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Stockholders' Equity Restricted Stock Unit Activity (Details) (USD $) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2015 | Mar. 31, 2014
Stockholders Equity Restricted Stock Unit Activity Details |  |  |
Balance at beginning of period | 0 EGHT_RsuBalance | 1,134,856 EGHT_RsuBalance | 25,000 EGHT_RsuBalance
Granted | 25,000 EGHT_RsuGranted | 1,965,786 EGHT_RsuGranted | 1,291,200 EGHT_RsuGranted
Vested | 0 EGHT_RsuVested | (187,788)EGHT_RsuVested | (133,000)EGHT_RsuVested
Forfeited | 0 EGHT_RsuForfeited | (214,168)EGHT_RsuForfeited | (48,344)EGHT_RsuForfeited
Balance at end of period | 25,000 EGHT_RsuBalance | 2,698,686 EGHT_RsuBalance | 1,134,856 EGHT_RsuBalance
RSU weighted-average remaining contractual term, in years | 2.47 EGHT_RsuWeightedaverageRemainingContractualTermInYears | 1.88 EGHT_RsuWeightedaverageRemainingContractualTermInYears | 2.00 EGHT_RsuWeightedaverageRemainingContractualTermInYears
Beginniing of period, weighted-average purchase price | $ 0 EGHT_BeginniingOfPeriodWeightedaveragePurchasePrice | $ 9.00 EGHT_BeginniingOfPeriodWeightedaveragePurchasePrice | $ 6.91 EGHT_BeginniingOfPeriodWeightedaveragePurchasePrice
Granted, weighted-average purchase price | $ 6.91 EGHT_GrantedWeightedaveragePurchasePrice | $ 6.68 EGHT_GrantedWeightedaveragePurchasePrice | $ 9.11 EGHT_GrantedWeightedaveragePurchasePrice
Vested, weighted-average purchase price | $ 0 EGHT_VestedWeightedaveragePurchasePrice | $ 9.54 EGHT_VestedWeightedaveragePurchasePrice | $ 9.49 EGHT_VestedWeightedaveragePurchasePrice
Forfeited, weighted-average purchase price | $ 0 EGHT_ForfeitedWeightedaveragePurchasePrice | $ 8.30 EGHT_ForfeitedWeightedaveragePurchasePrice | $ 9.61 EGHT_ForfeitedWeightedaveragePurchasePrice
End of period, weighted-average purchase price | $ 6.91 EGHT_EndOfPeriodWeightedaveragePurchasePrice | $ 7.33 EGHT_EndOfPeriodWeightedaveragePurchasePrice | $ 9.00 EGHT_EndOfPeriodWeightedaveragePurchasePrice

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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | EGHT_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | EGHT_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
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Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | EGHT_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition No authoritative reference available. + References No definition available. + Details
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- Definition No authoritative reference available. + References No definition available. + Details
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Namespace Prefix: | EGHT_
Data Type: | xbrli:sharesItemType
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- Definition No authoritative reference available. + References No definition available. + Details
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Balance Type: | na
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- Definition No authoritative reference available. + References No definition available. + Details
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- Details
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Namespace Prefix: | EGHT_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
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Period Type: | duration