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Related Party Transactions (Details) (USD $)
0 Months Ended 12 Months Ended 1 Months Ended
Mar. 24, 2010
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 28, 2011
Mar. 24, 2012
May 31, 2014
Related-Party Transactions (Textual) [Abstract]              
Long-term other assets   $ 474,568us-gaap_OtherAssetsNoncurrent $ 402,075us-gaap_OtherAssetsNoncurrent        
Ownership percentage by parent             91.00%us-gaap_MinorityInterestOwnershipPercentageByParent
Receivable from sale of Intangible Assets   2,000,000ino_ReceivablefromsaleofIntangibleAssets          
Percentage of ownership   20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage          
Maximum additional equity fundraising   10,000,000ino_MaximumAmountofAdditionalEquityFundraising          
GeneOne Life Sciences              
Related-Party Transactions (Textual) [Abstract]              
Payment received for license granted 3,000,000us-gaap_ProceedsFromLicenseFeesReceived
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_GeneOneLifeSciencesMember
           
Deferred revenue from affiliated entity 3,000,000ino_DeferredRevenueFromAffiliatedEntity
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_GeneOneLifeSciencesMember
           
Period over which deferred revenue from affiliated entity will be recognized in years 8 years            
GeneOne (affiliated entity)              
Related-Party Transactions (Textual) [Abstract]              
Revenue from related parties   479,000us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
425,000us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
577,000us-gaap_RevenueFromRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
     
Operating expenses related to affiliated entity   4,200,000us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
2,300,000us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
871,000us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
     
Accounts receivable from related parties   2,000us-gaap_DueFromOtherRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
0us-gaap_DueFromOtherRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
       
Long-term other assets   260,000us-gaap_OtherAssetsNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
231,000us-gaap_OtherAssetsNoncurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
       
Percentage of ownership   10.60%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
14.70%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_VgxInternationalMember
       
OncoSec              
Related-Party Transactions (Textual) [Abstract]              
Payments received from affiliate     $ 3,000,000ino_ProceedsFromSaleOfIntangibleAssetsToRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_OncosecMember
       
OncoSec | First warrant              
Related-Party Transactions (Textual) [Abstract]              
Common stock purchase warrant (shares)         1,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_FinancialInstrumentAxis
= ino_FirstWarrantMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_OncosecMember
   
Term of the warrants in years         5 years    
Exercise price of a five-year warrant ($ per share)         $ 1.20invest_InvestmentWarrantsExercisePrice
/ us-gaap_FinancialInstrumentAxis
= ino_FirstWarrantMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_OncosecMember
   
OncoSec | Second warrant              
Related-Party Transactions (Textual) [Abstract]              
Common stock purchase warrant (shares)           3,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_FinancialInstrumentAxis
= ino_SecondWarrantMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_OncosecMember
 
Term of the warrants in years           5 years  
Exercise price of a five-year warrant ($ per share)           $ 1.00invest_InvestmentWarrantsExercisePrice
/ us-gaap_FinancialInstrumentAxis
= ino_SecondWarrantMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= ino_OncosecMember