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Inventories, Net
9 Months Ended
Sep. 30, 2011
Inventory Disclosure [Abstract] 
Inventory Disclosure [Text Block]
Note 5 - Inventories, Net
 
   
September 30,
2011
   
December 31,
2010
 
Raw materials
  $ 3,328,000     $ 2,588,000  
Work in process
    1,103,000       685,000  
Finished goods
    8,627,000       7,471,000  
Allowance for excess quantities
    (437,000 )     (376,000 )
Total inventories
  $ 12,621,000     $ 10,368,000