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Note 6 - Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
September 30,
2018
   
December 31,
2017
 
Accrued management salaries
  $
816,715
    $
532,615
 
Accrued directors’ fees
   
265,420
     
182,620
 
Other accrued expenses
   
67,623
     
18,476
 
Total accrued expenses
  $
1,149,758
    $
733,711