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Note 4 - Accounts Payable and Accrued Expenses (Tables)
6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
 
 
June 30
,
2017
 
 
December 31, 2016
 
                 
Legal
  $
-
    $
1,190
 
Accounting
   
13,222
     
-
 
Patent expense
   
-
     
37,142
 
Research and development
   
30,970
     
116,255
 
Other
   
29,620
     
13,400
 
                 
    $
73,812
    $
167,987