Represents the amount of maximum damages payable as a contingent consideration.

No definition available.

Name:	inwk_LossContingencyDamagesMaximumContingentConsideration
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of damages paid as a contingent consideration.

+ References

No definition available.

+ Details

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Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of damages paid as a contingent the amount of damages paid as a contingent consideration.

+ References

No definition available.

+ Details

Name:	inwk_LossContingencyDamagesValueFixedConsideration
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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Namespace Prefix:
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Commitments and Contingencies (Details) € in Millions, $ in Millions	1 Months Ended				9 Months Ended
	Jan. 31, 2014 EUR (€)	Dec. 31, 2013 USD ($)	Dec. 31, 2013 EUR (€)	Nov. 30, 2013 EUR (€)	Sep. 30, 2017 USD ($)	Sep. 30, 2017 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Feb. 28, 2014 EUR (€)
Wrongful Termination Lawsuit - Productions Graphics [Member]
Other Commitments [Line Items]
Loss contingency, damages sought		$ 1.0	€ 0.7	€ 0.7	$ 0.7
Loss contingency, damages value, contingent consideration							$ 9.4		€ 7.1
Loss contingency, damages value, fixed consideration							8.0	€ 5.8
Loss contingency, damages maximum, contingent consideration							$ 37.6	€ 34.5
Employment Arbitration Claim [Member]
Other Commitments [Line Items]
Loss contingency, damages sought	€ 0.6					€ 0.7