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Note 3 - Inventories
12 Months Ended
Dec. 31, 2011
Inventory Disclosure [Text Block]
3.         Inventories

Inventories consisted of the following:

   
December 31,
 
   
2011
   
2010
 
             
Raw materials
  $ 8,007,000     $ 8,536,000  
Work in process
    3,048,000       1,797,000  
Finished goods
    4,511,000       6,985,000  
    $ 15,566,000     $ 17,318,000