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Inventories, Net (Tables)
9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]

 

 
  September 30,
2012
    December 31,
2011
 
Raw materials   $ 3,469,000     $ 3,027,000  
Work in process     1,330,000       1,503,000  
Finished goods     10,855,000       9,192,000  
Allowance for excess quantities     (609,000 )     (384,000 )
Total inventories   $ 15,045,000     $ 13,338,000