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Note 3 - Accounts Receivable (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
2016
    
2015
  
Accounts receivable
   $
44,860
     $
44,948
  
                 
Provision for doubtful accounts
    
(27,666
 )    
-
  
                 
Net accounts receivable
  $
17,194
     $
44,948