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Organization and Nature of Operations	12 Months Ended
Organization and Nature of Operations	Dec. 31, 2013
Organization and Nature of Operations
Organization and Nature of Operations	1. Organization and Nature of Operations Supernus Pharmaceuticals, Inc. (the Company) was incorporated in Delaware on March 30, 2005, and commenced operations on December 22, 2005. The Company is a specialty pharmaceutical company focused on developing and commercializing products for the treatment of central nervous system diseases, including neurological and psychiatric disorders. The Company markets two epilepsy products, Oxtellar XR and Trokendi XR, and has several proprietary product candidates in clinical development that address the attention deficit hyperactivity disorder market. The Company commenced the commercialization of Oxtellar XR and Trokendi XR in 2013. Oxtellar XR received final approval from the Food and Drug Administration (FDA) on October 19, 2012 and the Company launched this product on February 4, 2013. The Company received final approval from the FDA for Trokendi XR on August 16, 2013 and the Company launched this product on August 26, 2013.