Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Liquidity (Narrative) (Details)

v3.5.0.2

Liquidity (Narrative) (Details) - USD ($)		6 Months Ended	12 Months Ended
Liquidity (Narrative) (Details) - USD ($)	Jun. 22, 2016	Jun. 30, 2016	Dec. 31, 2015	Aug. 01, 2016	Jun. 28, 2016	Apr. 07, 2016	Jun. 30, 2015	May 15, 2015	Dec. 31, 2014
Liquidity [Line Items]
Cash		$ 1,155,641	$ 7,166,260				$ 15,790,235		$ 5,479,006
Notes payable		61,200,000
Cardinal Health [Member]
Liquidity [Line Items]
Percentage of receivables due from customers					50.00%
Remaining percentage of receivables due from customers held in escrow account					50.00%
Subsequent Event [Member] \| Cardinal Health [Member]
Liquidity [Line Items]
Percentage of receivables due from customers				75.00%
Remaining percentage of receivables due from customers held in escrow account				25.00%
Percentage of receivables due from customers after reaching escrow account limit				100.00%
Subsequent Event [Member] \| Cardinal Health [Member] \| Maximum [Member]
Liquidity [Line Items]
Escrow account threshold target amount				$ 1,000,000
Capital Royalty Partners II LP [Member]
Liquidity [Line Items]
Liquidity minimum		5,000,000						$ 5,000,000
Minimum sales revenue target		$ 22,500,000	$ 11,000,000
Debt instrument default interest rate percentage		18.00%				18.00%
Debt instrument, interest rate		14.00%
Claims made from primary bank accounts on default	$ 4,100,000
Cash adjusted to various fees on default	3,900,000
Cash adjusted to principal balance of debt on default	$ 189,000
Notes payable		$ 51,700,000
Platinum Credit Facility [Member]
Liquidity [Line Items]
Notes payable		9,100,000
Remaining borrowing capacity		27,300,000
Unused additional borrowing capacity		$ 15,000,000

- Definition

Debt instrument covenant compliance liquidity minimum.

+ References

No definition available.

+ Details

Name:	navb_DebtInstrumentCovenantComplianceLiquidityMinimum
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument covenant compliance sales revenue minimum.

+ References

No definition available.

+ Details

Name:	navb_DebtInstrumentCovenantComplianceSalesRevenueMinimum
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt instrument default interest rate percentage.

+ References

No definition available.

+ Details

Name:	navb_DebtInstrumentDefaultInterestRatePercentage
Namespace Prefix:	navb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Escrow account threshold target amount.

+ References

No definition available.

+ Details

Name:	navb_EscrowAccountThresholdTargetAmount
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line of credit facility additional borrowing capacity.

+ References

No definition available.

+ Details

Name:	navb_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Liquidity.

+ References

No definition available.

+ Details

Name:	navb_LiquidityLineItems
Namespace Prefix:	navb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Payments made on claims of default.

+ References

No definition available.

+ Details

Name:	navb_PaymentsMadeOnClaimsOfDefault
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments to principal balance of debt on claims of default.

+ References

No definition available.

+ Details

Name:	navb_PaymentsToPrincipalBalanceOfDebtOnClaimsOfDefault
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments to various fees on claims of default.

+ References

No definition available.

+ Details

Name:	navb_PaymentsToVariousFeesOnClaimsOfDefault
Namespace Prefix:	navb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of receivables due from customers payable to parent after reaching escrow account limit.

+ References

No definition available.

+ Details

Name:	navb_PercentageOfReceivablesDueFromCustomersPayableToParentAfterReachingEscrowAccountLimit
Namespace Prefix:	navb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of receivables due from customers payable to parent under court order.

+ References

No definition available.

+ Details

Name:	navb_PercentageOfReceivablesDueFromCustomersPayableToParentUnderCourtOrder
Namespace Prefix:	navb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Remaining percentage of receivables due from customers payable to an escrow account under court order.

+ References

No definition available.

+ Details

Name:	navb_RemainingPercentageOfReceivablesDueFromCustomersPayableToEscrowAccountUnderCourtOrder
Namespace Prefix:	navb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_Cash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_NotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_MajorCustomersAxis=navb_CardinalHealthIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=navb_CapitalRoyaltyGroupTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=navb_PlatinumCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: