition available. + Details
Name: | wetf_NetOperatingLossAnnualLimitation
Namespace Prefix: | wetf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Summary Of Tax Credit Carry Forward And Operating Loss Carry Forwards [Line Items] + References No definition available. + Details
Name: | wetf_SummaryOfTaxCreditCarryForwardAndOperatingLossCarryForwardsLineItems
Namespace Prefix: | wetf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CreationDateAxis=wetf_NineteenNinetyEightToTwoThousandFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreationDateAxis=wetf_TwoThousandFiveToTwoThousandThirteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |