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Organization and Basis of Presentation	12 Months Ended
Organization and Basis of Presentation	Dec. 31, 2019
Organization and Basis of Presentation
Organization and Basis of Presentation	1. ORGANIZATION AND BASIS OF PRESENTATION Ardelyx, Inc. (the “Company,” “we,” “us” or “our”) is a specialized biopharmaceutical company focused on developing first-in-class medicines to improve treatment choices for people with cardiorenal diseases. The Company operates in only one business segment, which is the research and development of biopharmaceutical products.