Name:	nbrv_AmountOfOptionToPurchaseEquitySecuritiesByLender
Namespace Prefix:	nbrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The fee for borrowing money under the debt instrument due at maturity, as a percentage of the aggregate amount of advances under the Loan Agreement.

No definition available.

Name:	nbrv_DebtInstrumentFeeDueAtMaturityAsPercentageOfAggregateAmountOfAdvances
Namespace Prefix:	nbrv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Prepayment penalty, as a percentage of principal amount being repaid.

No definition available.

Name:	nbrv_DebtInstrumentPrepaymentPenaltyAsPercentageOfPrincipalAmountRepaid
Namespace Prefix:	nbrv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Percentage points adjustment to the variable rate of the debt instrument.

No definition available.

Name:	nbrv_DebtInstrumentVariableRateAdjustment
Namespace Prefix:	nbrv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount, before accumulated amortization, of the initial fee due to the Lender.

No definition available.

Name:	nbrv_DeferredFinanceCostsGrossInitialFee
Namespace Prefix:	nbrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount, before accumulated amortization, of loan origination costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

No definition available.

Name:	nbrv_DeferredFinanceCostsGrossLoanOriginationCosts
Namespace Prefix:	nbrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the number of additional term loan advances.

No definition available.

Name:	nbrv_NumberOfAdditionalTermLoanAdvances
Namespace Prefix:	nbrv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The threshold amount in excess of which the Company may elect to prepay advances outstanding.

No definition available.

Name:	nbrv_ThresholdAmountInExcessOfWhichPrepaymentsMayBeMade
Namespace Prefix:	nbrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

Name:	us-gaap_TypeOfArrangementAxis=nbrv_LoanAndSecurityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LongtermDebtTypeAxis=nbrv_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_InitialAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_AdditionalTermLoanAdvancesTranchesTwoThroughSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_TrancheTwoAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_TrancheThreeAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_TrancheFourAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_TrancheFiveAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_TrancheSixAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_TrancheSevenAdvanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_PrepaymentDuringFirstTwelveMonthsFollowingInitialClosingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=nbrv_PrepaymentAfterFirstTwelveMonthsFollowingInitialClosingAndBeforeTwentyFourMonthsFollowingInitialClosingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: