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Organization and Description of the Business	3 Months Ended
Organization and Description of the Business	Mar. 31, 2019
Organization and Description of the Business [Abstract]
Organization and Description of the Business	1. Organization and Description of the Business AmpliPhi Biosciences Corporation (the “Company”) was incorporated in the state of Washington in 1989 under the name Targeted Genetics Corporation. In February 2011, Targeted Genetics Corporation changed its name to AmpliPhi Biosciences Corporation. The Company is dedicated to developing novel antibacterial therapies called bacteriophage (phage). Phages are naturally occurring viruses that preferentially bind to and kill their bacterial targets. As discussed in more detail in Note 9, Merger with C3J Therapeutics, Inc., in January 2019, the Company announced that it entered into a merger agreement with C3J Therapeutics, Inc. (“C3J”), a private clinical stage biotechnology company focused on the development of novel targeted antimicrobials in an all-stock transaction, subject to shareholder approval.