Fair Value Hierarchy (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2013
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Fair Value Measurements [Line Items] |
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Change in fair value of financial instruments |
$ (1,342,389)navb_ChangeinFairValueofFinancialInstruments
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$ (112,073)navb_ChangeinFairValueofFinancialInstruments
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$ 32,110navb_ChangeinFairValueofFinancialInstruments
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Derivative liabilities |
0us-gaap_DerivativeLiabilities
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7,692,087us-gaap_DerivativeLiabilities
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Fair Value, Measurements, Recurring [Member] |
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Fair Value Measurements [Line Items] |
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Platinum notes payable |
5,615,764us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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4,268,062us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Derivative liabilities |
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7,692,087us-gaap_DerivativeLiabilities / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |
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Fair Value Measurements [Line Items] |
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Derivative liabilities |
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7,692,087us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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7,700,000us-gaap_DerivativeLiabilities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |
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Fair Value Measurements [Line Items] |
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Platinum notes payable |
5,615,764us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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4,268,062us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember
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Platinum Montaur Life Sciences Llc Credit Facility [Member] |
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Fair Value Measurements [Line Items] |
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Change in fair value of financial instruments |
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106,000navb_ChangeinFairValueofFinancialInstruments / us-gaap_DebtInstrumentAxis = navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
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Platinum notes payable |
5,600,000us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_DebtInstrumentAxis = navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
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Platinum Montaur Life Sciences Llc Credit Facility [Member] | Significant Unobservable Inputs (Level 3) [Member] |
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Fair Value Measurements [Line Items] |
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Change in fair value of financial instruments |
$ 1,348,000navb_ChangeinFairValueofFinancialInstruments / us-gaap_DebtInstrumentAxis = navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
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