Commitments and Contingencies - YourChoice and Pfizer License Agreement (Details) $ in Thousands	9 Months Ended
Sep. 30, 2023 USD ($)
Commitments and Contingencies
Percentage of royalty payments	2.50%
Sales based milestone payment	$ 0
Tier One Net Sales Milestone [Member]
Commitments and Contingencies
Sales based milestone payment	1,000
Payments for specified global net sales milestones	500,000
Tier Two Net Sales Milestone [Member]
Commitments and Contingencies
Sales based milestone payment	1,500
Payments for specified global net sales milestones	1,000,000
Tier Three Net Sales Milestone [Member]
Commitments and Contingencies
Sales based milestone payment	4,000
Payments for specified global net sales milestones	3,000,000
Tier Four Net Sales Milestone [Member]
Commitments and Contingencies
Sales based milestone payment	8,000
Payments for specified global net sales milestones	5,000,000
YourChoice \| License Agreements
Commitments and Contingencies
Royalty and milestone payment due	$ 19,500
Percentage of royalty payments	0.50%
YourChoice \| License Agreements \| Milestone Payments
Commitments and Contingencies
Royalty and milestone payment due	$ 5,000
Pfizer, Inc. \| License Agreements
Commitments and Contingencies
Number of years after the first commercial sale	five
Liabilities recorded	$ 0
Pfizer, Inc. \| License Agreements \| Milestone Payments \| Maximum
Commitments and Contingencies
Potential payments upon achievement of certain milestones	37,000

Represents a contingent liability to make payments if certain conditions are achieved.

No definition available.

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Refers to number of years after the first sale occurs.

+ References

No definition available.

+ Details

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Namespace Prefix:	nrbo_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Refers to payments for specified global net sales milestones.

+ References

No definition available.

+ Details

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Namespace Prefix:	nrbo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Royalty percent of annual worldwide income.

+ References

No definition available.

+ Details

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Namespace Prefix:	nrbo_
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Balance Type:	na
Period Type:	instant

- Definition

The amount of royalty and milestone payment due under the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	nrbo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of mile stone payments to be made based on sales

+ References

No definition available.

+ Details

Name:	nrbo_SalesBasedMilestonePayment
Namespace Prefix:	nrbo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 8
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483467/210-10-45-8

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479402/808-10-50-1

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Details

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- Details

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- Details

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- Details

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- Details

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