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Revenues (Schedule of Net Product Revenues by Product) (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenue from External Customer [Line Items]      
Revenues $ 32,407,845 $ 28,803,961 $ 25,549,058
Acetadote      
Revenue from External Customer [Line Items]      
Revenues 3,824,449 4,284,111 6,576,720
Omeclamox-Pak      
Revenue from External Customer [Line Items]      
Revenues 837,829 623,297 1,761,868
Kristalose      
Revenue from External Customer [Line Items]      
Revenues 12,895,120 12,055,625 11,455,805
Vaprisol      
Revenue from External Customer [Line Items]      
Revenues 936,615 1,763,874 1,576,222
Caldolor      
Revenue from External Customer [Line Items]      
Revenues 5,222,282 5,001,997 4,178,443
Vibativ      
Revenue from External Customer [Line Items]      
Revenues $ 8,691,550 $ 5,075,057 $ 0