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Note 4 - Inventories
12 Months Ended
Dec. 31, 2012
Inventory Disclosure [Text Block]
4.        Inventories

Inventories consisted of the following:

   
December 31,
 
   
2012
   
2011
 
             
Raw materials
  $ 8,212,000     $ 8,007,000  
Work in process
    3,056,000       3,048,000  
Finished goods
    5,896,000       4,511,000  
    $ 17,164,000     $ 15,566,000