v3.26.1

CONDENSED STATEMENTS OF CHANGES IN SHAREHOLDERS' DEFICIT (Parenthetical) - shares		9 Months Ended
	Aug. 19, 2025	Dec. 31, 2024
Private Placement
Sale of private placement units (in shares)	455,000	455,000

X

- Definition

Number of new units issued during the period.

+ References

No definition available.

+ Details

Name:	sbxd_UnitsIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	sbxd_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: