XML 15 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2020
Nov. 12, 2020
Document Information [Line Items]    
Entity Registrant Name BLACKBOXSTOCKS INC.  
Entity Central Index Key 0001567900  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Current Reporting Status Yes  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Small Business true  
Entity Interactive Data Current Yes  
Entity Common Stock, Shares Outstanding (in shares)   8,341,130
Entity Shell Company false  
Document Type 10-Q  
Document Period End Date Sep. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Amendment Flag false