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v3.25.1

GENERAL AND ADMINISTRATIVE EXPENSES (Tables) | 12 Months Ended
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Dec. 31, 2024
Selling, general and administrative expense [abstract] |
Disclosure of detailed information about general and administrative expense [Table Text Block] |
|  | Year ended |
|  | December 31, |  |  |  | December 31, |
|  | 2024 |  |  |  | 2023 |
Compensation and benefits | $ | 2,807 |  |  | $ | 2,469 |
Corporate administration |  | 1,306 |  |  |  | 1,126 |
Professional fees |  | 901 |  |  |  | 1,123 |
Listing and filing fees |  | 203 |  |  |  | 212 |
Total general and administrative expenses | $ | 5,217 |  |  | $ | 4,930 |

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
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- Definition Tabular disclosure of the components of general and administrative expense. + References No definition available. + Details
Name: | mta_DisclosureOfDetailedInformationAboutGeneralAndAdministrativeExpenseExplanatory
Namespace Prefix: | mta_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration