Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity Stock Option Activity (Details)

v2.4.1.9
Shareholders' Equity Stock Option Activity (Details) (USD $)
3 Months Ended 12 Months Ended
Feb. 01, 2014
Jan. 31, 2015
Feb. 02, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Granted, weighted average grant date fair value $ 3.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 3.92us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 1.03us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
2011 Omnibus Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Balance outstanding at beginning of period   3,083,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Granted   232,000evlv_ShareBasedCompensationArrangementOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Exercised   (222,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Forfeited or canceled   (630,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Balance outstanding at end of period   2,463,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Options exercisable 1,229,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
1,322,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
50,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Balance outstanding at beginning of period, weighted average exercise price   $ 4.03us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Granted, weighted average grant date fair value   $ 4.65us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Exercised, weighted average exercise price   $ 2.89us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Forfeited or canceled, weighted average grant date fair value   $ 4.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Balance outstanding at end of period, weighted average exercise price   $ 4.09us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
 
Options exercisable, weighted average exercise price $ 3.78us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
$ 4.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
$ 2.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2011OmnibusIncentivePlanMember
2004 Omnibus Incentive Stock Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Balance outstanding at beginning of period   2,104,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Granted   107,000evlv_ShareBasedCompensationArrangementOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Exercised   (665,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Forfeited or canceled   (340,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Balance outstanding at end of period   1,206,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Options exercisable 2,037,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
1,179,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
1,965,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Balance outstanding at beginning of period, weighted average exercise price   $ 6.25us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Granted, weighted average grant date fair value   $ 5.66us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Exercised, weighted average exercise price   $ 2.50us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Forfeited or canceled, weighted average grant date fair value   $ 11.76us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Balance outstanding at end of period, weighted average exercise price   $ 6.71us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
 
Options exercisable, weighted average exercise price $ 6.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
$ 6.76us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
$ 6.14us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2004OmnibusIncentiveStockPlanMember
2001 Omnibus Stock Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Balance outstanding at beginning of period   1,121,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Granted   0evlv_ShareBasedCompensationArrangementOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Exercised   (260,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Forfeited or canceled   (35,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Balance outstanding at end of period   826,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Options exercisable 1,121,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
826,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
1,151,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Balance outstanding at beginning of period, weighted average exercise price   $ 6.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Granted, weighted average grant date fair value   $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Exercised, weighted average exercise price   $ 2.34us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Forfeited or canceled, weighted average grant date fair value   $ 13.67us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Balance outstanding at end of period, weighted average exercise price   $ 6.89us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
 
Options exercisable, weighted average exercise price $ 6.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
$ 6.89us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
$ 5.69us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= evlv_A2001OmnibusStockPlanMember
Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Balance outstanding at beginning of period   500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Granted   0evlv_ShareBasedCompensationArrangementOptionsGrantsInPeriodGross
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Exercised   (50,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Forfeited or canceled   0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Balance outstanding at end of period   450,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Options exercisable 397,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
380,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
363,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Balance outstanding at beginning of period, weighted average exercise price   $ 4.24us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Granted, weighted average grant date fair value   $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Exercised, weighted average exercise price   $ 1.82us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Forfeited or canceled, weighted average grant date fair value   $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Balance outstanding at end of period, weighted average exercise price   $ 4.51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
 
Options exercisable, weighted average exercise price $ 4.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
$ 4.60us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember
$ 3.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= us-gaap_StockOptionMember