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Retirement obligations - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2024
Retirement Obligation [Abstract] |
Payable, period | 5 years

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- Definition Defined Benefit Obligation, Payable, Period + References No definition available. + Details
Name: | nbx_DefinedBenefitObligationPayablePeriod
Namespace Prefix: | nbx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Retirement Obligation + References No definition available. + Details
Name: | nbx_RetirementObligationAbstract
Namespace Prefix: | nbx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration