The maximum possible contingent consideration under a licensing agreement.

No definition available.

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

- Definition

Amount pertaining to milestone payment on collaborative arrangement.

+ References

No definition available.

+ Details

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

- Definition

Notice period for termination of license agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	nbrv_NoticePeriodForTerminationOfLicenseAgreement
Namespace Prefix:	nbrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of deliverables or units of accounting at inception.

+ References

No definition available.

+ Details

Name:	nbrv_NumberOfDeliverables
Namespace Prefix:	nbrv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=nbrv_SinovantSciencesLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	srt_ProductOrServiceAxis=nbrv_LicenseInitialPaymentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Sinovant License Agreement (Details) $ in Thousands	1 Months Ended		3 Months Ended								12 Months Ended
Sinovant License Agreement (Details) $ in Thousands	Feb. 28, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) item	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
License Agreement
Revenues			$ 797	$ 461	$ 847	$ 7,551	$ 1,122	$ 1,468	$ 1,051	$ 1,678	$ 9,656	$ 5,319	$ 6,482
Sinovant Sciences, LTD \| License Agreement
License Agreement
Notice period for termination of agreement											180 days
Number of deliverables \| item			2								2
Sinovant Sciences, LTD \| License Agreement \| Achievement of certain regulatory and commercial milestones
License Agreement
Maximum contingent milestone payment			$ 91,500								$ 91,500
Sinovant Sciences, LTD \| License Agreement \| Subsequent regulatory approval
License Agreement
Maximum contingent milestone payment			$ 4,000								$ 4,000
Sinovant Sciences, LTD \| License Agreement \| Clinical trial application submission
License Agreement
Milestone payment received	$ 1,500
Collaboration revenue - Upfront payment \| Sinovant Sciences, LTD \| License Agreement
License Agreement
Revenues		$ 5,000