Fair Value Measurements (Details) (USD $)	May 02, 2015	Jan. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]
Line of Credit, Current	$ 1,964,000us-gaap_LinesOfCreditCurrent	$ 1,736,000us-gaap_LinesOfCreditCurrent
Restricted Cash and Investments, Current	2,100,000	2,100,000
Long term, Total Credit Facility	59,209,000evlv_LongtermTotalCreditFacility	52,707,000evlv_LongtermTotalCreditFacility
Long-term Line of Credit, Noncurrent	57,245,000us-gaap_LongTermLineOfCredit	50,971,000us-gaap_LongTermLineOfCredit
Indefinite-Lived License Agreements	12,000,000	12,000,000
Operating and Broadcast Rights [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Indefinite-Lived License Agreements	$ 12,000,000	$ 12,000,000

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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