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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Inventories [Abstract]      
Inventory, Work in Process $ 799 $ 897 $ 787
Inventory, Production 680 302  
Inventory, Spoilage $ (778) $ (192)  
Inventory Shelf Life 42 months