The number of common stock shares cancelled during the period.

No definition available.

Name:	mcaau_CommonStockSharesCancelled
Namespace Prefix:	mcaau_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of ordinary shares transferred by sponsor to the other parties.

+ References

No definition available.

+ Details

Name:	mcaau_CommonStockSharesTransferred
Namespace Prefix:	mcaau_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of information pertaining to maximum number of shares subject to forfeiture.

+ References

No definition available.

+ Details

Name:	mcaau_MaximumNumberOfSharesSubjectToForfeiture
Namespace Prefix:	mcaau_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares owned by the founders subject to forfeiture if the underwriter overallotment option is not exercised in the proposed public offering.

+ References

No definition available.

+ Details

Name:	mcaau_NumberOfSharesSubjectToForfeiture
Namespace Prefix:	mcaau_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The period after which the shares are transferred after business combination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	mcaau_PeriodToTransferSharesAfterCompletionOfBusinessCombination
Namespace Prefix:	mcaau_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The period of time after a business combination which must elapse before consideration of the share price condition for transfer of shares in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	mcaau_ThresholdPeriodAfterBusinessCombinationInWhichSpecifiedTradingDaysWithinAnySpecifiedTradingDayPeriodCommences
Namespace Prefix:	mcaau_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

When determining the condition for transfer of shares without restriction after a business combination, the number of consecutive trading days used to observe the share price in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	mcaau_TransferAssignOrSellAnySharesOrWarrantAfterCompletionOfInitialBusinessCombinationThresholdConsecutiveTradingDays
Namespace Prefix:	mcaau_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share amount of price threshold that must be achieved in order to waive the restriction on transfer of shares during a restricted period after a business combination.

+ References

No definition available.

+ Details

Name:	mcaau_TransferAssignOrSellAnySharesOrWarrantsAfterCompletionOfInitialBusinessCombinationStockPriceTrigger
Namespace Prefix:	mcaau_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

When determining the condition for transfer of shares without restriction after a business combination, the number of days in which the share price must exceed the specified amount in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	mcaau_TransferAssignOrSellAnySharesOrWarrantsAfterCompletionOfInitialBusinessCombinationThresholdTradingDay
Namespace Prefix:	mcaau_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=mcaau_FounderSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mcaau_SponsorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_Dr.UtzClaassenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_WinstonMaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_Dr.CorneliusBoerschMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_DanielWenzelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_AlexanderHornungMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_MilesGilburneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=mcaau_Dr.PhillipRoslerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RELATED PARTY TRANSACTIONS - Founder Shares (Details) - USD ($)			6 Months Ended
	Jul. 13, 2021	Apr. 23, 2021	Jun. 30, 2023	Dec. 31, 2022	Nov. 12, 2021	Aug. 23, 2021
Class B ordinary shares
RELATED PARTY TRANSACTIONS
Number of shares issued	7,187,500
Ordinary shares, par value (in dollars per share)			$ 0.0001	$ 0.0001
Number of shares cancelled	1,437,500
Ordinary shares, shares outstanding	5,750,000	7,187,500	5,750,000	5,750,000
Maximum shares subject to forfeiture	750,000
Over-allotment option \| Class B ordinary shares
RELATED PARTY TRANSACTIONS
Number of shares not subject to forfeiture					750,000
Founder shares \| Class B ordinary shares
RELATED PARTY TRANSACTIONS
Number of shares issued	7,187,500	7,187,500
Ordinary shares, par value (in dollars per share)		$ 0.0001
Number of shares cancelled	1,437,500
Ordinary shares, shares outstanding	5,750,000
Stock price trigger to transfer, assign or sell any shares or warrants of the company, after the completion of the initial Business Combination (in dollars per share)			$ 12.00
Threshold trading days for transfer, assign or sale of shares or warrants, after the completion of the initial Business Combination			20 days
Threshold consecutive trading days for transfer, assign or sale of shares or warrants, after the completion of the initial Business Combination			30 days
Threshold period after the business combination in which the 20 trading days within any 30 trading day period commences			150 days
Founder shares \| Sponsor
RELATED PARTY TRANSACTIONS
Consideration received		$ 25,000
Price per share		$ 0.003
Period after to transfer shares			1 year
Founder shares \| Sponsor \| Class B ordinary shares \| Dr. Utz Claassen
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						550,000
Founder shares \| Sponsor \| Class B ordinary shares \| Winston Ma
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						25,000
Founder shares \| Sponsor \| Class B ordinary shares \| Dr. Cornelius Boersch
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						20,000
Founder shares \| Sponsor \| Class B ordinary shares \| Daniel Wenzel
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						20,000
Founder shares \| Sponsor \| Class B ordinary shares \| Alexander Hornung
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						20,000
Founder shares \| Sponsor \| Class B ordinary shares \| Miles Gilburne
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						20,000
Founder shares \| Sponsor \| Class B ordinary shares \| Dr. Phillip Rosler
RELATED PARTY TRANSACTIONS
Number of shares transferred by sponsor						20,000
Founder shares \| Over-allotment option
RELATED PARTY TRANSACTIONS
Maximum shares subject to forfeiture	750,000
Number of shares not subject to forfeiture					750,000