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Related Party Transactions (Details) (Director [Member], USD $)
12 Months Ended
Dec. 31, 2013
Related Party Transaction [Line Items]  
Legal services compensation paid $ 176,000immd_LegalServicesCompensationCost
2013 [Member]
 
Related Party Transaction [Line Items]  
Legal services compensation paid 82,000immd_LegalServicesCompensationCost
/ us-gaap_AwardDateAxis
= immd_TwoThousandThirteenMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
2014 [Member]
 
Related Party Transaction [Line Items]  
Legal services compensation paid $ 94,000immd_LegalServicesCompensationCost
/ us-gaap_AwardDateAxis
= immd_TwoThousandFourteenMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember