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Note 5 - Property and Equipment
9 Months Ended
Sep. 30, 2016
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
5.     Property and Equipment
 
Property and equipment as shown on the accompanying Condensed Consolidated Balance Sheets is composed of the following as of September 30, 2016 and December 31, 2015:
 
   
September 30,
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
    (608,223 )     (586,638 )
Property and equipment, net
  $ 62,023     $ 83,608