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Note 4 - Inventories
12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]

4.      Inventories


Inventories consisted of the following:


   

December 31,

 
   

2014

   

2013

 
                 

Raw materials

  $ 6,436,000     $ 5,876,000  

Work in process

    4,834,000       2,178,000  

Finished goods

    5,274,000       6,086,000  
    $ 16,544,000     $ 14,140,000