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Amount of expense for award under share-based payment arrangement for warrant. Excludes amount capitalized.

No definition available.

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

The market price per warrant option granted.

No definition available.

Name:	vmar_ClassOfWarrantOrRightMarketPriceOfWarrantsOrRights
Namespace Prefix:	vmar_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

Weighted average remaining contractual life of warrants, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	vmar_ClassOfWarrantOrRightWeightedAverageRemainingContractualLife
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The option life of warrant options granted.

No definition available.

Name:	vmar_ExpectedLifeWarrantOptionsGranted
Namespace Prefix:	vmar_
Data Type:	xbrli:durationItemType
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Period Type:	duration

The expected volatility of the share price used to calculate the fair value of the warrant options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

No definition available.

Name:	vmar_ExpectedVolatilityWarrantOptionsGranted
Namespace Prefix:	vmar_
Data Type:	dtr-types:percentItemType
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Exercise price per share or per unit of warrants or rights outstanding.

No definition available.

Name:	vmar_IfrsClassOfWarrantOrRightExercisePriceOfWarrantsOrRights
Namespace Prefix:	vmar_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Number of warrants or rights outstanding.

No definition available.

Name:	vmar_NumberOfWarrantsOutstanding
Namespace Prefix:	vmar_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for warrantoptions granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

No definition available.

Name:	vmar_RiskFreeInterestRateWarrantOptionsGranted
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Data Type:	dtr-types:percentItemType
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Period Type:	duration

Name:	vmar_GrantDateAxis=vmar_GrantDateScenario21December2023Member
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Name:	vmar_GrantDateAxis=vmar_GrantDateScenario16September2024Member
Namespace Prefix:
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Name:	vmar_GrantDateAxis=vmar_GrantDateScenario14January2025Member
Namespace Prefix:
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Name:	vmar_GrantDateAxis=vmar_GrantDateScenario15August2025Member
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