n/a

No definition available.

Name:	nbrv_AdjustmentsToPriorPeriodAccrualsAbstract
Namespace Prefix:	nbrv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of chargebacks and cash discounts accrued during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

The amount of gross to net accrual adjustments incurred during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

The amount of gross to net adjustments accrued during the reporting period.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

Name:	nbrv_GrossToNetAdjustmentsAbstract
Namespace Prefix:	nbrv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of Medicaid and Medicare rebates accrued during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

The amount of other returns, rebates, discounts and adjustments accrued during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

Percentage of inventory held with specialty distributors.

+ References

No definition available.

+ Details

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

- Definition

The amount of return reserve adjustments incurred during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

The amount of revenue from contract with customers before return reserves and after gross to net adjustments during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

Gross revenue from contract with customers excluding assessed tax.

+ References

No definition available.

+ Details

Name:	nbrv_RevenueFromContractWithCustomerExcludingAssessedTaxGross
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

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

- Details

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

- Details

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

Revenue - Summary of Gross-To-Net ("GTN") Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Product revenue, gross	$ 8		$ 400
Adjustments To prior period accruals
Product revenue, net	1,291	$ 6,920	2,567	$ 9,148
Collaboration revenue - Upfront payment
Disaggregation of Revenue [Line Items]
Product revenue, gross	8		406
GTN accruals
Chargebacks and cash discounts			13
Medicaid and Medicare rebates	1		47
Other returns, rebates, discounts and adjustments	2		94
Total GTN accruals	3		154
Product revenue	5		252
Adjustments To prior period accruals
Returns reserve	(52)		(391)
GTN accrual adjustments			200
Product revenue, net	$ (47)	$ 1,445	$ 61	$ 1,445
XENLETA
Adjustments To prior period accruals
Percentage of inventory held			50.00%