Relationship with NBCU and GE Equity (Details) (USD $)
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0 Months Ended |
3 Months Ended |
12 Months Ended |
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Nov. 17, 2014
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May 16, 2013
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May 12, 2012
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Feb. 25, 2009
board_members
demand_registration
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Apr. 30, 2011
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Jan. 31, 2015
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Feb. 01, 2014
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Feb. 02, 2013
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Mar. 20, 2015
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Jan. 02, 2011
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Related Party Transaction [Line Items] |
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Payments of Ordinary Dividends, Preferred Stock and Preference Stock |
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$ 6,400,000us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
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Current Fiscal Year End Date |
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--01-31
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Class of Warrant or Right, Outstanding |
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6,000,000us-gaap_ClassOfWarrantOrRightOutstanding
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Related Party, Ownership Interest in Company |
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7.00%evlv_RelatedPartyOwnershipInterestInCompany
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Debt Conversion, Converted Instrument, Warrants or Options Issued |
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5,058,741us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1
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Payments to Acquire Intangible Assets |
39,000us-gaap_PaymentsToAcquireIntangibleAssets
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2,830,000us-gaap_PaymentsToAcquireIntangibleAssets
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4,000,000us-gaap_PaymentsToAcquireIntangibleAssets
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0us-gaap_PaymentsToAcquireIntangibleAssets
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2,830,000us-gaap_PaymentsToAcquireIntangibleAssets
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4,000,000us-gaap_PaymentsToAcquireIntangibleAssets
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Finite-Lived Intangible Assets, Accumulated Amortization |
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18,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
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6,830,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
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Number of Board Members Appointed by Affiliates who Hold Upper Limit Beneficial Ownership |
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3evlv_NumberOfBoardMembersAppointedByAffiliatesWhoHoldUpperLimitBeneficialOwnership
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Joint Venture, Minimum Beneficial Ownership Percentage of Partners, Upper Limit |
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50.00%evlv_JointVentureMinimumBeneficialOwnershipPercentageOfPartnersUpperLimit
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Joint Venture, Shares, Beneficial Ownership |
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8,710,000evlv_JointVentureSharesBeneficialOwnership
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Number of Board Members Appointed by Affiliates who Hold Lower Limit Beneficial Ownership |
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2evlv_NumberOfBoardMembersAppointedByAffiliatesWhoHoldLowerLimitBeneficialOwnership
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Joint Venture, Minimum Beneficial Ownership Percentage of Partners, Lower Limit |
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10.00%evlv_JointVentureMinimumBeneficialOwnershipPercentageOfPartnersLowerLimit
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Joint Venture, Prohibited Asset Purchases by Affiliates, Threshold Percentage |
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10.00%evlv_JointVentureProhibitedAssetPurchasesByAffiliatesThresholdPercentage
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Joint Venture, Amended Agreement, Maximum Affiliate Beneficial Ownership Percentage |
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39.90%evlv_JointVentureAmendedAgreementMaximumAffiliateBeneficialOwnershipPercentage
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Joint Venture, Affiliate Ownership Threshold to Sell Outstanding Shares |
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5.00%evlv_JointVentureAffiliateOwnershipPercentageThresholdToSellOutstandingSharesLowerThreshold
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Joint Venture, Affiliate Percentage Ownership Threshold to Sell Outstanding Shares, Upper Threshold |
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90.00%evlv_JointVentureAffiliatePercentageOwnershipThresholdToSellOutstandingSharesUpperThreshold
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Joint Venture, Maximum Aggregate Transfer of Beneficial Ownership to Individual, Percentage |
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10.00%evlv_JointVentureMaximumAggregateTransferOfBeneficialOwnershipToIndividualPercentage
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Joint Venture, Standstill Period, Commencement Anniversary |
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10 years
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Joint Venture, Standstill Period, Period After Affiliate can No Longer Designate Nominees |
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6 months
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Joint Venture, Standstill Period, Expiration of Standstill Period |
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2 years
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Joint Venture, Standstill Period, Expiration, Tender Offer, Percentage |
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100.00%evlv_JointVentureStandstillPeriodExpirationTenderOfferPercentage
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Registration Rights Agreement, Number of Aggregate Demand Registrations |
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4evlv_RegistrationRightsAgreementNumberOfAggregateDemandRegistrations
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GE [Member] |
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Related Party Transaction [Line Items] |
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Series B Mandatory Redeemable Preferred Stock, Shares, Issued |
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4,929,266us-gaap_PreferredStockSharesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
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6,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Class of Warrant or Right, Exercise Price of Warrants or Rights |
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0.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Payments to Acquire Interest in Joint Venture |
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3,400,000us-gaap_PaymentsToAcquireInterestInJointVenture / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Equity Method Investment, Ownership Percentage in NBCU |
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49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Class of Warrant or Right, Outstanding |
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0us-gaap_ClassOfWarrantOrRightOutstanding / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Common Stock Shares Held in Subsidiary |
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3,718,767evlv_CommonStockSharesHeldInSubsidiary / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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Number of Members Related Party Entitled to Appoint to Board of Directors |
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2evlv_NumberOfMembersRelatedPartyEntitledToAppointToBoardOfDirectors / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_GeMember
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NBCU [Member] |
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Related Party Transaction [Line Items] |
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Common Stock Shares Held in Subsidiary |
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7,141,849evlv_CommonStockSharesHeldInSubsidiary / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_NbcuMember
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Minimum Beneficial Ownership to Retain Board Seat |
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5.00%evlv_MinimumBeneficialOwnershipToRetainBoardSeat / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_NbcuMember
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Joint Venture, Maximum Aggregate Transfer of Beneficial Ownership to Individual, Percentage |
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20.00%evlv_JointVentureMaximumAggregateTransferOfBeneficialOwnershipToIndividualPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_NbcuMember
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Registration Rights Agreement, Number of Aggregate Demand Registrations |
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1evlv_RegistrationRightsAgreementNumberOfAggregateDemandRegistrations / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_NbcuMember
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Comcast [Member] |
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Related Party Transaction [Line Items] |
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Equity Method Investment, Ownership Percentage in NBCU |
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51.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = evlv_ComcastMember
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