v3.25.2

Operating Segments (Details) - USD ($)	12 Months Ended
Operating Segments (Details) - USD ($)	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Operating Segments [Abstract]
Accounts receivables
Revenues

X

- References

No definition available.

+ Details

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

X

- References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_OtherRevenue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represent the amount of accounts receivables.

+ References

No definition available.

+ Details

Name:	math_AccountsReceivables
Namespace Prefix:	math_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant