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Inventories, Net
6 Months Ended
Jun. 30, 2011
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Note 5 - Inventories, Net

   
June 30,
2011
    December 31,
2010
 
Raw materials
  $ 2,930,000     $ 2,588,000  
Work in process
    1,210,000       685,000  
Finished goods
    7,934,000       7,471,000  
Allowance for excess quantities
    (431,000 )     (376,000 )
Total inventories
  $ 11,643,000     $ 10,368,000