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Retirement Plans (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Contributions by employer $ 7us-gaap_DefinedBenefitPlanContributionsByEmployer $ 3us-gaap_DefinedBenefitPlanContributionsByEmployer
Contributions to pension plans $ 600us-gaap_DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities $ 550us-gaap_DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities
Minimum [Member]    
Percentage of contributions by employer 2.00%emri_DefinedBenefitPlanContributionsByEmployerPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maximum [Member]    
Percentage of contributions by employer 8.00%emri_DefinedBenefitPlanContributionsByEmployerPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember