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Note 5 - Property and Equipment
3 Months Ended
Mar. 31, 2015
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 March 31, 2015 and December 31, 2014:
 
   
March 31,
2015
   
December 31,
2014
 
Laboratory equipment
  $ 525,956     $ 510,106  
Leasehold improvements
    115,605       115,605  
Other furniture, fixtures & equipment
    28,685       28,685  
Total property and equipment
    670,246       654,396  
Accumulated depreciation and amortization
    (564,937 )     (557,703 )
Property and equipment, net
  $ 105,309     $ 96,693