XML 87 R66.htm IDEA: XBRL DOCUMENT v3.20.4

Acquisitions and Exit Activities - Schedule of Operating Losses (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating losses		$ 428	$ 3,336	$ 8,445
WTAMC [Member]
Operating losses		$ 428	2,786	3,925
WisdomTree Japan Inc. ("WTJ") [Member]
Operating losses	[1]		$ 550	$ 4,520
[1] WTJ also recognized an impairment expense of $572 in connection with the termination of its office lease during the year ended December 31, 2019.

X

- Definition

Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=wetf_WisdomtreeAssetManagementCanadaIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=wetf_WisdomtreeJapanIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: