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Consolidated Statements of Stockholders' Equity (USD $)
Total
USD ($)
Preferred stock
Common stock
USD ($)
Additional paid-in capital
USD ($)
Accumulated deficit
USD ($)
Accumulated other comprehensive income (loss)
USD ($)
Non- controlling interest
USD ($)
Beginning balance, value at Dec. 31, 2011 $ 47,861,662us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest   $ 33,743us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 257,336,932us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (210,091,174)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 35,393us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ 546,768us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Beginning balance, shares at Dec. 31, 2011   26us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
33,742,282us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of common stock for cash, net of financing costs, shares (shares)     2,336,153us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock for cash, net of financing costs, value 5,325,141us-gaap_StockIssuedDuringPeriodValueNewIssues   2,336us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
5,322,805us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Stock-based compensation 1,345,613us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation     1,345,613us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net loss attributable to common stockholders (19,712,980)us-gaap_ProfitLoss       (19,668,955)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  (44,025)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Unrealized gain on short-term investments 35,985us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax         35,985us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
 
Foreign currency translation adjustments 1,984us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax         1,984us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
 
Ending balance, value at Dec. 31, 2012 34,857,405us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest   36,079us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
264,005,350us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(229,760,129)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
73,362us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
502,743us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending balance, shares at Dec. 31, 2012   26us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
36,078,435us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of common stock for cash, net of financing costs, shares (shares)     3,925,167us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock for cash, net of financing costs, value 18,924,856us-gaap_StockIssuedDuringPeriodValueNewIssues   3,925us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
18,920,931us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Issuance of common stock and warrants for cash, net of financing costs, shares     6,844,317ino_IssuanceOfCommonStockAndWarrantsForCashNetOfFinancingCostsShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock and warrants for cash, net of financing costs, value 14,274,819ino_IssuanceOfCommonStockAndWarrantsForCashNetOfFinancingCosts   6,844ino_IssuanceOfCommonStockAndWarrantsForCashNetOfFinancingCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
14,267,975ino_IssuanceOfCommonStockAndWarrantsForCashNetOfFinancingCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Fair value of common stock warrants issued in connection with equity financing (5,968,244)ino_FairValueOfCommonStockWarrantsIssuedInConnectionWithEquityFinancing     (5,968,244)ino_FairValueOfCommonStockWarrantsIssuedInConnectionWithEquityFinancing
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Exercise of stock options and warrants for cash, shares     5,712,439ino_ExerciseOfStockOptionsAndWarrantsForCashShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Exercise of stock options and warrants for cash, value 19,808,232ino_ExerciseOfStockOptionsAndWarrantsForCash   5,713ino_ExerciseOfStockOptionsAndWarrantsForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
19,802,519ino_ExerciseOfStockOptionsAndWarrantsForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Cashless exercise of warrants, shares     16,032ino_CashlessExerciseofWarrantsShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Cashless exercise of warrants, value 0ino_CashlessExerciseofWarrantsValue   16ino_CashlessExerciseofWarrantsValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(16)ino_CashlessExerciseofWarrantsValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Change in classification of warrants from liability to equity due to exercise 35,370,529ino_ChangeinClassificationofWarrantsfromLiabilitytoEquityDuetoExercise     35,370,529ino_ChangeinClassificationofWarrantsfromLiabilitytoEquityDuetoExercise
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Stock-based compensation 1,868,345us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation     1,868,345us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net loss attributable to common stockholders (66,083,532)us-gaap_ProfitLoss       (66,028,448)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  (55,084)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Unrealized gain on short-term investments (149,845)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax         (149,845)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
 
Foreign currency translation adjustments 118us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax         118us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
 
Ending balance, value at Dec. 31, 2013 52,902,683us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest   52,577us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
348,267,389us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(295,788,577)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(76,365)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
447,659us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending balance, shares at Dec. 31, 2013   26us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
52,576,390us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of shares related to reverse stock split (shares)     6,378us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of shares related to reverse stock split 57,187ino_StockIssuedDuringPeriodValueReverseStockSplits   (6)ino_StockIssuedDuringPeriodValueReverseStockSplits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
57,181ino_StockIssuedDuringPeriodValueReverseStockSplits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Issuance of common stock for cash, net of financing costs, shares (shares)     5,452,725us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of common stock for cash, net of financing costs, value 59,209,182us-gaap_StockIssuedDuringPeriodValueNewIssues   5,453us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
59,203,729us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Conversions of preferred stock to common stock, shares   (3)us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
1,103us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Conversions of preferred stock to common stock, value 0us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities   1us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(1)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Acquisition of non-controlling interest 0us-gaap_MinorityInterestDecreaseFromRedemptions     118,621us-gaap_MinorityInterestDecreaseFromRedemptions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
    (118,621)us-gaap_MinorityInterestDecreaseFromRedemptions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Exercise of stock options and warrants for cash, shares     2,689,868ino_ExerciseOfStockOptionsAndWarrantsForCashShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Exercise of stock options and warrants for cash, value 13,252,543ino_ExerciseOfStockOptionsAndWarrantsForCash   2,689ino_ExerciseOfStockOptionsAndWarrantsForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
13,249,854ino_ExerciseOfStockOptionsAndWarrantsForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Cashless exercise of warrants, shares     14,618ino_CashlessExerciseofWarrantsShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Cashless exercise of warrants, value 0ino_CashlessExerciseofWarrantsValue   15ino_CashlessExerciseofWarrantsValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
(15)ino_CashlessExerciseofWarrantsValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Change in classification of warrants from liability to equity due to exercise 17,002,211ino_ChangeinClassificationofWarrantsfromLiabilitytoEquityDuetoExercise     17,002,211ino_ChangeinClassificationofWarrantsfromLiabilitytoEquityDuetoExercise
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Stock-based compensation 5,428,946us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation     5,428,946us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Net loss attributable to common stockholders (36,140,133)us-gaap_ProfitLoss       (36,121,713)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
  (18,420)us-gaap_ProfitLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Unrealized gain on short-term investments (173,336)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax         (173,336)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
 
Foreign currency translation adjustments (1,689)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax         (1,689)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
 
Ending balance, value at Dec. 31, 2014 $ 111,537,594us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest   $ 60,741us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 443,327,915us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (331,910,290)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ (251,390)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ 310,618us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Ending balance, shares at Dec. 31, 2014   23us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
60,741,082us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember