XML 141 R126.htm IDEA: XBRL DOCUMENT
v3.23.4

Acquisition of subsidiary - additional information (Details) $ in Thousands |  | 6 Months Ended
--- | --- | ---
Jun. 16, 2023 USD ($) payment | Jun. 16, 2023 USD ($) payment | Jun. 16, 2023 USD ($) payment $ / lb | Jun. 16, 2023 USD ($) payment D | Jun. 16, 2023 USD ($) payment $ / t | Jun. 30, 2023 USD ($) item $ / lb
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Deferred Consideration |  |  |  |  |  | $ 75,000
Number of contingent payments | item |  |  |  |  |  | 2
Copper contingent consideration payment amount |  |  |  |  |  | $ 75,000
Trigger price | $ / lb |  |  |  |  |  | 4.25
18-Month |  |  |  |  |  | 18 months
24-Month |  |  |  |  |  | 24 months
Trigger price | $ / lb |  |  |  |  |  | 4.50
CMPL |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Deferred Consideration | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 |
Percentage of proceeds of equity raise that can be used for deferred consideration | 50 | 50 | 50 | 50 | 50 |
Ordinary shares issued at a discount |  | 30.00% |  |  |  |
Trading day period | D |  |  |  | 20 |  |
Copper contingent consideration | $ 150,000 | $ 150,000 | $ 150,000 | $ 150,000 | $ 150,000 |
Number of contingent payments | payment | 2 | 2 | 2 | 2 | 2 |
Copper contingent consideration payment amount | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 |
Trigger price |  |  | 4.25 |  | 9,370 |
18-Month | 18 months |  |  |  |  |
24-Month | 24 months |  |  |  |  |
Trigger price |  |  | 4.50 |  | 9,920 |
Fair value of contingent copper consideration | $ 97,200 | $ 97,200 | $ 97,200 | $ 97,200 | $ 97,200 |
Royalty percentage | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
Royalty deed | $ 43,130 | $ 43,130 | $ 43,130 | $ 43,130 | $ 43,130 |
Effective interest rate | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% |
CMPL | Minimum | 3-Month SOFR |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Interest rate margin | 8 | 8 | 8 | 8 | 8 |
CMPL | Maximum | 3-Month SOFR |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Interest rate margin | 12 | 12 | 12 | 12 | 12 |

X
- Definition The amount, at acquisition date, of contingent consideration arrangements recognised as consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2023-01-01 -Paragraph B64 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2023-en-r&anchor=para_B64_g_i&doctype=Appendix&subtype=B -URIDate 2023-03-23 + Details
Name: | ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfBusinessCombinationsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | mtal_BorrowingAdjustmentToInterestRateBasis
Namespace Prefix: | mtal_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The 18-month trigger price on the London Metal Exchange (LME) for the contingent consideration. + References No definition available. + Details
Name: | mtal_ContingentConsiderationLondonMetalExchangeTriggerPriceRollingEighteenMonthPeriod
Namespace Prefix: | mtal_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The 18-month trigger price on the London Metal Exchange (LME) for the contingent consideration. + References No definition available. + Details
Name: | mtal_ContingentConsiderationLondonMetalExchangeTriggerPriceRollingTwentyFourMonthPeriod
Namespace Prefix: | mtal_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The first contingent consideration trigger price period. + References No definition available. + Details
Name: | mtal_ContingentConsiderationTriggerPricePeriodOne
Namespace Prefix: | mtal_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The second contingent consideration trigger price period. + References No definition available. + Details
Name: | mtal_ContingentConsiderationTriggerPricePeriodTwo
Namespace Prefix: | mtal_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discount rate used for valuing contingent liabilities recognised in a business combination. + References No definition available. + Details
Name: | mtal_ContingentLiabilitiesRecognisedInBusinessCombinationDiscountRate
Namespace Prefix: | mtal_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount, at acquisition date, of copper contingent consideration arrangements recognised as consideration transferred in a business combination. + References No definition available. + Details
Name: | mtal_CopperContingentConsideration
Namespace Prefix: | mtal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of copper contingent consideration payments. + References No definition available. + Details
Name: | mtal_CopperContingentConsiderationPaymentAmount
Namespace Prefix: | mtal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The fair value, at acquisition date, of deferred consideration as consideration transferred in a business combination. + References No definition available. + Details
Name: | mtal_DeferredConsideration
Namespace Prefix: | mtal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage of equity raise that can be used for deferred consideration in a business combination. + References No definition available. + Details
Name: | mtal_DeferredConsiderationPercentageOfEquityRaiseThatCanBeUsed
Namespace Prefix: | mtal_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of specified trading days volume weighted average price considered for issue of shares at discount for settlement of deferred consideration. + References No definition available. + Details
Name: | mtal_DeferredConsiderationSettlementInSharesVolumeWeightedAveragePriceTradingDays
Namespace Prefix: | mtal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of contingent consideration payments. + References No definition available. + Details
Name: | mtal_NumberOfContingentPayments
Namespace Prefix: | mtal_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percent of discount on ordinary shares to be issued for settlement of deferred consideration. + References No definition available. + Details
Name: | mtal_PercentOfDiscountOnOrdinarySharesForDeferredConsiderationSettlement
Namespace Prefix: | mtal_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value, at acquisition date, of royalty deed as consideration transferred in a business combination. + References No definition available. + Details
Name: | mtal_RoyaltyDeed
Namespace Prefix: | mtal_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The royalty payment percentage. + References No definition available. + Details
Name: | mtal_RoyaltyPercentage
Namespace Prefix: | mtal_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=mtal_CmplMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=mtal_SecuredOvernightFinancingRateSofrOvernightIndexSwapRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |