Lease Maturity Term

No definition available.

Name:	mgtx_LeaseMaturityTerm
Namespace Prefix:	mgtx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of short term commitments for office space that are on a month-to-month basis.

+ References

No definition available.

+ Details

Name:	mgtx_OperatingLeaseNumberOfMonthToMonthLeases
Namespace Prefix:	mgtx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977

+ Details

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of short-term lease commitment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918705-209980

+ Details

Name:	us-gaap_ShortTermLeaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Leases - Additional Information (Details)	3 Months Ended		6 Months Ended
Leases - Additional Information (Details)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) lease	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease rent expenses	$ 901,042	$ 102,152	$ 1,660,415	$ 189,409
Short term lease commitments monthly amount	$ 56,000		$ 56,000
Number of month-to-month leases \| lease			2
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lease term			3 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lease term			108 years