XML 16 R7.htm IDEA: XBRL DOCUMENT

Organization and Basis of Presentation	9 Months Ended
Organization and Basis of Presentation	Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Basis of Presentation	1. Organization and Basis of Presentation Organization Calithera Biosciences, Inc. (the “Company”) was incorporated in the State of Delaware on March 9, 2010. The Company is a clinical-stage biopharmaceutical company focused on discovering and developing small molecule drugs that target novel and critical metabolic pathways in tumor and cancer-fighting immune cells. The Company’s principal operations are based in South San Francisco, California, and it operates in one segment. Presentation The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, Calithera Biosciences UK Limited. All significant intercompany accounts and transactions have been eliminated from the condensed consolidated financial statements.