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Commitments and Contingencies (Service Provider Contracts) (Details) $ in Thousands | Mar. 31, 2018 USD ($)
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Year ending March 31: |
2019 | $ 1,916
2020 | 8
Total minimum payments | $ 1,924

X
- Definition The total amount of service provider expense expected to be recognized during the succeeding fiscal years. + References No definition available. + Details
Name: | EGHT_ServiceProvidersFutureMinimumPaymentsDue
Namespace Prefix: | EGHT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | EGHT_ServiceProvidersFutureMinimumPaymentsDueAbstract
Namespace Prefix: | EGHT_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of service provider expense expected to be recognized during year one of the five succeeding fiscal years. + References No definition available. + Details
Name: | EGHT_ServiceProvidersFutureMinimumPaymentsDueCurrent
Namespace Prefix: | EGHT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of service provider expense expected to be recognized during year two of the five succeeding fiscal years. + References No definition available. + Details
Name: | EGHT_ServiceProvidersFutureMinimumPaymentsDueInTwoYears
Namespace Prefix: | EGHT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant