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INCOME TAXES (Details 3)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income tax benefits computed using the federal statutory income tax rate      
Statutory rate (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State taxes, net of benefit (4.80%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (2.60%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes (14.20%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Permanent differences:      
Derivative losses 0.70%nviv_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInDerivativeLiabilities 17.10%nviv_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInDerivativeLiabilities (127.40%)nviv_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInDerivativeLiabilities
Other 2.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (1.90%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
R&D tax credit (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch (0.40%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch 7.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
True up, past year 2.20%nviv_EffectiveIncomeTaxRateReconciliationTrueUpPastYearPercent 0.00%nviv_EffectiveIncomeTaxRateReconciliationTrueUpPastYearPercent 0.00%nviv_EffectiveIncomeTaxRateReconciliationTrueUpPastYearPercent
Increase in valuation reserve 34.30%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 19.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 102.50%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effective tax rate 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations