XML 25 R7.htm IDEA: XBRL DOCUMENT v3.7.0.1

Consolidated Statements of Cash Flows (Parenthetical) $ in Thousands	Jun. 20, 2017 USD ($)
Convertible Preferred Stock [Member] | Tradeworx Inc [Member] | Series Y Preferred Stock [Member]
Fair value of preferred stock	$ 6,909

X

- Definition

Fair value portion of investments accounted under the cost method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=75030709&loc=d3e39828-111592

+ Details

Name:	us-gaap_CostMethodInvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_ConvertiblePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=wetf_TradeworxIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=wetf_SeriesYPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: