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Organization and Business	9 Months Ended
Organization and Business	Sep. 30, 2019
Organization and Nature of Operations
Organization and Business	Organization and Business Supernus Pharmaceuticals, Inc. (the Company) was incorporated in Delaware and commenced operations in 2005. The Company is a pharmaceutical company focused on developing and commercializing products for the treatment of central nervous system (CNS) diseases. The Company markets two products: Oxtellar XR for the treatment of epilepsy, and Trokendi XR for the prophylaxis of migraine headache and treatment of epilepsy. The Company has several proprietary product candidates in clinical development that address opportunities in the CNS market. The Company launched Oxtellar XR and Trokendi XR for the treatment of epilepsy in 2013, launched Trokendi XR for the prophylaxis of migraine headache in adolescents and adults in April 2017, and launched Oxtellar XR with an expanded indication to include monotherapy for partial seizures in January 2019.