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Commitments and Contingencies (Additional Information) (Details)	6 Months Ended
	Jun. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Royalty term	10 years

X

- Definition

Royalty term

+ References

No definition available.

+ Details

Name:	inab_RoyaltyTerm
Namespace Prefix:	inab_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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