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Summary of Significant Accounting Policies (Details Narrative) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Stock options issue        
Stock options price per share $ 1.50us-gaap_SharePrice   $ 1.50us-gaap_SharePrice
Service revenue contributed, percentage 5.00%emri_PercentageOfServiceRevenueContributed    
EMRISE Electronics Ltd [Member]      
Gross pucrchase price $ 22,000emri_BusinessAcquisitionGrossPucrchasePrice
/ dei_LegalEntityAxis
= emri_EMRISEElectronicsLtdMember
   
Deposit $ 1,300us-gaap_Deposits
/ dei_LegalEntityAxis
= emri_EMRISEElectronicsLtdMember