Activist Shareholder Costs (Details) (USD $)	3 Months Ended	12 Months Ended
May 02, 2015	May 03, 2014	Jan. 31, 2015
Activist Shareholder Costs [Abstract]
Other Nonrecurring Expense			$ 750,000us-gaap_OtherNonrecurringExpense
Activist Shareholder Costs	$ 0evlv_ActivistShareholderCosts	$ 1,045,000evlv_ActivistShareholderCosts	$ 3,518,000evlv_ActivistShareholderCosts

Amount of other expense that is infrequent in occurrence or unusual in nature.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6365513&loc=d3e15122-107781

Name:	us-gaap_OtherNonrecurringExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration