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v3.25.1

LOANS PAYABLE (Narrative) (Details) $ / shares in Units, $ in Thousands, $ in Millions |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 13, 2025 CAD ($) $ / shares shares | Dec. 01, 2023 CAD ($) $ / shares | Jul. 07, 2023 USD ($) | Jan. 31, 2025 CAD ($) $ / shares | Apr. 30, 2024 | Feb. 20, 2024 CAD ($) $ / shares shares | May 31, 2023 CAD ($) | May 31, 2023 USD ($) | May 19, 2023 | Dec. 31, 2022 CAD ($) $ / shares | Aug. 31, 2022 CAD ($) $ / shares | Aug. 31, 2022 USD ($) | Oct. 31, 2021 USD ($) | Dec. 31, 2024 CAD ($) $ / shares | Dec. 31, 2024 USD ($) shares | Dec. 31, 2023 USD ($) shares | Jan. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Apr. 01, 2024 USD ($) | Dec. 01, 2023 USD ($) | Nov. 30, 2023 CAD ($) | May 31, 2023 USD ($) | Apr. 30, 2023 CAD ($) | Mar. 31, 2023 USD ($)
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finance charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 339 | $ 206 |  |  |  |  |  |  |  |
Loss on extinguishment of loan payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 2,355 |  |  |  |  |  |  |  |
Risk free interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.72% | 3.66% |  |  |  |  |  |  |  |
Dividend yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 54.00% | 52.00% |  |  |  |  |  |  |  |
Loan Amendment [Member] | Third Drawdown [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion on loan payable (shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 545,702 |  |  |  |  |  |  |  |
A&R Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion on loan payable (shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 429,800 |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | Amended Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend yield |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected life in years |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | Amended Facility [Member] | Second Amendment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate on liability |  |  |  |  |  |  |  |  | 14.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of loan payable |  |  |  |  |  |  |  | $ 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction costs |  |  |  |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative loan liability fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400 |  |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,700 |  |
Face value of the debt |  |  |  |  |  |  | $ 4.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,100 |  |
Beedie Capital ("Beedie") [Member] | Loan Amendment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan extension fee |  |  |  |  |  |  |  |  |  | $ 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 7.34 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining undrawn available from original loan facility |  |  |  |  |  |  |  |  |  | $ 12.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | Loan Amendment [Member] | First Amendment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan extension fee |  |  |  |  |  |  |  |  |  |  | $ 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 7.34 |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on extension of loan payable |  |  |  |  |  |  |  |  |  |  |  | $ 300 |  |  |  |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | Loan Amendment [Member] | Second Amendment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible loan facility |  |  |  |  |  |  | $ 25.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20.0 |
Effective interest rate on liability |  |  |  |  | 8.00% |  | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Addition to loan facility |  |  |  |  |  |  | $ 5.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | Loan Amendment [Member] | Third Drawdown [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 14.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions to loan payable |  |  |  |  |  |  |  |  |  | $ 5.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | Loan Amendment [Member] | Fourth Drawdown [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 11.16 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions to loan payable |  |  |  |  |  |  |  |  |  | $ 3.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | A&R Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible loan facility |  | $ 4.2 |  | $ 30.9 |  |  |  |  |  |  |  |  |  | $ 30.9 |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares | $ 3.64 | $ 6 |  | $ 6 |  | $ 3.49 |  |  |  |  |  |  |  | $ 6 |  |  |  |  |  |  |  |  |  |
Effective interest rate on liability |  | 14.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of loan facility, converted amount | $ 1.5 |  |  |  |  | $ 1.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional draw down |  | $ 12.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of derivative loan liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 600 |  | $ 100 |  | $ 900 |  |  |  |
Conversion of loan facility, shares issued | shares | 412,088 |  |  |  |  | 429,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finance charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 | $ 200 |  |  |  |  |  |  |  |
Derivative loan liability fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,200 |  |  |  |
Face value of the debt |  | 16.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,100 |  |  |  |
Principal amount of loan |  | 50.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25.0 |  |  |
Accrued interest amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.5 |  |  |  |  |  |  |  |  |  |
Accrued fees amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.8 |  |  |  |  |  |  |  |  |  |
Amendment fee |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding principal amount |  |  |  | $ 16.4 |  |  |  |  |  |  |  |  |  | $ 16.4 |  |  |  |  |  |  |  |  |  |
Principal repayment |  |  |  | $ 2.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in accrued interest and accrued fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Beedie Capital ("Beedie") [Member] | A&R Loan Facility [Member] | Fifth Drawdown [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible loan facility |  | $ 4.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  | $ 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions to loan payable |  | $ 12.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional draw down |  | 12.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of loan |  | 16.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nova Royalty Corp [Member] | A&R Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued interest amount |  | 2.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued fees amount |  | $ 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Paid-in-kind interest rate |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |
Castle Mountain Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Loans Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated rate percentage |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  | 12.00%
Additions to loan payable |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000 |  |  |  |  |  |  |  |  |  |  |
Accrued interest amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700 |  |  |  |  | $ 300
Principal repayment |  |  | $ 4,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of interest recognised as a liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Expected life in years + References No definition available. + Details
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- Definition The percentage of expected stock price volatility. + References No definition available. + Details
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Balance Type: | na
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- Definition Amount of face value of the debt. + References No definition available. + Details
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Namespace Prefix: | mta_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Represent the fair value of derivative loan liabilities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Represents amount of gain loss on extension of loan payable. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Number of shares issued for conversion on loan payable. + References No definition available. + Details
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- Definition Loan extension fee + References No definition available. + Details
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- Definition Amount of outstanding principal amount. + References No definition available. + Details
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Namespace Prefix: | mta_
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- Definition Pecentage of paid in kind interests. + References No definition available. + Details
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- Definition Amount of ?principal loan. + References No definition available. + Details
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- Definition Amount of reduction in accrued interest and accrued fees. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The cash outflow to settle borrowings, classified as investing activities. [Refer: Borrowings] + References No definition available. + Details
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- Definition The percentage of risk free interest rate. + References No definition available. + Details
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Namespace Prefix: | mta_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Period Type: | duration

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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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