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Stock-Based Compensation (Details Narrative) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Stock based compensation expense $ 11us-gaap_ShareBasedCompensation $ 5us-gaap_ShareBasedCompensation  
Compensation expense        
2007 Stock Incentive Plan [Member]      
Restricted stock award number of shares     6,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= emri_TwentyZeroSevenStockIncentivePlanMember