Condensed Statements of Changes in Shareholders' Deficit (Parenthetical)	Oct. 01, 2025 shares
Common Stock [Member]
Common stock share no longer subject to forfeiture	1,500,000

Common stock share no longer subject to forfeiture.

No definition available.

Name:	bcss_CommonStockShareNoLongerSubjectToForfeiture
Namespace Prefix:	bcss_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant