Description of Organization and Business Operations (Details Narrative) - USD ($)		1 Months Ended			9 Months Ended
	Jul. 08, 2025	Sep. 22, 2026	Jun. 29, 2026	Mar. 22, 2024	Aug. 31, 2026	Dec. 22, 2026	Aug. 14, 2026	Mar. 31, 2026	Nov. 30, 2025	Jun. 22, 2025	Mar. 15, 2025	Mar. 20, 2024
Subsidiary, Sale of Stock [Line Items]
Sale of units in public offering					1,035,000
Sale of units per share												$ 0.0126
Transaction costs					$ 4,309,493
Cash underwriting					690,000
Deferred underwriting fees					2,415,000
Issuance of representative shares					690,000
Other offering costs					$ 514,493
Proceeds from sale of public units				$ 69,345,000
Percentage of asset held in trust account					80.00%
Business combination, percentage of voting securities					50.00%
Share price					$ 10.00
Net tangible assets					$ 5,000,001
Deposits	$ 150,000				690,000					$ 150,000	$ 250,000
Interest payable					100,000
Transaction value					$ 70,000,000
Shares exercised	4,775,923
Class A Odinary shares subject to possible redemption, shares outstanding					2,124,077				2,124,077
Market value								$ 50,000,000
Consecutive business							$ 50,000,000	$ 50,000,000
Debt Forgiveness Agreement description			On June 30, 2026, Black Hawk and Vesicor entered into a Debt Forgiveness Agreement pursuant to which Vesicor forgave $1,015,988 in advances previously made by Vesicor to or on behalf of Black Hawk (the “Vesicor Advances”) as of February 12, 2026. The Vesicor Advances consisted of (i) $675,000 in extension payment advances made between July 2025 and February 2026, representing Vesicor’s one-half share of the monthly $150,000 trust fund extension payments required under the Business Combination Agreement and the amended Trust Agreement, and (ii) $340,988 in upfront fee payments and other transaction expenses paid by Vesicor on Black Hawk’s behalf between March 2025 and April 2025 for upfront fees and February 2026 for other transaction expenses. All advances were made on a non-interest basis.
Cash					$ 12,052				$ 39,521
[custom:WorkingCapitalDeficit-0]					2,294,124
Ordinary Shares [Member]
Subsidiary, Sale of Stock [Line Items]
Deposits					$ 22,700,000
Shares exercised					4,775,923
Shares exercised, value					$ 51,000,000.0
Subsequent Event [Member]
Subsidiary, Sale of Stock [Line Items]
Deposits						$ 150,000
Aggregate amount		$ 150,000
IPO [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of units in public offering				6,900,000
Sale of units per share				$ 10.00
Proceeds from sale of IPO Units				$ 69,000,000
Proceeds from sale of private placements				2,355,000
Share price					$ 10.05
Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Sale of units in public offering				235,500
Sale of units per share				$ 10.00
Over-Allotment Option [Member]
Subsidiary, Sale of Stock [Line Items]
Share price					$ 0.10
Aggregate amount					$ 1,380,000
Shares exercised, value				$ 93,150