Commitments and Contingencies - Registration Rights (Details)	7 Months Ended
Dec. 31, 2025 item
Commitments and Contingencies
Number of demands that holders are entitled	3

Represents the maximum number of demands that securities holders are entitled to make in the Registration Rights.

No definition available.

Name:	sbxe_RegistrationOfRightsSecuritiesHoldersMaximumNumberOfDemandsEntitled
Namespace Prefix:	sbxe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration