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Financing Arrangements - Schedule of Line of credit (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Lines of credit $ 135us-gaap_LinesOfCreditCurrent $ 709us-gaap_LinesOfCreditCurrent
Lloyds TSB Commerical Finance [Member]    
Lines of credit 135us-gaap_LinesOfCreditCurrent
/ us-gaap_LineOfCreditFacilityAxis
= emri_LloydsTsbCommericalFinanceMember
328us-gaap_LinesOfCreditCurrent
/ us-gaap_LineOfCreditFacilityAxis
= emri_LloydsTsbCommericalFinanceMember
FACTOCIC [Member]    
Lines of credit    $ 381us-gaap_LinesOfCreditCurrent
/ us-gaap_LineOfCreditFacilityAxis
= emri_FACTOCICMember