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Note 5 - Prepaid Expenses, Deposits and Other Current Assets
9 Months Ended
Sep. 30, 2017
Notes to Financial Statements  
Prepaid Expenses, Deposits and Other Current Assets [Text Block]
5.
Prepaid expenses, deposits and other current assets
 
Prepaid expenses, deposits and other current assets consisted of the following:
 
   
September 30,
2017
   
December
31,
2016
 
Prepaid research and development expense
  $
844,521
    $
12,725
 
Prepaid insurance expense
   
126,733
     
9,731
 
Prepaid other
   
33,107
     
28,388
 
Total
  $
1,004,361
    $
50,844