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Revenues (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Products:    
Net revenues $ 10,258,132 $ 10,256,212
Acetadote
   
Products:    
Net revenues 7,251,995 7,351,084
Kristalose
   
Products:    
Net revenues 2,117,250 2,256,273
Caldolor
   
Products:    
Net revenues 410,424 99,079
Other
   
Products:    
Net revenues $ 478,463 $ 549,776