Annual report pursuant to Section 13 and 15(d)

Notes Payable (Details)

v2.4.1.9
Notes Payable (Details) (USD $)
1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 15, 2014
Jun. 30, 2013
Dec. 31, 2011
Dec. 31, 2011
installment
Jun. 25, 2013
Mar. 31, 2012
Jun. 24, 2013
Jun. 25, 2013
Mar. 31, 2014
Jul. 31, 2012
Mar. 04, 2014
Notes Payable [Line Items]                              
Warrants, exercise price   $ 2.27us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1                          
Debt instrument, debt discount   $ 829,019us-gaap_DebtInstrumentUnamortizedDiscount $ 743,062us-gaap_DebtInstrumentUnamortizedDiscount                        
Repayments of notes payable   25,000,000us-gaap_RepaymentsOfNotesPayable 5,982,155us-gaap_RepaymentsOfNotesPayable 1,285,046us-gaap_RepaymentsOfNotesPayable                      
Loss on extinguishment of debt   2,610,196us-gaap_GainsLossesOnExtinguishmentOfDebt 1,372,266us-gaap_GainsLossesOnExtinguishmentOfDebt 0us-gaap_GainsLossesOnExtinguishmentOfDebt                      
Debt committed upon the approval of Lymphoseek on consistent terms 20,000,000navb_LineOfCreditFacilityIncreaseAdditionalBorrowingsUponLymphoseekApproval                            
Interest rate stated percentage       2.80%us-gaap_DebtInstrumentInterestRateStatedPercentage                      
Change in fair value of financial instruments   (1,342,389)navb_ChangeinFairValueofFinancialInstruments (112,073)navb_ChangeinFairValueofFinancialInstruments 32,110navb_ChangeinFairValueofFinancialInstruments                      
Interest expense related to debt   3,700,000us-gaap_InterestExpenseDebt 2,800,000us-gaap_InterestExpenseDebt 1,200,000us-gaap_InterestExpenseDebt                      
Non-cash interest expense related to debt   844,000navb_InterestExpenseRecordedRelatedToAmortizationOfDebtDiscountsAndDeferredFinancingCosts 765,000navb_InterestExpenseRecordedRelatedToAmortizationOfDebtDiscountsAndDeferredFinancingCosts 545,000navb_InterestExpenseRecordedRelatedToAmortizationOfDebtDiscountsAndDeferredFinancingCosts                      
Principal maturities in 2015   5,200,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths                          
Principal maturities in 2016   7,300,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo                          
Principal maturities in 2017   7,600,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree                          
Principal maturities in 2018   8,300,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour                          
Principal maturities in 2019   5,400,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive                          
R-NAV [Member]                              
Notes Payable [Line Items]                              
Promissory note payable         666,666navb_EquityMethodInvestmentPromissoryNotePayable
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember
                   
Federal Funds Rate [Member] | R-NAV [Member]                              
Notes Payable [Line Items]                              
Debt instrument, spread on variable rate         0.31%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= navb_RNAVMember
/ us-gaap_VariableRateAxis
= navb_FederalFundsRateMember
                   
Common Stock [Member]                              
Notes Payable [Line Items]                              
Number of common shares underlying Series B Preferred Stock   14,777,130navb_NumberofcommonsharesunderlyingSeriesBPreferredStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
                         
Shares conversion, number of common stock equivalent to each preferred stock   3,270navb_SharesConversionNumberOfCommonStockEquivalentToEachPreferredStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
      3,270navb_SharesConversionNumberOfCommonStockEquivalentToEachPreferredStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
                 
Series B Preferred Stock [Member]                              
Notes Payable [Line Items]                              
Conversion of Series B preferred stock to common stock, shares     2,364.9us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
    2,364.9us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
                 
Series GG Warrants [Member]                              
Notes Payable [Line Items]                              
Warrants, exercise price   $ 2.10us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
                         
Warrants, expiration date   Dec. 29, 2016                          
Derivative liabilities             520,478us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
520,478us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
             
Provision effective period             0 years 0 months 365 days                
Series HH Warrants [Member]                              
Notes Payable [Line Items]                              
Warrants, number of securities called by warrants           301,205us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
                 
Warrants, exercise price   $ 2.49us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
                         
Warrants, expiration date   Jun. 25, 2023                          
Hercules Secured Term Promissory Note [Member]                              
Notes Payable [Line Items]                              
Current borrowing capacity             7,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
7,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Debt instrument, spread on variable rate               6.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Debt Instrument, minimum effective interest rate               10.00%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Monthly installments               30navb_DebtInstrumentNumberOfPeriodicPayments
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Debt instrument, frequency of payment               monthly              
Debt conversion, original debt, amount convertible               1,500,000us-gaap_DebtConversionOriginalDebtAmount1
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Beneficial conversion feature               24,888us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Debt issuance costs               593,339us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Debt instrument, debt discount             545,366us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
545,366us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Hercules Secured Term Promissory Note [Member] | Series GG Warrants [Member]                              
Notes Payable [Line Items]                              
Warrants, number of securities called by warrants             333,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
333,333us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Warrants, exercise price             $ 2.10us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
$ 2.10us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesGgWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_HerculesSecuredTermPromissoryNoteMember
             
Warrants, expiration date               Dec. 31, 2016              
Hercules Technology Ii Lp Notes [Member]                              
Notes Payable [Line Items]                              
Debt instrument, debt discount                 187,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
    187,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
     
Repayments of notes payable                 4,400,000us-gaap_RepaymentsOfNotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
1,300,000us-gaap_RepaymentsOfNotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
1,300,000us-gaap_RepaymentsOfNotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
       
Debt instrument, end of term fee                 250,000navb_DebtInstrumentEndOfTermFee
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
           
Debt instrument, early payment penalty                 66,000navb_DebtInstrumentEarlyPaymentPenalty
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
    66,000navb_DebtInstrumentEarlyPaymentPenalty
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
     
Loss on extinguishment of debt                       429,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
     
Unamortized debt issuance expense                 176,000us-gaap_UnamortizedDebtIssuanceExpense
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
    176,000us-gaap_UnamortizedDebtIssuanceExpense
/ us-gaap_DebtInstrumentAxis
= navb_HerculesTechnologyIiLpNotesMember
     
Platinum Montaur Life Sciences Llc Credit Facility [Member]                              
Notes Payable [Line Items]                              
Maximum borrowing capacity   35,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Debt instrument, spread on variable rate   6.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Repayments of notes payable     4,800,000us-gaap_RepaymentsOfNotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
    4,781,333us-gaap_RepaymentsOfNotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                 
Interest rate stated percentage   10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Interest rate in addition to amended agreement   0.125%navb_InterestRateInAdditionToAmendedAgreement
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Percentage of VWAP for conversion calculation   90.00%navb_PercentageofVWAPforconversioncalculation
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Number of days preceding the date of conversion request   10 days                          
Minimum revenue from sales and licensing for mandatory repayment due   2,000,000navb_MinimumRevenueFromSalesAndLicensingForMandatoryRepaymentDue
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Warrants not settleable in cash fair value                 943,000us-gaap_WarrantsNotSettleableInCashFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
    943,000us-gaap_WarrantsNotSettleableInCashFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
     
Platinum notes payable   5,600,000us-gaap_ConvertibleDebtFairValueDisclosures
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Change in fair value of financial instruments     106,000navb_ChangeinFairValueofFinancialInstruments
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                       
Notes payable   3,200,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Remaining borrowing capacity   31,800,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                         
Platinum Montaur Life Sciences Llc Credit Facility [Member] | Series X Warrants And Series AA Warrants [Member]                              
Notes Payable [Line Items]                              
Number of common shares underlying Series B Preferred Stock   7,733,223navb_NumberofcommonsharesunderlyingSeriesBPreferredStock
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesXWarrantsAndSeriesAaWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
      7,733,223navb_NumberofcommonsharesunderlyingSeriesBPreferredStock
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesXWarrantsAndSeriesAaWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
                 
Second Amended Platinum Note [Member]                              
Notes Payable [Line Items]                              
Interest rate stated percentage rate range minimum                         10.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= navb_SecondAmendedPlatinumNoteMember
   
Debt instrument, effective interest rate   10.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= navb_SecondAmendedPlatinumNoteMember
                         
Second Amended Platinum Note [Member] | Base Rate [Member]                              
Notes Payable [Line Items]                              
Debt instrument, spread on variable rate                         6.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= navb_SecondAmendedPlatinumNoteMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember
   
Second Amended Platinum Note [Member] | Oxford Loan Agreement, Interest Rate [Member]                              
Notes Payable [Line Items]                              
Debt instrument, spread on variable rate                         0.125%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= navb_SecondAmendedPlatinumNoteMember
/ us-gaap_VariableRateAxis
= navb_OxfordLoanAgreementInterestRateMember
   
General Electric Capital Corporation [Member]                              
Notes Payable [Line Items]                              
Debt issuance costs   120,000us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= navb_GeneralElectricCapitalCorporationMember
881,000us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= navb_GeneralElectricCapitalCorporationMember
                       
End-of-term fee amount                 2,400,000navb_DebtInstrumentEndoftermFeeAmount
/ us-gaap_DebtInstrumentAxis
= navb_GeneralElectricCapitalCorporationMember
    2,400,000navb_DebtInstrumentEndoftermFeeAmount
/ us-gaap_DebtInstrumentAxis
= navb_GeneralElectricCapitalCorporationMember
     
General Electric Capital Corporation [Member] | Series HH Warrants [Member]                              
Notes Payable [Line Items]                              
Warrants, exercise price           2.49us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_GeneralElectricCapitalCorporationMember
                 
GECC, MidCap Financial SBIC and LP (MidCap) [Member]                              
Notes Payable [Line Items]                              
Debt instrument, frequency of payment           monthly                  
Debt issuance costs                       881,000us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Debt instrument, debt discount                 1,900,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    1,900,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Loss on extinguishment of debt   2,600,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
                         
Debt instrument, effective interest rate                 9.83%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    9.83%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Debt instrument face amount                 25,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    25,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Debt instrument, number of periodic installments           30navb_NumberOfInstallmentPaymentsOnNotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
                 
Percentage of original principal amount of loan to be paid as a fee                       4.00%navb_PercentageOfOriginalPrincipalAmountOfLoanToBePaidAsFee
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Repayments of long-term debt                         26,700,000us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
   
Early redemption fee amount                             500,000navb_DebtInstrumentEarlyRedemptionFeeAmount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
End-of-term fee amount                 1,000,000navb_DebtInstrumentEndoftermFeeAmount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    1,000,000navb_DebtInstrumentEndoftermFeeAmount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    1,000,000navb_DebtInstrumentEndoftermFeeAmount
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
GECC, MidCap Financial SBIC and LP (MidCap) [Member] | Series HH Warrants [Member]                              
Notes Payable [Line Items]                              
Warrants, number of securities called by warrants                 301,205us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    301,205us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Warrants, exercise price                 $ 2.49us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
    $ 2.49us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_SeriesHhWarrantsMember
/ us-gaap_DebtInstrumentAxis
= navb_GECCandMidCapFinancialMember
     
Oxford Finance, LLC [Member]                              
Notes Payable [Line Items]                              
Debt issuance costs                         120,000us-gaap_DebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
   
Debt instrument, debt discount   2,400,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
                         
Interest rate stated percentage                             8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
Notes payable   30,000,000us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
                         
Debt instrument face amount                             30,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
Debt instrument term   48 months                          
Final payment multiplier percent   7.95%navb_DebtInstrumentFinalPaymentMultiplierPercent
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
                         
Unamortized discount (premium), net                             3,000,000us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
Deferred finance costs net   90,000us-gaap_DeferredFinanceCostsNet
/ us-gaap_DebtInstrumentAxis
= navb_OxfordFinanceLLCMember
                         
Series KK Warrants [Member] | Oxford Finance, LLC [Member]                              
Notes Payable [Line Items]                              
Warrants, number of securities called by warrants                             391,032us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_OxfordFinanceLLCMember
/ us-gaap_DebtInstrumentAxis
= navb_SeriesKKwarrantsMember
Warrants, exercise price                             $ 1.918us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= navb_OxfordFinanceLLCMember
/ us-gaap_DebtInstrumentAxis
= navb_SeriesKKwarrantsMember
Hercules Loan and Security Agreement [Member]                              
Notes Payable [Line Items]                              
Debt instrument, spread on variable rate                           0.125%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= navb_HerculesLoanAndSecurityAgreementMember
 
Platinum Credit Facility [Member]                              
Notes Payable [Line Items]                              
Maximum borrowing capacity                           50,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
 
Current borrowing capacity                           15,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
 
Debt instrument, spread on variable rate                           6.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
 
Debt Instrument, minimum effective interest rate                           10.00%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
 
Amount potentially available on terms to be negotiated 15,000,000navb_LineOfCreditFacilityIncreaseAdditionalBorrowingsTermsNotNegotiated
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
                           
Proceeds from lines of credit     4,000,000us-gaap_ProceedsFromLinesOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
4,000,000us-gaap_ProceedsFromLinesOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
                     
Significant Unobservable Inputs (Level 3) [Member] | Platinum Montaur Life Sciences Llc Credit Facility [Member]                              
Notes Payable [Line Items]                              
Change in fair value of financial instruments   $ 1,348,000navb_ChangeinFairValueofFinancialInstruments
/ us-gaap_DebtInstrumentAxis
= navb_PlatinumMontaurLifeSciencesLlcCreditFacilityMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member