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Note 5 - Inventories
9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Text Block]
5.              Inventories

As of September 30, 2012 and December 31, 2011, inventories consisted of the following:

   
September 30,
2012
   
December 31,
2011
 
             
Raw materials
  $ 8,261,000     $ 8,007,000  
Work in process
    3,230,000       3,048,000  
Finished goods
    5,200,000       4,511,000  
    $ 16,691,000     $ 15,566,000