The amounts payable resulting from related party transactions. [Refer: Total for all related parties [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2025-01-01
-Paragraph 20
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2025-en-r&anchor=para_20&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2025-01-01
-Paragraph 18
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2025-en-r&anchor=para_18_b&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 230
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_230_b&doctype=Standard
-URIDate 2025-03-27

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 230
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_230_b&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_AmountsPayableRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amounts receivable resulting from related party transactions. [Refer: Total for all related parties [member]]

+ References

+ Details

Name:	ifrs-full_AmountsReceivableRelatedPartyTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Definition

The amount due to (from) related party from related party transactions.

+ References

No definition available.

+ Details

Name:	vmar_AmountDueToFromRelatedPartiesRelatedPartyTransactions
Namespace Prefix:	vmar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of interest payable to related party.

+ References

No definition available.

+ Details

Name:	vmar_InterestPayableToRelatedParty
Namespace Prefix:	vmar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from related party from sale of real estate properties under real estate agreement.

+ References

No definition available.

+ Details

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

- Definition

Amount of purchase consideration relating to acquisition to business payable to related party.

+ References

No definition available.

+ Details

Name:	vmar_PurchaseConsiderationPayableToRelatedParty
Namespace Prefix:	vmar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of current payables due to related parties.

+ References

No definition available.

+ Details

Name:	vmar_TradeAndOtherCurrentPayableToRelatedParties
Namespace Prefix:	vmar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Related party transactions - Amounts due to and from related parties (Details) - USD ($)	May 31, 2026	Aug. 31, 2025	Jun. 20, 2025
Related party transactions
Share subscription receivable	$ 133,775	$ 28,526
Amounts due to related parties included in trade and other payable	856,059	49,897
Related party interest payable [note 16]	27,255	6,058
Proceeds Receivable From Related Party Under Real Estate Agreement	6,556,314	10,389,917	$ 10,389,917
Purchase Consideration Payable To Related Party	5,659,921	5,048,506
Initial Convertible Note
Related party transactions
Purchase Consideration Payable To Related Party	3,229,563	3,111,810
Subsequent Convertible Note
Related party transactions
Purchase Consideration Payable To Related Party	821,339	653,262
Real Estate Note
Related party transactions
Purchase Consideration Payable To Related Party	1,609,019	1,283,434
Non-interest bearing demand note receivable from Marine Ventures LLC
Related party transactions
Proceeds Receivable From Related Party Under Real Estate Agreement		3,422,154
Contingent receivable from Marine Ventures LLC
Related party transactions
Proceeds Receivable From Related Party Under Real Estate Agreement	6,556,314	6,967,763
9335-1427 Quebec Inc
Related party transactions
Share subscription receivable		18,193
Alexandre Mongeon
Related party transactions
Share subscription receivable		10,333
Amount due to (from) related party	(12,133)
Current advances to (from) related party	47,867
Amounts due to related parties included in trade and other payable	11,538	16,946
Raffi Sossoyan
Related party transactions
Amounts due to related parties included in trade and other payable	3,843	7,277
Roger Moore
Related party transactions
Amount due to (from) related party	10,000
Amounts due to related parties included in trade and other payable	33,986	19,520
Related party interest payable [note 16]	27,255,000	6,058,000
Jesse coors
Related party transactions
Amount due to (from) related party	50,000
Maxime poudrier
Related party transactions
Amounts due to related parties included in trade and other payable	2,885
Daniel Rathe
Related party transactions
Amounts due to related parties included in trade and other payable	3,077	$ 6,154
1925 Holiday holding llc
Related party transactions
Amounts due to related parties included in trade and other payable	131,601
Palm city marine llc
Related party transactions
Amounts due to related parties included in trade and other payable	34,022
NVPB marina holdings llc
Related party transactions
Amounts due to related parties included in trade and other payable	24,973
NV FL 1440 holdings llc
Related party transactions
Amounts due to related parties included in trade and other payable	111,900
NV FL holdings llc
Related party transactions
Amounts due to related parties included in trade and other payable	400,567
Marine Ventures LLC
Related party transactions
Share subscription receivable	133,775
Amounts due to related parties included in trade and other payable	$ 97,667