Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

v2.4.1.9
Commitments and Contingencies (Details) (USD $)
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Nov. 17, 2014
Unrecorded Unconditional Purchase Obligation [Line Items]        
Total grant date fair value       $ 1,000,000evlv_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityIntstrumentOtherThanOptionsAggregateValue
Severance Costs 5,520,000us-gaap_SeveranceCosts1 0us-gaap_SeveranceCosts1 0us-gaap_SeveranceCosts1  
Document Period End Date Jan. 31, 2015      
Compensation 625,000us-gaap_OfficersCompensation      
Capital lease liability 36,000us-gaap_CapitalLeaseObligationsNoncurrent 88,000us-gaap_CapitalLeaseObligationsNoncurrent    
Defined Benefit Plan [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_DefinedBenefitPlanMember
     
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 6.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_DefinedBenefitPlanMember
     
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 1,062,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_DefinedBenefitPlanMember
921,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_DefinedBenefitPlanMember
   
Cable and Satellite Affiliation Agreements [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Number of Cable Systems 1,854evlv_NumberofCableSystems
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
     
Affiliation Agreement Minimum Term 1 year      
Affiliation Agreement Maximum Term 5 years      
Cable Access Fees 98,581,000evlv_CableAccessFees
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
92,473,000evlv_CableAccessFees
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
110,984,000evlv_CableAccessFees
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
 
Purchase Obligation, Due in Next Twelve Months 81,626,000us-gaap_ContractualObligationDueInNextTwelveMonths
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
     
Purchase Obligation, Due in Second Year 53,106,000us-gaap_ContractualObligationDueInSecondYear
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
     
Purchase Obligation, Due in Third Year 41,288,000us-gaap_ContractualObligationDueInThirdYear
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
     
Purchase Obligation, Due in Fourth Year 0us-gaap_ContractualObligationDueInFourthYear
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
     
Contractural Obligation, Due after Fourth Year 0evlv_ContracturalObligationDueAfterFourthYear
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= evlv_CableAndSatelliteAffiliationAgreementsMember
     
Employment Contracts [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Contractual Obligation 3,501,000us-gaap_ContractualObligation
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_EmploymentContractsMember
     
Property Subject to Operating Lease [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
2014 (1,456,000)us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
     
2015 793,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
     
2016 113,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
     
2017 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
     
2018 and thereafter 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
     
Operating Leases, Rent Expense 2,140,000us-gaap_LeaseAndRentalExpense
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
2,015,000us-gaap_LeaseAndRentalExpense
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
1,715,000us-gaap_LeaseAndRentalExpense
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_PropertySubjectToOperatingLeaseMember
 
Capital Lease Obligations [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
2014 (55,000)us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
2015 36,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
2016 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
2017 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
2018 and thereafter 0us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
Capital Leased Assets, Gross 155,000us-gaap_CapitalLeasedAssetsGross
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
Capital Leases, Future Minimum Payments Due 91,000us-gaap_CapitalLeasesFutureMinimumPaymentsDue
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
Capital Leases, Future Minimum Payments, Interest Included in Payments (3,000)us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
Capital Lease Obligations 88,000us-gaap_CapitalLeaseObligations
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
Capital Leases, Future Minimum Payments Due, Next Twelve Months 52,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
Capital lease liability 36,000us-gaap_CapitalLeaseObligationsNoncurrent
/ us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis
= us-gaap_CapitalLeaseObligationsMember
     
One and one half times [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Severance Costs 1.5us-gaap_SeveranceCosts1
/ evlv_SeveranceMultiplierAxis
= evlv_OneandonehalftimesMember
     
Two times [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Severance Costs 2us-gaap_SeveranceCosts1
/ evlv_SeveranceMultiplierAxis
= evlv_TwotimesMember
     
One Times [Member]        
Unrecorded Unconditional Purchase Obligation [Line Items]        
Severance Costs $ 1us-gaap_SeveranceCosts1
/ evlv_SeveranceMultiplierAxis
= evlv_OneTimesMember