{"cik":1356576,"taxonomy":"us-gaap","tag":"LongTermDebt","label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","entityName":"SUPERNUS PHARMACEUTICALS, INC.","units":{"USD":[{"end":"2012-12-31","val":23225000,"accn":"0001047469-13-002844","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-15","frame":"CY2012Q4I"}]}}