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Note 6 - Inventories
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Text Block]
6.             Inventories

As of March 31, 2013 and December 31, 2012, inventories consisted of the following:

   
March 31,
2013
   
December 31,
2012
 
             
Raw materials
  $ 6,920,000     $ 8,212,000  
Work in process
    2,896,000       3,056,000  
Finished goods
    6,483,000       5,896,000  
    $ 16,299,000     $ 17,164,000