Amount pertaining to milestone payment on collaborative arrangement.

No definition available.

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

- Definition

Amount pertaining to regulatory milestone payment on collaborative arrangement.

+ References

No definition available.

+ Details

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

- Definition

Gross revenue from contract with customers excluding assessed tax.

+ References

No definition available.

+ Details

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Namespace Prefix:	nbrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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_DisaggregationOfRevenueLineItems
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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

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

- Details

Name:	srt_CounterpartyNameAxis=nbrv_SunovionPharmaceuticsCanadaInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_LicenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	srt_ProductOrServiceAxis=nbrv_ContingentConsiderationDeemedProbableToBeMetAndReceivedMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_ProductOrServiceAxis=nbrv_ResearchPremiumMember
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- Details

Name:	srt_ProductOrServiceAxis=nbrv_GovernmentGrantsMember
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Revenue (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
Revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Revenue accounted for under Topic 606		$ 1,291	$ 6,920	$ 2,567	$ 9,148
Product revenue, gross		8		400
Sunovion Pharmaceutics Canada, Inc. \| License Agreement
Revenue
Regulatory milestone payment received		500		500
Collaboration revenue
Revenue
Revenue accounted for under Topic 606		616	5,051	768	6,051
Collaboration revenue - Upfront payment
Revenue
Revenue accounted for under Topic 606		(47)	1,445	61	1,445
Product revenue, gross		8		406
Collaboration revenue - Upfront payment \| Sinovant Sciences, LTD \| License Agreement
Revenue
Revenue accounted for under Topic 606	$ 5,000				1,000
Collaboration revenue - Variable consideration
Revenue
Revenue accounted for under Topic 606		616	5,051	768	6,051
Collaboration revenue - Variable consideration \| Sinovant Sciences, LTD \| License Agreement
Revenue
Milestone payment received					5,000
Research premium
Revenue
Revenue accounted for under Topic 606		211	$ 424	802	1,168
Government grants
Revenue
Revenue accounted for under Topic 606		$ 511		$ 936	$ 484