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Defined Contribution Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan Disclosure [Line Items]
Minimum age of employee to cover under the plan	21 years
Employer matches vesting period	6 years
Percentage of employee contribution vested on their contribution	100.00%
Amount of discretionary matching contributions on employee deferrals	$ 0.0	$ 0.0
Maximum
Defined Contribution Plan Disclosure [Line Items]
Employee compensation deferred percentage	90.00%

X

- Definition

Percentage of employee contributions may be deferred to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	nrbo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Employee eligibility age criteria under defined contribution plan.

+ References

No definition available.

+ Details

Name:	nrbo_DefinedContributionPlanEmployeeEligibilityAge
Namespace Prefix:	nrbo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period which the employer contribution will be vested under defined contribution plan, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	nrbo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of employee contribution vested on contribution made by employee.

+ References

No definition available.

+ Details

Name:	nrbo_EmployeeCompensationVestingPercentageOnContribution
Namespace Prefix:	nrbo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

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

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: