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Inventories (Details Textual) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Raw Materials [Member]
   
Inventory Reserves [Line Items]    
Reserve of obsolete and slow moving inventories $ 4.2 $ 4.2
Finished Goods [Member]
   
Inventory Reserves [Line Items]    
Reserve of obsolete and slow moving inventories $ 1.7 $ 2.7