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Note 5 - Property and Equipment (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
March 31,
2016
   
December 31,
2015
 
Laboratory equipment
  $ 525,956     $ 525,956  
Leasehold improvements
    115,605       115,605  
Other furniture, fixtures & equipment
    28,685       28,685  
Total property and equipment
    670,246       670,246  
Accumulated depreciation and amortization
    (593,833 )     (586,638 )
Property and equipment, net
  $ 76,413     $ 83,608