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Description of the Business (Narrative) (Details) $ in Millions	3 Months Ended
	Jun. 30, 2018 USD ($)
Description Of Business Narrative Details
Fiscal Year End Date	--03-31
Assets, net of accumulated amortization reclassified	$ 7.7

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- References

No definition available.

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

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Namespace Prefix:	EGHT_
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- Definition

End date of current fiscal year in the format --MM-DD.

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No definition available.

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Namespace Prefix:	dei_
Data Type:	xbrli:gMonthDayItemType
Balance Type:	na
Period Type:	duration