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Revenues (Schedule of Net Product Revenues by Product) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenue from External Customer [Line Items]      
Net product revenue $ 31,100,698 $ 47,944,031 $ 50,893,794
Product, Acetadote
     
Revenue from External Customer [Line Items]      
Net product revenue 18,846,753 37,522,180 42,454,055
Product, Omeclamox-Pak
     
Revenue from External Customer [Line Items]      
Net product revenue 1,045,815 0 0
Product, Kristalose
     
Revenue from External Customer [Line Items]      
Net product revenue 9,118,475 9,429,741 8,517,873
Product, Caldolor
     
Revenue from External Customer [Line Items]      
Net product revenue $ 2,089,655 $ 992,110 $ (78,134)