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Note 5 - Inventories
12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]

5. Inventories


Inventories consist of the following:


   

Year ended December 31,

 
   

2013

   

2012

 

Finished products

  $ 373,281     $ 602,753  

Work-in-process

    817,456       666,830  

Raw materials

    1,548,076       1,402,033  

Net Inventories

  $ 2,738,813     $ 2,671,616