Annual report pursuant to Section 13 and 15(d)

Credit Agreements (Details)

v2.4.1.9
Credit Agreements (Details) (USD $)
12 Months Ended 3 Months Ended 0 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Apr. 28, 2012
Feb. 01, 2014
Jan. 31, 2014
Feb. 09, 2012
Mar. 06, 2015
Line of Credit Facility [Line Items]                
Gains (Losses) on Extinguishment of Debt $ 0us-gaap_GainsLossesOnExtinguishmentOfDebt $ 0us-gaap_GainsLossesOnExtinguishmentOfDebt $ (500,000)us-gaap_GainsLossesOnExtinguishmentOfDebt          
2015 1,736,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths              
2016 1,736,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo              
2017 1,736,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree              
2018 47,499,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour              
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive              
Long term, Total Credit Facility 52,707,000evlv_LongtermTotalCreditFacility              
Line of Credit, Current (1,736,000)us-gaap_LinesOfCreditCurrent 0us-gaap_LinesOfCreditCurrent     0us-gaap_LinesOfCreditCurrent      
Long-term Debt [Member]                
Line of Credit Facility [Line Items]                
2015 1,736,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LongTermDebtMember
             
2016 1,736,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LongTermDebtMember
             
2017 1,736,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LongTermDebtMember
             
2018 6,799,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LongTermDebtMember
             
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LongTermDebtMember
             
Long term, Total Credit Facility 12,007,000evlv_LongtermTotalCreditFacility
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LongTermDebtMember
             
Line of Credit [Member]                
Line of Credit Facility [Line Items]                
2015 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
             
2016 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
             
2017 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
             
2018 40,700,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
             
2019 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
             
Long term, Total Credit Facility 40,700,000evlv_LongtermTotalCreditFacility
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
             
2010 Credit Agreement - Crystal Financial, LLC [Member]                
Line of Credit Facility [Line Items]                
Gains (Losses) on Extinguishment of Debt       500,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_LongtermDebtTypeAxis
= evlv_A2010CreditAgreementCrystalFinancialLlcMember
       
2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Line of Credit Facility, Capacity Available for Trade Purchases           6,000,000us-gaap_LineOfCreditFacilityCapacityAvailableForTradePurchases
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
   
Line of Credit Facility, Remaining Borrowing Capacity 19,300,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
             
Earmarked for Distribution Facility Expansion 7,300,000evlv_EarmarkedforDistributionFacilityExpansion
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
             
Interest Expense, Debt 1,554,000us-gaap_InterestExpenseDebt
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
1,435,000us-gaap_InterestExpenseDebt
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
1,503,000us-gaap_InterestExpenseDebt
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
         
Debt Instrument, Covenant Compliance, Minimum Unrestricted Cash Requirement           10,000,000evlv_DebtInstrumentCovenantComplianceMinimumUnrestrictedCashRequirement
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
   
Debt Instrument, Covenant Compliance, Minimum Unrestricted Cash Threshold for Additional Covenants           16,000,000evlv_DebtInstrumentCovenantComplianceMinimumUnrestrictedCashThresholdForAdditionalCovenants
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
   
Deferred Finance Costs, Noncurrent, Net           718,000us-gaap_DeferredFinanceCostsNoncurrentNet
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
466,000us-gaap_DeferredFinanceCostsNoncurrentNet
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
 
Debt Instrument Maturity Term         5 years      
2014 Line Of Credit Amendment - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Line of Credit Facility, Maximum Borrowing Capacity           15,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
   
Long term, Total Credit Facility 52,707,000evlv_LongtermTotalCreditFacility
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
38,000,000evlv_LongtermTotalCreditFacility
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
    38,000,000evlv_LongtermTotalCreditFacility
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
Long-term Line of Credit 40,700,000us-gaap_LineOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
38,000,000us-gaap_LineOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
    38,000,000us-gaap_LineOfCredit
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
Long-term Debt 12,007,000us-gaap_LongTermDebt
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
0us-gaap_LongTermDebt
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
    0us-gaap_LongTermDebt
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
Line of Credit, Current (1,736,000)us-gaap_LinesOfCreditCurrent
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
0us-gaap_LinesOfCreditCurrent
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
    0us-gaap_LinesOfCreditCurrent
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
Debt Instrument, Term         84 months      
Mandatory Prepayment Percentage         50.00%evlv_MandatoryPrepaymentPercentage
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
Mandatory Prepayment Maximum Amount         2,000,000evlv_MandatoryPrepaymentMaximumAmount
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
Long-term credit facility, excluding current portion 50,971,000us-gaap_LongTermDebtNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
38,000,000us-gaap_LongTermDebtNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
    38,000,000us-gaap_LongTermDebtNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
     
LIBOR [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Instrument, Basis Spread on Variable Rate         3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
/ evlv_VariableInterestRateAxis
= evlv_LiborMember
     
LIBOR [Member] | 2014 Line Of Credit Amendment - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Instrument, Basis Spread on Variable Rate         6.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
/ evlv_VariableInterestRateAxis
= evlv_LiborMember
     
LIBOR Rate Period One         1 month      
LIBOR Rate Period Two         2 months      
LIBOR Rate Period Three         3 months      
LIBOR Rate Period Four         6 months      
Debt Instrument Minimum Basis Spread         5.00%evlv_DebtInstrumentMinimumBasisSpread
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
/ evlv_VariableInterestRateAxis
= evlv_LiborMember
     
Debt Instrument Maximum Basis Spread         6.00%evlv_DebtInstrumentMaximumBasisSpread
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
/ evlv_VariableInterestRateAxis
= evlv_LiborMember
     
Base Rate Option [Member] | 2014 Line Of Credit Amendment - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Instrument, Basis Spread on Variable Rate         5.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
/ evlv_VariableInterestRateAxis
= evlv_BaseRateOptionMember
     
Debt Instrument Minimum Basis Spread         4.00%evlv_DebtInstrumentMinimumBasisSpread
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
/ evlv_VariableInterestRateAxis
= evlv_BaseRateOptionMember
     
Debt Instrument Maximum Basis Spread         5.00%evlv_DebtInstrumentMaximumBasisSpread
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2014LineOfCreditAmendmentPNCBankN.A.Member
/ evlv_VariableInterestRateAxis
= evlv_BaseRateOptionMember
     
Year One [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Early Termination Fee 2.00%evlv_DebtEarlyTerminationFee
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
/ evlv_TerminationYearAxis
= evlv_YearOneMember
             
Year Two [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Early Termination Fee         1.00%evlv_DebtEarlyTerminationFee
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
/ evlv_TerminationYearAxis
= evlv_YearTwoMember
     
Year Three [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Early Termination Fee 0.00%evlv_DebtEarlyTerminationFee
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
/ evlv_TerminationYearAxis
= evlv_YearThreeMember
      0.50%evlv_DebtEarlyTerminationFee
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
/ evlv_TerminationYearAxis
= evlv_YearThreeMember
     
Year Ywo [Member] | 2012 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Debt Early Termination Fee 0.50%evlv_DebtEarlyTerminationFee
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2012LineOfCreditAgreementPncBankNAMember
/ evlv_TerminationYearAxis
= evlv_YearYwoMember
             
Subsequent Event [Member] | 2015 Line Of Credit Agreement - PNC Bank, N.A. [Member]                
Line of Credit Facility [Line Items]                
Line of Credit Facility, Maximum Borrowing Capacity               75,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2015LineOfCreditAgreementPNCBankN.A.Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Line of Credit, Accordion Feature               $ 15,000,000evlv_LineofCreditAccordionFeature
/ us-gaap_LineOfCreditFacilityAxis
= evlv_A2015LineOfCreditAgreementPNCBankN.A.Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember