v3.25.4
Document And Entity Information
9 Months Ended
Sep. 30, 2025
Document Information Line Items  
Entity Central Index Key 0001567900
Document Type S-4/A
Amendment Description Amendment No. 8
Entity Registrant Name BLACKBOXSTOCKS INC.
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Flag true