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Subsequent Events -Narrative (Details) (USD $)
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3 Months Ended | 1 Months Ended | ||
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Mar. 31, 2015
day
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May 11, 2015
payment
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Mar. 31, 2014
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May 31, 2015
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| Oxford Finance, LLC | ||||
| Subsequent Event [Line Items] | ||||
| Debt face amount |
$ 30,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = navb_OxfordFinanceLLCMember |
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| Debt instrument, interest rate |
8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = navb_OxfordFinanceLLCMember |
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| Platinum Credit Facility | Line of Credit | ||||
| Subsequent Event [Line Items] | ||||
| Debt Instrument, Convertible, Stock Price, Consecutive Trading Days |
10us-gaap_DebtInstrumentConvertibleThresholdTradingDays / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = navb_PlatinumCreditFacilityMember |
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| Subsequent Event | Capital Royalty Group | ||||
| Subsequent Event [Line Items] | ||||
| Debt face amount |
50,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = navb_CapitalRoyaltyGroupMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Debt instrument, interest rate |
14.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = navb_CapitalRoyaltyGroupMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Number of payments |
24navb_DebtInstrumentNumberOfPayments / us-gaap_DebtInstrumentAxis = navb_CapitalRoyaltyGroupMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| End-of-term fee amount |
2,500,000navb_DebtInstrumentEndoftermFeeAmount / us-gaap_DebtInstrumentAxis = navb_CapitalRoyaltyGroupMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Subsequent Event | Oxford Finance, LLC | ||||
| Subsequent Event [Line Items] | ||||
| End-of-term fee amount |
2,400,000navb_DebtInstrumentEndoftermFeeAmount / us-gaap_DebtInstrumentAxis = navb_OxfordFinanceLLCMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Repayments of long-term debt |
31,600,000us-gaap_RepaymentsOfLongTermDebt / us-gaap_DebtInstrumentAxis = navb_OxfordFinanceLLCMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Early redemption fee amount |
300,000navb_DebtInstrumentEarlyRedemptionFeeAmount / us-gaap_DebtInstrumentAxis = navb_OxfordFinanceLLCMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Subsequent Event | Platinum Credit Facility | Line of Credit | ||||
| Subsequent Event [Line Items] | ||||
| Proceeds from lines of credit |
1,500,000us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = navb_PlatinumCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Unused borrowing capacity, Amount |
$ 7,700,000us-gaap_LinesOfCreditCurrent / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = navb_PlatinumCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
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| Share Price |
$ 2.53us-gaap_SharePrice / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = navb_PlatinumCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
| X | ||||||||||
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- Definition
Debt Instrument, Early Redemption Fee, Amount No definition available.
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| X | ||||||||||
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- Definition
Debt Instrument, End-of-term, Fee Amount No definition available.
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| X | ||||||||||
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- Definition
Debt Instrument, Number Of Payments No definition available.
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| X | ||||||||||
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- Definition
Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. No definition available.
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- Definition
Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Price of a single share of a number of saleable stocks of a company. No definition available.
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