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Stockholders' Equity (Details Textual) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 22 Months Ended | 1 Months Ended |  |
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Jun. 05, 2014 | Jul. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | May 22, 2014 | May 14, 2010 | Mar. 31, 2013 | Jun. 30, 2012 | Dec. 31, 2014 | Mar. 31, 2014 | May 31, 2013 | May 30, 2013
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock split ratio | 0.25 us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (Dollars per share) |  |  | $ 0.001 us-gaap_PreferredStockParOrStatedValuePerShare | $ 0.001 us-gaap_PreferredStockParOrStatedValuePerShare |  |  |  |  |  | 0.001 us-gaap_PreferredStockParOrStatedValuePerShare |  |  |
Convertible preferred stock, shares issued upon conversion, conversion price ($ per share) |  |  | $ 27.20 ino_ConvertiblePreferredStockSharesIssuedUponConversionConversionPricePerShare |  |  |  |  |  |  |  |  |  |
Daily market price triggering mandatory conversion ($ per share) |  |  | $ 72.00 ino_PreferredStockConversionDailyMarketPriceTriggeringMandatoryConversion |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  | $ 59,209,182 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 32,883,705 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 5,325,141 us-gaap_ProceedsFromIssuanceOfCommonStock |  |  |  |  |  |  |  |
Common stock, shares authorized (shares) |  |  | 600,000,000 us-gaap_CommonStockSharesAuthorized | 600,000,000 us-gaap_CommonStockSharesAuthorized |  |  |  |  |  | 600,000,000 us-gaap_CommonStockSharesAuthorized |  | 600,000,000 us-gaap_CommonStockSharesAuthorized | 300,000,000 us-gaap_CommonStockSharesAuthorized
Transaction costs in warrant issuance |  |  | 0 ino_TransactionCostsAssociatedWithIssuanceofWarrants | 315,970 ino_TransactionCostsAssociatedWithIssuanceofWarrants | 0 ino_TransactionCostsAssociatedWithIssuanceofWarrants |  |  |  |  |  |  |  |
Weighted average price ($ per share) on sale of common stock |  |  |  | $ 4.96 ino_WeightedAveragePricePerShareOnSaleOfCommonStock |  |  |  |  |  |  |  |  |
Number of securities called by warrants or rights expired |  | 83,334 ino_ClassofWarrantorRightNumberofSecuritiesCalledbyWarrantsorRightsWarrantsExpired |  |  |  |  |  |  |  |  |  |  |
Vesting period of Incentive Plan |  |  | 3 years |  |  |  |  |  |  |  |  |  |
Contractual year term of Incentive Plan |  |  | 10 years |  |  |  |  |  |  |  |  |  |
Number of options outstanding to purchase common stock |  |  | 4,840,514 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 4,134,591 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  |  |  |  |  | 4,840,514 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  |  |
Share-based compensation |  |  | 5,428,946 us-gaap_ShareBasedCompensation | 1,868,345 us-gaap_ShareBasedCompensation | 1,345,613 us-gaap_ShareBasedCompensation |  |  |  |  |  |  |  |
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized |  |  | 5,300,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized | 956,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |  |  |  |  | 5,300,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |  |
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition |  |  | 2 years 0 months 0 days | 1 year 10 months 0 days |  |  |  |  |  |  |  |  |
Aggregate intrinsic value of options outstanding |  |  | 18,100,000 ino_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingAggregateIntrinsicValue |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value for options exercisable |  |  | 14,600,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |  |  |  |  |  | 14,600,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |  |
Options exercisable, remaining contractual term |  |  | 4 years 8 months 12 days |  |  |  |  |  |  |  |  |  |
Number of options expected to vest |  |  | 1,191,093 ino_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExpectedtoVestOutstandingNumber |  |  |  |  |  |  | 1,191,093 ino_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExpectedtoVestOutstandingNumber |  |  |
Options, expirations in period, weighted average exercise price ($ per share) |  |  | $ 15.95 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice | $ 5.32 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice | $ 7.32 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice |  |  |  |  |  |  |  |
Options, expirations in period |  |  | 70,517 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod | 124,003 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod | 51,875 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod |  |  |  |  |  |  |  |
Options, grants in period, weighted average grant date fair value ($ per share) |  |  | $ 11.52 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 1.76 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 1.88 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |  |  |  |  |  |  |
Proceeds from stock options exercised |  |  | 1,400,000 us-gaap_ProceedsFromStockOptionsExercised | 1,600,000 us-gaap_ProceedsFromStockOptionsExercised | 0 us-gaap_ProceedsFromStockOptionsExercised |  |  |  |  |  |  |  |
Options, exercises in period, aggregate intrinsic value |  |  | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 2,500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |  |  |  |  |  |  |  |
Employee |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  | 4,800,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = ino_EmployeeMember | 1,200,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = ino_EmployeeMember | 1,200,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = ino_EmployeeMember |  |  |  |  |  |  |  |
Research and Development Expense |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  | 2,800,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember | 550,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember | 555,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember |  |  |  |  |  |  |  |
General and Administrative Expense |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation |  |  | 2,000,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember | 605,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember | 638,000 us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |  |  |  |  |  |  |  |
Non Employee |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options outstanding to purchase common stock |  |  | 937,517 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_IncomeStatementLocationAxis = ino_NonEmployeeMember |  |  |  |  |  |  | 937,517 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_IncomeStatementLocationAxis = ino_NonEmployeeMember |  |  |
Allocated share-based compensation expense |  |  | 585,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = ino_NonEmployeeMember | 714,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = ino_NonEmployeeMember | 153,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = ino_NonEmployeeMember |  |  |  |  |  |  |  |
Stock and Cash Based Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Increased number of securities available for future issuance |  |  |  |  |  | 1,250,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember | 500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |  |  |  |
Number of potential shares authorized for issuance under a share-based compensation plan |  |  |  |  |  |  | 513,833 ino_NumberOfPotentialSharesAuthorizedForIssuanceUnderShareBasedCompensationPlan / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |  |  |  |
Reserved number of shares under the Incentive Plan |  |  | 4,742,831 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |  |  |  |  | 4,742,831 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |
Increased aggregate number of shares available for grants under the Incentive Plan |  |  | 967,598 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |  |  |  |  | 967,598 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |
Number of shares of vested restricted stock outstanding under the plan |  |  | 60,000 ino_NumberOfSharesOfVestedRestrictedStockOutstandingUnderPlan / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |  |  |  |  |  |  |  |
Number of common stock shares outstanding under the Incentive Plan |  |  | 3,288,761 us-gaap_CommonStockOtherSharesOutstanding / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |  |  |  |  | 3,288,761 us-gaap_CommonStockOtherSharesOutstanding / us-gaap_AwardTypeAxis = ino_StockAndCashBasedIncentivePlanMember |  |  |
Amended 2000 Stock Option Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options outstanding to purchase common stock |  |  | 197,629 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ino_AmendedTwoThousandStockOptionPlanMember |  |  |  |  |  |  | 197,629 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = ino_AmendedTwoThousandStockOptionPlanMember |  |  |
Common Stock Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants expired to purchase number of shares of common stock |  |  |  | 14,555 ino_WarrantsExpiredToPurchaseNumberOfSharesOfCommonStock / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_WarrantMember |  |  |  |  |  |  |  |  |
Underwritten public offering |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, capital shares reserved for future issuance (shares) |  |  |  |  |  |  |  | 6,844,317 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember |  |  |  |  |
Class of warrant or right, number of securities called by warrants or rights |  |  |  |  |  |  |  | 3,422,158 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember |  |  |  |  |
Purchase price for common stock and warrant ($ per share/unit) |  |  |  |  |  |  |  | 2.20 ino_PurchasePricePerUnitOfCommonStockAndWarrant / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember |  |  |  |  |
Class of warrant or right, number of securities called by each warrant or right |  |  |  |  |  |  |  | 0.50 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember |  |  |  |  |
Class of warrant or right, securities called by warrants or rights, price per share |  |  |  |  |  |  |  | $ 3.1744 ino_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsPricePerShare / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember |  |  |  |  |
Term of the warrants in years |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |
Potential proceeds from issue of common stock |  |  |  |  |  |  |  | 14,000,000 ino_PotentialProceedsFromIssueOfCommonStock / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember |  |  |  |  |
Sales Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Potential sales proceeds |  |  |  |  |  |  |  |  | 25,000,000.0 ino_PotentialProceedsFromSaleOfCommonStockThroughPlacementAgentForResale / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = us-gaap_ShareDistributionMember |  |  |  |
Rate of commission or discount rate to placement agent |  |  |  |  |  |  |  |  | 3.00%ino_RateOfCommissionOrDiscountToPlacementAgent / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = us-gaap_ShareDistributionMember |  |  |  |
Shares of common stock sold under sales agreement |  |  |  | 3,925,167 ino_CommonStockSoldUnderSalesAgreement / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = us-gaap_ShareDistributionMember |  |  |  |  |  |  |  |  |
Net proceeds from the transaction |  |  |  | 18,900,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = us-gaap_ShareDistributionMember |  |  |  |  |  |  |  |  |
VGX Equity Compensation Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options outstanding to purchase common stock |  |  | 1,354,124 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_VgxEquityCompensationPlanMember |  |  |  |  |  |  | 1,354,124 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_VgxEquityCompensationPlanMember |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Average daily trading volume triggering mandatory conversion (shares) |  |  | 6,250 ino_ConvertiblePreferredStockAverageDailyTradingVolumeTriggeringMandatoryConversion / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |
Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares converted (shares) |  |  | 3 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |  |  |  |  |  |  |  |
Preferred Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, redemption price ($ per share) |  |  | $ 10,000 us-gaap_PreferredStockRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |  |  |  |  | 10,000 us-gaap_PreferredStockRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |
Preferred stock, par value (Dollars per share) |  |  | $ 0.001 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember | $ 0.001 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |  |  |  | 0.001 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |
Notice period for mandatory conversion of preferred stock |  |  | 30 days |  |  |  |  |  |  |  |  |  |
Convertible preferred stock, shares issued upon conversion (shares) |  |  | 8,456 us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |  |  |  |  | 8,456 us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesCPreferredStockMember |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversions of preferred stock to common stock, shares |  |  | 1,103 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
March 2013 financing |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, warrants exercised |  |  | 471,590 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_MarchTwoThousandThirteenFinancingMember | 2,666,477 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_MarchTwoThousandThirteenFinancingMember |  |  |  |  |  | 3,138,067 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_MarchTwoThousandThirteenFinancingMember |  |  |
Net proceeds from the transaction |  |  | 1,500,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_ClassOfWarrantOrRightAxis = ino_MarchTwoThousandThirteenFinancingMember | 8,500,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_ClassOfWarrantOrRightAxis = ino_MarchTwoThousandThirteenFinancingMember |  |  |  |  |  |  |  |  |
January Two Thousand Eleven Financing |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, warrants exercised |  |  | 1,673,750 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_JanuaryTwoThousandElevenFinancingMember | 967,550 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_JanuaryTwoThousandElevenFinancingMember |  |  |  |  |  |  |  |  |
Net proceeds from the transaction |  |  | 9,400,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_ClassOfWarrantOrRightAxis = ino_JanuaryTwoThousandElevenFinancingMember | 5,400,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_ClassOfWarrantOrRightAxis = ino_JanuaryTwoThousandElevenFinancingMember |  |  |  |  |  |  |  |  |
Warrants Assumed in June Two Thousand Nine Merger |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, warrants exercised |  |  | 274,083 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_WarrantsAssumedInJuneTwoThousandNineMergerMember |  |  |  |  |  |  |  |  |  |
Net proceeds from the transaction |  |  | 1,000,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_ClassOfWarrantOrRightAxis = ino_WarrantsAssumedInJuneTwoThousandNineMergerMember |  |  |  |  |  |  |  |  |  |
December Two Thousand Eleven Financing |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, warrants exercised |  |  |  | 1,443,696 ino_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_ClassOfWarrantOrRightAxis = ino_DecemberTwoThousandElevenFinancingMember |  |  |  |  |  |  |  |  |
Net proceeds from the transaction |  |  |  | 3,800,000 ino_ProceedsFromIssuanceOfCommonStockAndWarrants / us-gaap_ClassOfWarrantOrRightAxis = ino_DecemberTwoThousandElevenFinancingMember |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversions of preferred stock to common stock, shares |  |  | 1,103 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock for cash, net of financing costs, shares (shares) |  |  | 5,452,725 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 3,925,167 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 2,336,153 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |
Common stock | Underwritten public offering |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock for cash, net of financing costs, shares (shares) |  |  |  |  |  |  |  |  |  |  | 5,452,725 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Public offering price ($ per share) |  |  |  |  |  |  |  |  |  |  | $ 11.60 ino_SaleofStockPublicOfferingPricePerShare / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  |  |  |  | $ 59,200,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Common stock | Underwritten Public Offering Overallotment Option |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, capital shares reserved for future issuance (shares) |  |  |  |  |  |  |  |  |  |  | 711,225 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis = ino_UnderwrittenPublicOfferingOverallotmentOptionMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |

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- Definition Common stock sold under sales agreement. + References No definition available. + Details
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- Definition Convertible Preferred Stock, Average Daily Trading Volume Triggering Mandatory Conversion + References No definition available. + Details
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- Definition Number of potential shares authorized for issuance under a share-based compensation plan. + References No definition available. + Details
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- Definition Number of shares of vested restricted stock outstanding under the plan. + References No definition available. + Details
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- Definition Purchase price per unit of common stock and warrant. + References No definition available. + Details
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- Definition Rate of commission or discount to placement agent. + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Expected to Vest, Outstanding, Number + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Aggregate intrinsic value + References No definition available. + Details
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- Definition Stock Issued During Period, Shares, Warrants Exercised + References No definition available. + Details
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- Definition Warrants expired to purchase number of shares of common stock. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized. + References No definition available. + Details
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Number of shares issued for each share of convertible preferred stock that is converted. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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