XML 60 R50.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Cash, Cash Equivalents and Investments with Hierarchy (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
--- | --- | --- | --- | ---
Amortized Costs | $ 163,005 | $ 177,198 |  |
Gross Unrealized Gains | 89 | 71 |  |
Gross Unrealized Loss | (244) | (175) |  |
Estimated Fair Value | 162,850 | 177,094 |  |
Cash and cash equivalents | 33,576 | 53,110 | $ 59,159 | $ 50,305
Short-term marketable investments | 129,274 | 123,984 |  |
Liabilities, Fair Value Disclosure | 341 | 0 | $ 0 |
Aavailable-for-sale investments due within one year | 71,071 |  |  |
Aavailable-for-sale investments due after one year | 58,203 |  |  |
Level 1 |  |  |  |
Amortized Costs | 35,576 | 55,110 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Loss | (187) | (107) |  |
Estimated Fair Value | 35,389 | 55,003 |  |
Cash and cash equivalents | 33,576 | 53,110 |  |
Short-term marketable investments | 1,813 | 1,893 |  |
Level 2 |  |  |  |
Amortized Costs | 127,429 | 122,088 |  |
Gross Unrealized Gains | 89 | 71 |  |
Gross Unrealized Loss | (57) | (68) |  |
Estimated Fair Value | 127,461 | 122,091 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 127,461 | 122,091 |  |
Level 3 |  |  |  |
Amortized Costs | 0 |  |  |
Gross Unrealized Gains | 0 |  |  |
Gross Unrealized Loss | 0 |  |  |
Estimated Fair Value | 341 |  |  |
Cash and cash equivalents | 0 |  |  |
Short-term marketable investments | 0 |  |  |
Liabilities, Fair Value Disclosure | 341 |  |  |
Cash |  |  |  |
Amortized Costs | 18,596 | 24,734 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Loss | 0 | 0 |  |
Estimated Fair Value | 18,596 | 24,734 |  |
Cash and cash equivalents | 18,596 | 24,734 |  |
Short-term marketable investments | 0 | 0 |  |
Money Market Funds | Level 1 |  |  |  |
Amortized Costs | 14,980 | 28,376 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Loss | 0 | 0 |  |
Estimated Fair Value | 14,980 | 28,376 |  |
Cash and cash equivalents | 14,980 | 28,376 |  |
Short-term marketable investments | 0 | 0 |  |
Mutual Funds | Level 1 |  |  |  |
Amortized Costs | 2,000 | 2,000 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Loss | (187) | (107) |  |
Estimated Fair Value | 1,813 | 1,893 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 1,813 | 1,893 |  |
Commercial Paper | Level 2 |  |  |  |
Amortized Costs | 6,794 | 9,043 |  |
Gross Unrealized Gains | 2 | 1 |  |
Gross Unrealized Loss | 0 | 0 |  |
Estimated Fair Value | 6,796 | 9,044 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 6,796 | 9,044 |  |
Corporate Debt | Level 2 |  |  |  |
Amortized Costs | 85,164 | 75,284 |  |
Gross Unrealized Gains | 78 | 57 |  |
Gross Unrealized Loss | (28) | (10) |  |
Estimated Fair Value | 85,214 | 75,331 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 85,214 | 75,331 |  |
Municipal Securities | Level 2 |  |  |  |
Amortized Costs | 1,007 | 5,435 |  |
Gross Unrealized Gains | 0 | 2 |  |
Gross Unrealized Loss | (1) | (1) |  |
Estimated Fair Value | 1,006 | 5,436 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 1,006 | 5,436 |  |
Asset-backed Securities | Level 2 |  |  |  |
Amortized Costs | 24,614 | 21,503 |  |
Gross Unrealized Gains | 7 | 4 |  |
Gross Unrealized Loss | (11) | (5) |  |
Estimated Fair Value | 24,610 | 21,502 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 24,610 | 21,502 |  |
Mortgage backed Securities | Level 2 |  |  |  |
Amortized Costs | 2,045 | 5,822 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Loss | (17) | (52) |  |
Estimated Fair Value | 2,028 | 5,770 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 2,028 | 5,770 |  |
Agency Bond | Level 2 |  |  |  |
Amortized Costs | 6,805 | 4,201 |  |
Gross Unrealized Gains | 1 | 3 |  |
Gross Unrealized Loss | 0 | 0 |  |
Estimated Fair Value | 6,806 | 4,204 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 6,806 | 4,204 |  |
International Government Securities | Level 2 |  |  |  |
Amortized Costs | 1,000 | 800 |  |
Gross Unrealized Gains | 1 | 4 |  |
Gross Unrealized Loss | 0 | 0 |  |
Estimated Fair Value | 1,001 | 804 |  |
Cash and cash equivalents | 0 | 0 |  |
Short-term marketable investments | 1,001 | $ 804 |  |
Contingent Consideration | Level 3 |  |  |  |
Amortized Costs | 0 |  |  |
Gross Unrealized Gains | 0 |  |  |
Gross Unrealized Loss | 0 |  |  |
Estimated Fair Value | 341 |  |  |
Cash and cash equivalents | 0 |  |  |
Short-term marketable investments | 0 |  |  |
Liabilities, Fair Value Disclosure | $ 341 |  |  |

X
- References No definition available. + Details
Name: | EGHT_AavailableforsaleInvestmentsDueAfterOneYear
Namespace Prefix: | EGHT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | EGHT_AavailableforsaleInvestmentsDueWithinOneYear
Namespace Prefix: | EGHT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26626-111562 + Details
Name: | us-gaap_AvailableForSaleSecuritiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=EGHT_ContingentConsiderationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |