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

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	vmar_IfrsStockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix:	vmar_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Reduction in the number of shares during the period as a result of a reverse stock split.

+ References

No definition available.

+ Details

Name:	vmar_IfrsStockIssuedDuringPeriodSharesReverseStockSplits
Namespace Prefix:	vmar_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

No definition available.

+ Details

Name:	vmar_IfrsStockholdersEquityNoteStockSplitConversionRatio
Namespace Prefix:	vmar_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of reverse stock splits.

+ References

No definition available.

+ Details

Name:	vmar_NumberOfReverseStockSplits
Namespace Prefix:	vmar_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the proceeds from capital raise of gross receivable from placement agent.

+ References

No definition available.

+ Details

Name:	vmar_ProceedsFromCapitalRaiseOfGrossReceivableFromPlacementAgent
Namespace Prefix:	vmar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of transaction cost net related to the issuance of stock.

+ References

No definition available.

+ Details

Name:	vmar_TransactionCostNetRelatedToIssuanceOfStock
Namespace Prefix:	vmar_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	vmar_IfrsSaleOfStockAxis=vmar_AtMarketOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_MajorOrdinaryShareTransactionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent events (Details)			2 Months Ended	9 Months Ended
Subsequent events (Details)	Jun. 17, 2026 shares	Jan. 14, 2026 shares	Jul. 31, 2026 USD ($) shares	May 31, 2026 USD ($) shares
Disclosure of non-adjusting events after reporting period [line items]
Number of voting common Shares issued to third parties in exchange for services				2,356
Reverse stock split ratio	10	40
Number of reverse stock splits	1	1
Additional voting common shares		7,121
At the market public offering
Disclosure of non-adjusting events after reporting period [line items]
Less transaction costs \| $				$ 229,551
Issue of common shares
Disclosure of non-adjusting events after reporting period [line items]
Reverse stock split ratio	10
Number of reverse stock splits	1
Additional voting common shares	48,468
Issue of common shares \| At the market public offering
Disclosure of non-adjusting events after reporting period [line items]
Number of voting common Shares issued to third parties in exchange for services			1,871,347
Total gross proceeds \| $			$ 4,791,043
Less transaction costs \| $			$ 201,299