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Revenues (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Products:        
Net revenues $ 7,081,088 $ 12,366,940 $ 17,339,220 $ 22,623,152
Acetadote
       
Products:        
Net revenues 4,146,974 9,770,168 11,398,968 17,121,252
Kristalose
       
Products:        
Net revenues 2,041,043 2,140,783 4,158,293 4,397,056
Caldolor
       
Products:        
Net revenues 615,547 210,323 1,025,971 309,403
Other
       
Products:        
Net revenues $ 277,524 $ 245,666 $ 755,988 $ 795,441