Organization and Operations	12 Months Ended
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations	ORGANIZATION AND OPERATIONS ORGANIZATION Finjan Holdings, Inc. (the “Company” or “Finjan Holdings”), a Delaware corporation, operates a cybersecurity business focused in four business lines: intellectual property licensing and enforcement, advisory services, mobile security application development and investing in cybersecurity technologies and intellectual property. Revenues and operations from the Company’s Finjan Mobile security business and the Company’s CybeRisk advisory services were deemed immaterial for the years ended December 31, 2016 and 2015. Licensing and enforcement of the Company's cybersecurity patent portfolio is operated, through its wholly-owned subsidiary Finjan, Inc. ("Finjan"). Finjan became a wholly owned subsidiary of Finjan Holdings in June of 2013 after a merger transaction, following which the Company began trading on the OTC Markets. The Company’s common stock has been trading on the NASDAQ Capital Market ("NASDAQ") since May 2014. Finjan was founded in 1997 as a wholly-owned subsidiary of Finjan Software Ltd. (“FSL”). FSL, together with its subsidiaries, sold enterprise web security solutions, including real-time and behavior-based malware prevention. In October 2003, FSL transferred all of its shares in Finjan to Finjan Software, Inc. (“FSI”). As a result of this transfer, Finjan became a wholly-owned subsidiary of FSI (the “Former Parent”). On December 8, 2010, Finjan, Inc. changed its name to FI Delaware, Inc. On October 22, 2012, FI Delaware, Inc. changed its name back to Finjan, Inc. In October 2009, FSI transferred its portfolio of intellectual property to Finjan (its wholly-owned subsidiary at the time). Thereafter, in November 2009, FSI sold certain assets, including certain of its operating subsidiaries, not including Finjan, and its sales and marketing assets to M86 Security (“M86”). Finjan also granted a fully-paid, non-exclusive patent license to M86, in consideration for which M86 issued shares of its common stock to Finjan and FSI. In connection with that transaction, and subsequent to November 2009, FSI and its remaining subsidiaries (including Finjan) ceased the development, manufacture, marketing and sale of its products, as well as research conducted through its Malicious Code Research Center as part of a confidential non-compete provision. Finjan retained ownership of its patents and all related rights. In March 2012, M86 merged with Trustwave Holdings, Inc. (“Trustwave”) through which M86’s license from Finjan was renewed with Trustwave to include an expanded scope and an extension of the non-compete for the development of software and hardware security products. In September 2015, Trustwave was acquired by Singapore Telecom (“SingTel”). Finjan’s agreement with Trustwave includes extended royalty obligations upon achievement of certain sales milestones. To date, Finjan has not received any additional payments under the license. In February 2013, Finjan distributed all securities it held in two unaffiliated entities to FSI, and made a payment of cash in an amount sufficient to repay and satisfy in full a pre-existing intercompany loan from FSI to Finjan. Following that distribution, the board of directors and stockholders of FSI approved the dissolution of, and a plan of liquidation for, FSI that resulted, among other things, in the distribution of Finjan's common stock to certain of FSI’s stockholders, whereby Finjan ceased to be a subsidiary of the Former Parent.

ORGANIZATION AND OPERATIONS

ORGANIZATION

Finjan Holdings, Inc. (the “Company” or “Finjan Holdings”), a Delaware corporation, operates a cybersecurity business focused in four business lines: intellectual property licensing and enforcement, advisory services, mobile security application development and investing in cybersecurity technologies and intellectual property. Revenues and operations from the Company’s Finjan Mobile security business and the Company’s CybeRisk advisory services were deemed immaterial for the years ended December 31, 2016 and 2015. Licensing and enforcement of the Company's cybersecurity patent portfolio is operated, through its wholly-owned subsidiary Finjan, Inc. ("Finjan"). Finjan became a wholly owned subsidiary of Finjan Holdings in June of 2013 after a merger transaction, following which the Company began trading on the OTC Markets. The Company’s common stock has been trading on the NASDAQ Capital Market ("NASDAQ") since May 2014.

Finjan was founded in 1997 as a wholly-owned subsidiary of Finjan Software Ltd. (“FSL”). FSL, together with its subsidiaries, sold enterprise web security solutions, including real-time and behavior-based malware prevention. In October 2003, FSL transferred all of its shares in Finjan to Finjan Software, Inc. (“FSI”). As a result of this transfer, Finjan became a wholly-owned subsidiary of FSI (the “Former Parent”). On December 8, 2010, Finjan, Inc. changed its name to FI Delaware, Inc. On October 22, 2012, FI Delaware, Inc. changed its name back to Finjan, Inc.

In October 2009, FSI transferred its portfolio of intellectual property to Finjan (its wholly-owned subsidiary at the time). Thereafter, in November 2009, FSI sold certain assets, including certain of its operating subsidiaries, not including Finjan, and its sales and marketing assets to M86 Security (“M86”). Finjan also granted a fully-paid, non-exclusive patent license to M86, in consideration for which M86 issued shares of its common stock to Finjan and FSI. In connection with that transaction, and subsequent to November 2009, FSI and its remaining subsidiaries (including Finjan) ceased the development, manufacture, marketing and sale of its products, as well as research conducted through its Malicious Code Research Center as part of a confidential non-compete provision. Finjan retained ownership of its patents and all related rights. In March 2012, M86 merged with Trustwave Holdings, Inc. (“Trustwave”) through which M86’s license from Finjan was renewed with Trustwave to include an expanded scope and an extension of the non-compete for the development of software and hardware security products. In September 2015, Trustwave was acquired by Singapore Telecom (“SingTel”). Finjan’s agreement with Trustwave includes extended royalty obligations upon achievement of certain sales milestones. To date, Finjan has not received any additional payments under the license.

In February 2013, Finjan distributed all securities it held in two unaffiliated entities to FSI, and made a payment of cash in an amount sufficient to repay and satisfy in full a pre-existing intercompany loan from FSI to Finjan. Following that distribution, the board of directors and stockholders of FSI approved the dissolution of, and a plan of liquidation for, FSI that resulted, among other things, in the distribution of Finjan's common stock to certain of FSI’s stockholders, whereby Finjan ceased to be a subsidiary of the Former Parent.