Cover Page
Cover Page - USD ($) | 12 Months Ended | ||
Dec. 31, 2019 | Apr. 10, 2020 | Jun. 30, 2019 | |
Cover [Abstract] | |||
Document Type | 10-K/A | ||
Document Annual Report | true | ||
Document Period End Date | Dec. 31, 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 Avenue, 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 | ||
Title of 12(b) Security | Common Stock, par value $0.0001 per share | ||
Entity Well-known Seasoned Issuer | No | ||
Entity Voluntary Filers | No | ||
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 | ||
Entity Public Float | $ 47,486,164 | ||
Entity Common Stock, Shares Outstanding | 27,700,242 | ||
Documents Incorporated by Reference | N | ||
Entity Central Index Key | 0001366340 | ||
Current Fiscal Year End Date | --12-31 | ||
Document Fiscal Year Focus | 2019 | ||
Document Fiscal Period Focus | FY | ||
Amendment Flag | false | ||
No Trading Symbol Flag | false |