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Significant accounting policies, Segmental reporting (Details)	6 Months Ended
	Jun. 30, 2023 Segment
Segment reporting [Abstract]
Number of operating segment	1

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- References

No definition available.

+ Details

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X

- Definition

Number of operating segments of an entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	imcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration