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Commitments and Contingencies (Details)	Mar. 31, 2025
Commitments and Contingencies
Number of new material commitments	0

X

- Definition

Number of new material commitments entered into during the period.

+ References

No definition available.

+ Details

Name:	mgtx_NumberOfNewMaterialCommitments
Namespace Prefix:	mgtx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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