XML 29 R57.htm IDEA: XBRL DOCUMENT v2.4.1.9

Public Offerings - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended
	Nov. 30, 2012	Feb. 29, 2012	Dec. 31, 2012
Equity [Abstract]
Public offering of common stock per share amount	$ 6.10us-gaap_SharePrice	$ 5.61us-gaap_SharePrice
Shares sold by company		1,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
Number of shares sold by stockholders	27,795,630wetf_NumberOfSharesSoldByStockholders	15,516,587wetf_NumberOfSharesSoldByStockholders
Proceeds after commissions and other direct selling expenses		$ 4,329,000us-gaap_ProceedsFromIssuanceOfCommonStock	$ 4,329,000us-gaap_ProceedsFromIssuanceOfCommonStock
Sale of Stock, Consideration Received on Transaction	0us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Proceeds from Existing Shareholders on Sale	0wetf_ProceedsFromExistingShareholdersOnSale
Expenses related to offering			$ 353,000wetf_ExchangeListing

X

- Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Exchange listing.

+ References

No definition available.

+ Details

Name:	wetf_ExchangeListing
Namespace Prefix:	wetf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of shares sold by stockholders.

+ References

No definition available.

+ Details

Name:	wetf_NumberOfSharesSoldByStockholders
Namespace Prefix:	wetf_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Proceeds from existing shareholders on sale.

+ References

No definition available.

+ Details

Name:	wetf_ProceedsFromExistingShareholdersOnSale
Namespace Prefix:	wetf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration