Annual report pursuant to Section 13 and 15(d)

Convertible Securities (Details)

v2.4.1.9
Convertible Securities (Details) (USD $)
1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Sep. 30, 2013
Apr. 30, 2013
Feb. 28, 2013
Jun. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Jun. 30, 2010
Dec. 31, 2012
Nov. 30, 2014
Nov. 30, 2012
Dec. 31, 2013
Debt Instrument [Line Items]                      
Stock issued during period 10,563,381us-gaap_StockIssuedDuringPeriodSharesNewIssues 2,100,000us-gaap_StockIssuedDuringPeriodSharesNewIssues 1,542,389us-gaap_StockIssuedDuringPeriodSharesNewIssues                
Platinum Montaur Life Sciences Llc Credit Facility [Member] | Series X Warrants And Series AA Warrants [Member]                      
Debt Instrument [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
           
Series B Preferred Stock [Member]                      
Debt Instrument [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
         
Consecutive trading days         180 days            
Preferred stock shares outstanding         4,519us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
7,565us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
        7,565us-gaap_PreferredStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
Series B Preferred Stock [Member] | Maximum [Member]                      
Debt Instrument [Line Items]                      
Share price       7.00us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
             
Series B Preferred Stock [Member] | Minimum [Member]                      
Debt Instrument [Line Items]                      
Share price       5.00us-gaap_SharePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
             
Series B Preferred Stock [Member] | Platinum [Member]                      
Debt Instrument [Line Items]                      
Shares converted         4,422us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
1,737.9us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
10,000us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
3,063us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
     
Convertible preferred stock, shares issuable upon conversion             32,700,000us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
       
Aggregate shares issued upon conversion             1,300,000navb_ConvertiblePreferredStockAggregateSharesIssuedasfees
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
       
Minimum gross cash proceeds from public offering of common stock for automatic conversion         10,000,000navb_MinimumGrossCashProceedsFromPublicOfferingOfCommonStockForAutomaticConversion
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
           
Series B Preferred Stock [Member] | Platinum Partners Value Arbitrage Fund [Member]                      
Debt Instrument [Line Items]                      
Stock issued during period                 1,376us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ dei_LegalEntityAxis
= navb_PlatinumPartnersValueArbitrageFundLpMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
918us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ dei_LegalEntityAxis
= navb_PlatinumPartnersValueArbitrageFundLpMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesBPreferredStockMember
 
Series C Preferred Stock [Member] | Bupp Investors [Member]                      
Debt Instrument [Line Items]                      
Shares converted             1,000us-gaap_ConversionOfStockSharesConverted1
/ dei_LegalEntityAxis
= navb_BuppInvestorsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
       
Convertible preferred stock, shares issuable upon conversion             3,226,000us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ dei_LegalEntityAxis
= navb_BuppInvestorsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesCPreferredStockMember
       
Common Stock [Member]                      
Debt Instrument [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
           
Common Stock [Member] | Platinum [Member]                      
Debt Instrument [Line Items]                      
Conversion of stock, shares issued         14,459,940us-gaap_ConversionOfStockSharesIssued1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
5,682,933us-gaap_ConversionOfStockSharesIssued1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
  10,016,010us-gaap_ConversionOfStockSharesIssued1
/ dei_LegalEntityAxis
= navb_PlatinumMontaurLifeSciencesLlcMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
     
Common Stock [Member] | Bupp Investors [Member]                      
Debt Instrument [Line Items]                      
Convertible preferred stock                     3,226,000navb_SharesIssuableUponConversion
/ dei_LegalEntityAxis
= navb_BuppInvestorsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Common Stock [Member] | Platinum Partners Value Arbitrage Fund [Member]                      
Debt Instrument [Line Items]                      
Shares exchanged                 4,499,520us-gaap_StockRepurchasedDuringPeriodShares
/ dei_LegalEntityAxis
= navb_PlatinumPartnersValueArbitrageFundLpMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
3,001,860us-gaap_StockRepurchasedDuringPeriodShares
/ dei_LegalEntityAxis
= navb_PlatinumPartnersValueArbitrageFundLpMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember