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Consolidated Statements of Cash Flows (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash flows from operating activities:      
Net loss $ (36,140,133)us-gaap_ProfitLoss $ (66,083,532)us-gaap_ProfitLoss $ (19,712,980)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation 626,554us-gaap_Depreciation 328,752us-gaap_Depreciation 173,750us-gaap_Depreciation
Amortization of intangible assets 942,719us-gaap_AmortizationOfIntangibleAssets 1,770,537us-gaap_AmortizationOfIntangibleAssets 1,821,170us-gaap_AmortizationOfIntangibleAssets
Change in value of common stock warrants (348,143)ino_ChangeInValueOfCommonStockWarrants 45,632,669ino_ChangeInValueOfCommonStockWarrants (1,982,620)ino_ChangeInValueOfCommonStockWarrants
Stock-based compensation 5,428,946us-gaap_ShareBasedCompensation 1,868,345us-gaap_ShareBasedCompensation 1,345,613us-gaap_ShareBasedCompensation
Issuance of shares in connection with reverse stock split 57,187us-gaap_LineOfCreditFacilityIncreaseAccruedInterest 0us-gaap_LineOfCreditFacilityIncreaseAccruedInterest 0us-gaap_LineOfCreditFacilityIncreaseAccruedInterest
Amortization of premiums on investments 54,534us-gaap_InvestmentIncomeAmortizationOfPremium 0us-gaap_InvestmentIncomeAmortizationOfPremium 0us-gaap_InvestmentIncomeAmortizationOfPremium
Interest income accrued on short-term investments 0ino_InterestIncomeAccruedOnShortTermInvestmentsCertificatesOfDeposit (484)ino_InterestIncomeAccruedOnShortTermInvestmentsCertificatesOfDeposit (1,147)ino_InterestIncomeAccruedOnShortTermInvestmentsCertificatesOfDeposit
Deferred taxes 27,537ino_RecognitionAmortizationOfDeferredTaxLiabilities 32,274ino_RecognitionAmortizationOfDeferredTaxLiabilities 22,806ino_RecognitionAmortizationOfDeferredTaxLiabilities
Deferred rent 762,616us-gaap_StraightLineRent 410,187us-gaap_StraightLineRent (15,799)us-gaap_StraightLineRent
Transaction costs associated with issuance of warrants 0ino_TransactionCostsAssociatedWithIssuanceofWarrants 315,970ino_TransactionCostsAssociatedWithIssuanceofWarrants 0ino_TransactionCostsAssociatedWithIssuanceofWarrants
Loss on short-term investments 33,990ino_ImpairmentOfLongTermInvestments 38,950ino_ImpairmentOfLongTermInvestments 0ino_ImpairmentOfLongTermInvestments
Loss on disposal of fixed assets 2,959us-gaap_GainLossOnSaleOfPropertyPlantEquipment 1,822us-gaap_GainLossOnSaleOfPropertyPlantEquipment 0us-gaap_GainLossOnSaleOfPropertyPlantEquipment
(Gain) Loss on investment in affiliated entity (2,676,224)ino_ChangeInValueOfInvestmentsInAffiliatedCompany 1,038,745ino_ChangeInValueOfInvestmentsInAffiliatedCompany (1,631,819)ino_ChangeInValueOfInvestmentsInAffiliatedCompany
Gain on sale of intangible assets 0us-gaap_GainLossOnDispositionOfIntangibleAssets (2,000,000)us-gaap_GainLossOnDispositionOfIntangibleAssets (1,151,000)us-gaap_GainLossOnDispositionOfIntangibleAssets
Changes in operating assets and liabilities:      
Accounts receivable 499,176us-gaap_IncreaseDecreaseInAccountsReceivable (2,471,130)us-gaap_IncreaseDecreaseInAccountsReceivable (362,524)us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable from affiliated entity (1,820)us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties 36,234us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties 2,172us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties
Prepaid expenses and other current assets (160,540)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (229,705)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets 363,584us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other current assets from affiliated entity 674,975ino_IncreaseDecreaseInPrepaidExpensesAndOtherCurrentAssetsFromAffiliatedEntity (1,401,258)ino_IncreaseDecreaseInPrepaidExpensesAndOtherCurrentAssetsFromAffiliatedEntity (445,981)ino_IncreaseDecreaseInPrepaidExpensesAndOtherCurrentAssetsFromAffiliatedEntity
Restricted cash 100,762us-gaap_IncreaseDecreaseInRestrictedCash (352)us-gaap_IncreaseDecreaseInRestrictedCash (351)us-gaap_IncreaseDecreaseInRestrictedCash
Other assets (72,493)us-gaap_IncreaseDecreaseInOtherOperatingAssets 26,793us-gaap_IncreaseDecreaseInOtherOperatingAssets (14,794)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable and accrued expenses 1,487,072us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 2,164,045us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (790,844)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Accounts payable and accrued expenses due to affiliated entity (493,848)us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties 334,980us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties 166,931us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties
Deferred revenue (260,719)us-gaap_IncreaseDecreaseInDeferredRevenue 3,179,721us-gaap_IncreaseDecreaseInDeferredRevenue 282,048us-gaap_IncreaseDecreaseInDeferredRevenue
Deferred revenue from affiliated entity (368,751)ino_IncreaseDecreaseInDeferredRevenueFromRelatedParties (375,000)ino_IncreaseDecreaseInDeferredRevenueFromRelatedParties (375,000)ino_IncreaseDecreaseInDeferredRevenueFromRelatedParties
Net cash used in operating activities (29,823,644)us-gaap_NetCashProvidedByUsedInOperatingActivities (15,381,437)us-gaap_NetCashProvidedByUsedInOperatingActivities (22,306,785)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:      
Purchases of investments (47,185,945)us-gaap_PaymentsToAcquireShortTermInvestments (15,399,495)us-gaap_PaymentsToAcquireShortTermInvestments (9,142,220)us-gaap_PaymentsToAcquireShortTermInvestments
Maturities of investments 12,753,719us-gaap_ProceedsFromSaleOfShortTermInvestments 4,339,577us-gaap_ProceedsFromSaleOfShortTermInvestments 14,008,771us-gaap_ProceedsFromSaleOfShortTermInvestments
Purchases of capital assets (1,379,980)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (176,925)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (240,986)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from sale of intangible assets 0us-gaap_ProceedsFromSaleOfIntangibleAssets 2,000,000us-gaap_ProceedsFromSaleOfIntangibleAssets 650,000us-gaap_ProceedsFromSaleOfIntangibleAssets
Net cash (used in) provided by investing activities (35,812,206)us-gaap_NetCashProvidedByUsedInInvestingActivities (9,236,843)us-gaap_NetCashProvidedByUsedInInvestingActivities 5,275,565us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:      
Proceeds from issuance of common stock and warrants, net of issuance costs 59,209,182us-gaap_ProceedsFromIssuanceOfCommonStock 32,883,705us-gaap_ProceedsFromIssuanceOfCommonStock 5,325,141us-gaap_ProceedsFromIssuanceOfCommonStock
Proceeds from stock option and warrant exercises 13,252,543ino_ProceedsfromStockOptionandWarrantExercises 19,808,232ino_ProceedsfromStockOptionandWarrantExercises 0ino_ProceedsfromStockOptionandWarrantExercises
Net cash provided by financing activities 72,461,725us-gaap_NetCashProvidedByUsedInFinancingActivities 52,691,937us-gaap_NetCashProvidedByUsedInFinancingActivities 5,325,141us-gaap_NetCashProvidedByUsedInFinancingActivities
Effect of exchange rate changes on cash and cash equivalents (1,689)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 118us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 1,984us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Increase (Decrease) in cash and cash equivalents 6,824,186us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 28,073,775us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (11,704,095)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 33,719,796us-gaap_CashAndCashEquivalentsAtCarryingValue 5,646,021us-gaap_CashAndCashEquivalentsAtCarryingValue 17,350,116us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period 40,543,982us-gaap_CashAndCashEquivalentsAtCarryingValue 33,719,796us-gaap_CashAndCashEquivalentsAtCarryingValue 5,646,021us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosure of non-cash activities      
Lease incentive recorded as fixed assets and deferred rent   2,538,000us-gaap_LeaseIncentiveReceivable 0us-gaap_LeaseIncentiveReceivable
Tenant Improvements $ 933,000us-gaap_TenantImprovements