Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v2.4.1.9
Subsequent Events (Details) (USD $)
12 Months Ended 0 Months Ended 3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Mar. 13, 2015
Mar. 16, 2015
Mar. 16, 2015
Dec. 31, 2014
Sep. 30, 2013
Apr. 30, 2013
Feb. 28, 2013
Mar. 12, 2015
employee
Subsequent Event [Line Items]                    
Preferred stock authorized 5,000,000us-gaap_PreferredStockSharesAuthorized         5,000,000us-gaap_PreferredStockSharesAuthorized        
Purchase price per share $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare         $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare        
Common stock value $ 135,919us-gaap_CommonStockValue         $ 150,200us-gaap_CommonStockValue        
Price per share             $ 2.84us-gaap_SharesIssuedPricePerShare $ 2.43us-gaap_SharesIssuedPricePerShare $ 3.10us-gaap_SharesIssuedPricePerShare  
Platinum Credit Facility [Member]                    
Subsequent Event [Line Items]                    
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
               
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Number of member states       28us-gaap_NumberOfStatesInWhichEntityOperates
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
28us-gaap_NumberOfStatesInWhichEntityOperates
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Proceeds from issuance of convertible preferred stock and warrants     500,000navb_ProceedsfromIssuanceofConvertiblePreferredStockandWarrants
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Percentage of preferred stock and warrants committed to be purchased by Dr. Goldberg     40.00%navb_ConvertiblePreferredStockPercentofSharesReserved
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Common stock as percentage of common equity     1.00%navb_CommonStockasPercentageofCommonEquity
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Proceeds from issuance initial public offering     50,000,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Common stock value     50,000us-gaap_CommonStockValue
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Weighted average price per share     80.00%navb_WeightedAveragePriceCommonStockPercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Price per share     $ 3.00us-gaap_SharesIssuedPricePerShare
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Convertible preferred stock value per share     $ 58,320navb_ConvertiblePreferredStockNonredeemableorRedeemableIssuerOptionValuePerShare
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Subsequent Event [Member] | Staff Member [Member]                    
Subsequent Event [Line Items]                    
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date                   7us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDate
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= navb_StaffMemberMember
Subsequent Event [Member] | Executive Officer [Member]                    
Subsequent Event [Line Items]                    
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date                   3us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDate
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember
Subsequent Event [Member] | Licensing Agreements [Member]                    
Subsequent Event [Line Items]                    
Payment for sublicense agreement       2,000,000us-gaap_LicensesRevenue
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
           
Additional payments for sublicense agreement       5,000,000navb_LicensesRevenueAdditional
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
           
Subsequent Event [Member] | Platinum Credit Facility [Member]                    
Subsequent Event [Line Items]                    
Proceeds from lines of credit         $ 3,000,000us-gaap_ProceedsFromLinesOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Subsequent Event [Member] | MT Preferred Stock [Member]                    
Subsequent Event [Line Items]                    
Preferred stock authorized     50us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= navb_MTSeriesAConvertiblePreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Purchase price per share     $ 50,000us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= navb_MTSeriesAConvertiblePreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Preferred stock issued     10us-gaap_PreferredStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= navb_MTSeriesAConvertiblePreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Subsequent Event [Member] | Common Stock [Member]                    
Subsequent Event [Line Items]                    
Shares authorized upon exercise of warrants     1,500navb_CommonStockSharesAuthorizedUponExerciseofWarrants
/ us-gaap_StatementClassOfStockAxis
= navb_MTCommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
             
Common Stock, Shares Issuable Upon Exercise of Warrants     300navb_CommonStockSharesIssuableUponExerciseofWarrants
/ us-gaap_StatementClassOfStockAxis
= navb_MTCommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember