Quarterly report pursuant to Section 13 or 15(d)

Cover Page

v3.19.3
Cover Page - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Cover page.    
Entity Central Index Key 0001366340  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2019  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 001-33304  
Entity Registrant Name FINJAN HOLDINGS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-4075963  
Entity Address, Address Line One 2000 University Ave., Suite 600  
Entity Address, City or Town East Palo Alto  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94303  
City Area Code 650  
Local Phone Number 282-3228  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(g) Security Common Stock, par value $0.0001 per share  
Trading Symbol FNJN  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   27,639,888