Licensed Technology (Notes)	12 Months Ended
Dec. 31, 2015
Research and Development [Abstract]
Licensed Technology	Licensed Technology The George Washington University In December 2014, the Company entered into a patent license agreement with the George Washington University (GW). Pursuant to this license agreement, GW exclusively licensed to the Company certain intellectual property rights relating to LJPC-501 (501 IP Rights). Under this license agreement, the Company paid a one-time license initiation fee of $250,000, which is included in research and development expense for the year ended December 31, 2014. Additional payments are due upon the achievement of certain development and regulatory milestones and for royalties on products covered by the 501 IP Rights. Inserm Transfert SA In February 2014, the Company entered into a license agreement with Inserm Transfert SA (Inserm). Pursuant to this license agreement, Inserm exclusively licensed to the Company certain intellectual property rights relating to LJPC-401 (401 IP Rights). Under this license agreement, the Company paid a one-time license initiation fee of approximately $140,000, which is included in research and development expense for the year ended December 31, 2014. Additional payments are due upon the achievement of certain development and regulatory milestones and for royalties on products covered by the 401 IP Rights. Other In-Licensed Technology The Company continues to seek additional technology for potential new development programs and, as a result, has entered into various licensing agreements for intellectual property rights. In 2015, the Company formed foreign subsidiaries to acquire and in-license various early-stage technology from Indiana University Research and Technology Corporation, Vanderbilt University and the Board of Trustees of the Leland Stanford Junior University. The Company has incurred licensing and milestone fees of $754,000 and $493,000 in connection with its licensing agreements for the years ended December 31, 2015 and 2014, respectively.

Licensed Technology

The George Washington University

In December 2014, the Company entered into a patent license agreement with the George Washington University (GW). Pursuant to this license agreement, GW exclusively licensed to the Company certain intellectual property rights relating to LJPC-501 (501 IP Rights). Under this license agreement, the Company paid a one-time license initiation fee of $250,000, which is included in research and development expense for the year ended December 31, 2014. Additional payments are due upon the achievement of certain development and regulatory milestones and for royalties on products covered by the 501 IP Rights.

Inserm Transfert SA

In February 2014, the Company entered into a license agreement with Inserm Transfert SA (Inserm). Pursuant to this license agreement, Inserm exclusively licensed to the Company certain intellectual property rights relating to LJPC-401 (401 IP Rights). Under this license agreement, the Company paid a one-time license initiation fee of approximately $140,000, which is included in research and development expense for the year ended December 31, 2014. Additional payments are due upon the achievement of certain development and regulatory milestones and for royalties on products covered by the 401 IP Rights.

Other In-Licensed Technology

The Company continues to seek additional technology for potential new development programs and, as a result, has entered into various licensing agreements for intellectual property rights. In 2015, the Company formed foreign subsidiaries to acquire and in-license various early-stage technology from Indiana University Research and Technology Corporation, Vanderbilt University and the Board of Trustees of the Leland Stanford Junior University.

The Company has incurred licensing and milestone fees of $754,000 and $493,000 in connection with its licensing agreements for the years ended December 31, 2015 and 2014, respectively.