Commitments and Contingencies (Service Provider Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Commitments And Contingencies Service Provider Contracts Details
Remaining 2015	$ 747
2016	3,014
2017	2,452
2018	891
Total minimum payments	$ 7,104

Name:	EGHT_CommitmentsAndContingenciesServiceProviderContractsDetailsAbstract
Namespace Prefix:	EGHT_
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The total amount of service provider expense expected to be recognized during the succeeding fiscal years.

No definition available.

Name:	EGHT_ServiceProvidersFutureMinimumPaymentsDue
Namespace Prefix:	EGHT_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The amount of service provider expense expected to be recognized during year one of the five succeeding fiscal years.

No definition available.

Name:	EGHT_ServiceProvidersFutureMinimumPaymentsDueCurrent
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of service provider expense expected to be recognized during year four of the five succeeding fiscal years.

No definition available.

Name:	EGHT_ServiceProvidersFutureMinimumPaymentsDueInFourYears
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of service provider expense expected to be recognized during year three of the five succeeding fiscal years.

No definition available.

Name:	EGHT_ServiceProvidersFutureMinimumPaymentsDueInThreeYears
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of service provider expense expected to be recognized during year two of the five succeeding fiscal years.

No definition available.

Name:	EGHT_ServiceProvidersFutureMinimumPaymentsDueInTwoYears
Namespace Prefix:	EGHT_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant