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Condensed Statements of Operations (Parenthetical)	Jun. 30, 2020 shares
Income Statement [Abstract]
Ordinary shares subject to redeemption	5,148,985

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- References

No definition available.

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Name:	nbac_OrdinarySharesSubjectToRedeemption
Namespace Prefix:	nbac_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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No definition available.

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