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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mbav_M3PartnersMember
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Related Party Transactions (Details) - USD ($)						10 Months Ended	12 Months Ended
Related Party Transactions (Details) - USD ($)	Jul. 16, 2025	Jun. 16, 2025	May 27, 2025	May 23, 2025	Mar. 15, 2024	Dec. 31, 2024	Dec. 31, 2025	Dec. 22, 2025	Sep. 19, 2025	Jun. 18, 2025	Apr. 04, 2025	Aug. 02, 2024	Aug. 01, 2024
Related Party Transactions [Line Items]
Share price (in Dollars per share)							$ 18
Agreed to purchase (in Shares)						8,337,500
Aggregate purchase price			$ 10
Price per warrants (in Dollars per share)							$ 0.01
Advance from related party							$ 24,440
Director compensation expense						$ 0	1,617,000
Accrued compensation						98,948	4,796,309
Convertible Promissory Note [Member]
Related Party Transactions [Line Items]
Aggregate loan expenses							300,000
Aggregate principal amount		$ 2,500,000
Unpaid principal balance		$ 1,500,000
Non-Employee Director Compensation Plan [Member]
Related Party Transactions [Line Items]
Accrued compensation						0	$ 891,500
Sponsor [Member]
Related Party Transactions [Line Items]
Owned purchase price (in Shares)							5,043,750
Convertible loans	$ 1,500,000
Advance from related party				$ 51,898			$ 24,440				$ 378,757
Related Party [Member]
Related Party Transactions [Line Items]
Advance from related party
Due from related party							527
Related Party [Member] \| Convertible Promissory Note [Member]
Related Party Transactions [Line Items]
Borrowings								$ 500,000	$ 1,500,000	$ 500,000
Outstanding balance						$ 0	$ 2,500,000
Founders Shares [Member]
Related Party Transactions [Line Items]
Share price (in Dollars per share)							$ 0.004
Shares subject to forfeiture (in Shares)
Founders Shares [Member] \| Sponsor [Member]
Related Party Transactions [Line Items]
Shares issued					7,187,500
Capital contribution							$ 25,000
Working Capital Loan [Member] \| Sponsor [Member]
Related Party Transactions [Line Items]
Convertible loans							$ 1,500,000
Warrant price (in Dollars per share)							$ 1
Private Placement Warrants [Member]
Related Party Transactions [Line Items]
Agreed to purchase (in Shares)							8,337,500
Owned purchase price (in Shares)			3,293,750	5,043,750			8,337,500
Purchase price (in Dollars per share)		$ 1
Private Placement Warrants [Member] \| Sponsor [Member]
Related Party Transactions [Line Items]
Owned purchase price (in Shares)			3,293,750	5,043,750			5,043,750
Aggregate purchase price				$ 6,467,500
Price per warrants (in Dollars per share)							$ 1
Class A Ordinary Shares [Member]
Related Party Transactions [Line Items]
Share price (in Dollars per share)							$ 12
Trading days							20 days
Consecutive trading day threshold							30 days
Initial business combination period							150 days
Par value (in Dollars per share)						$ 0.0001	$ 0.0001
Class A Ordinary Shares [Member] \| Private Placement Warrants [Member]
Related Party Transactions [Line Items]
Purchase of each warrants (in Shares)							1
Price per warrants (in Dollars per share)		$ 11.5					$ 11.5
Class A Ordinary Shares [Member] \| Private Placement Warrants [Member] \| Sponsor [Member]
Related Party Transactions [Line Items]
Purchase of each warrants (in Shares)							1
Price per warrants (in Dollars per share)							$ 11.5
Class B Ordinary Shares [Member]
Related Party Transactions [Line Items]
Shares subject to forfeiture (in Shares)							937,500						937,500
Par value (in Dollars per share)						$ 0.0001	$ 0.0001
Class B Ordinary Shares [Member] \| Sponsor [Member]
Related Party Transactions [Line Items]
Agreed to purchase (in Shares)				7,187,500
Par value (in Dollars per share)				$ 0.0001
Initial Public Offering [Member]
Related Party Transactions [Line Items]
Share price (in Dollars per share)												$ 10
Initial Public Offering [Member] \| Sponsor [Member]
Related Party Transactions [Line Items]
Advance from related party						$ 98,212	$ 280,545
Initial Public Offering [Member] \| M3 Partners [Member]
Related Party Transactions [Line Items]
Advance from related party							$ 76,338