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Investment in Affiliated Entity (Details)
Dec. 31, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]    
Percentage of ownership 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage  
VGX International    
Related Party Transaction [Line Items]    
Percentage of ownership 10.60%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
14.70%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember