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Financial risk management and fair values of financial instruments (Details Narrative)	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2024 HKD ($)	Dec. 31, 2023 HKD ($)
Financial Risk Management And Fair Values Of Financial Instruments
Interest rate basis	100 basis points in interest rates	100 basis points in interest rates
Change in profit after tax amount	$ 76,000	$ 594,000	$ 372,000

X

- Definition

Change in profit after tax amount.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	MB_
Data Type:	xbrli:stringItemType
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X

- Definition

The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard
-URIDate 2024-03-27

+ Details

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