XML 66 R45.htm IDEA: XBRL DOCUMENT v3.25.1

LOANS PAYABLE - Disclosure of detailed information about loans payable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loan Payable [Line Items]
Opening balance	$ 13,725
Interest expense	1,977	$ 1,170
Interest payments	(58)	(809)
Ending balance	12,625	13,725
Loans Payable [Member]
Loan Payable [Line Items]
Opening balance	14,286	10,585
Additions		11,064
Conversion	(1,109)	(2,737)
Extinguishment of loan facility		233
Modification of loan facility		(311)
Interest expense	1,771	1,019
Interest payments	(58)	(809)
Principal repayment	(660)	(4,340)
Fair value adjustment of derivative portion	(493)	(673)
Foreign exchange adjustments	(1,044)	255
Ending balance	12,693	14,286
Loans Payable [Member] | A&R Loan Facility Debt Portion [Member]
Loan Payable [Line Items]
Opening balance	13,027	5,335
Additions		10,357
Conversion	(1,109)	(2,737)
Extinguishment of loan facility		(195)
Modification of loan facility		(410)
Interest expense	1,751	771
Interest payments	0	(349)
Principal repayment	0	0
Fair value adjustment of derivative portion	0	0
Foreign exchange adjustments	(1,044)	255
Ending balance	12,625	13,027
Loans Payable [Member] | A&R Loan Facility Derivative Portion [Member]
Loan Payable [Line Items]
Opening balance	561	0
Additions		707
Conversion	0	0
Extinguishment of loan facility		428
Modification of loan facility		99
Interest expense	0	0
Interest payments	0	0
Principal repayment	0	0
Fair value adjustment of derivative portion	(493)	(673)
Foreign exchange adjustments	0	0
Ending balance	68	561
Loans Payable [Member] | Castle Mountain Loan [Member]
Loan Payable [Line Items]
Opening balance	698	5,250
Additions		0
Conversion	0	0
Extinguishment of loan facility		0
Modification of loan facility		0
Interest expense	20	248
Interest payments	(58)	(460)
Principal repayment	(660)	(4,340)
Fair value adjustment of derivative portion	0	0
Foreign exchange adjustments	0	0
Ending balance	$ 0	$ 698

X

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_Borrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of expense arising from interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2024-01-01
-Paragraph 28
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_e&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph B13
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B13_f&doctype=Appendix&subtype=B
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2024-01-01
-Paragraph 23
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23_d&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_InterestExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for interest paid, classified as financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 31
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_31&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_InterestPaidClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow for repayments of current borrowings. [Refer: Current borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2024-01-01
-Paragraph 17
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_RepaymentsOfCurrentBorrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents amount of additions to loan payable.

+ References

No definition available.

+ Details

Name:	mta_AdditionsToLoanPayable
Namespace Prefix:	mta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents conversion of loans payable during the period.

+ References

No definition available.

+ Details

Name:	mta_ConversionLoansPayable
Namespace Prefix:	mta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents amount of currency translation adjustments related to borrowing.

+ References

No definition available.

+ Details

Name:	mta_CurrencyTranslationAdjustmentsRelatedToBorrowings
Namespace Prefix:	mta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of Extinguishment of loan facility.

+ References

No definition available.

+ Details

Name:	mta_ExtinguishmentOfLoanFacility
Namespace Prefix:	mta_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of Fair value adjustment of derivative portion.

+ References

No definition available.

+ Details

Name:	mta_FairValueAdjustmentOfDerivativePortion
Namespace Prefix:	mta_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	mta_LoanPayableLineItems
Namespace Prefix:	mta_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of Modification of loan facility.

+ References

No definition available.

+ Details

Name:	mta_ModificationOfLoanFacility
Namespace Prefix:	mta_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=mta_LoansPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mta_LoanPayableAxis=mta_AAndRLoanFacilityDebtPortionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mta_LoanPayableAxis=mta_AAndRLoanFacilityDerivativePortionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mta_LoanPayableAxis=mta_CastleMountainLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: