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Note 6 - Inventories (Tables)
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   
June 30,
2014
   
December 31,
2013
 
Raw materials
  $ 6,294,799     $ 5,926,030  
Work-in-process
    2,165,551       2,308,233  
Finished goods
    5,403,815       2,762,522  
          Total
  $ 13,864,165     $ 10,996,785