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LOANS PAYABLE - Disclosure of detailed information about fair value of derivative loan liability assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loan Payable [Abstract]
Maturity date	May 10, 2027	May 10, 2027
Risk free interest rate	2.72%	3.66%
Share price	$ 3.62	$ 4.05
Expected volatility	54.00%	52.00%
Dividend yield	0.00%	0.00%
Conversion Price	$ 6	$ 6

X

- Definition

Represent the conversion price.

+ References

No definition available.

+ Details

Name:	mta_ConversionPrice
Namespace Prefix:	mta_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	mta_ExpectedDividendYield
Namespace Prefix:	mta_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of expected stock price volatility.

+ References

No definition available.

+ Details

Name:	mta_ExpectedStockPriceVolatility
Namespace Prefix:	mta_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Represent the maturity date.

+ References

No definition available.

+ Details

Name:	mta_MaturityDate
Namespace Prefix:	mta_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of risk free interest rate.

+ References

No definition available.

+ Details

Name:	mta_RiskFreeInterestRate
Namespace Prefix:	mta_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the share prices.

+ References

No definition available.

+ Details

Name:	mta_SharePrices
Namespace Prefix:	mta_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration