v3.25.2

Accounts and Other Payables (Details) $ in Millions	Mar. 23, 2024 USD ($)
Accounts and Other Payables [Abstract]
Issued note	$ 5
Interest bearing percentage	5.00%
Matured	3 months

X

- References

No definition available.

+ Details

Name:	ifrs-full_TradeAndOtherPayablesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of interest bearing.

+ References

No definition available.

+ Details

Name:	math_InterestBearingPercentage
Namespace Prefix:	math_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Matured.

+ References

No definition available.

+ Details

Name:	math_Matured
Namespace Prefix:	math_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from the issuance of notes.

+ References

No definition available.

+ Details

Name:	math_ProceedsFromIssuanceOfNotes
Namespace Prefix:	math_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration