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Note 5 - Factoring (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
September
30,
    
December 31,
  
   
2017
    
2016
  
                 
Accounts receivable - current
   $
576,081
     $
1,577,031
  
Accounts receivable - non current
    
2,070,000
      
2,070,000
  
     
2,646,081
      
3,647,031
  
Allowance for doubtful accounts - current
    
(13,785
)
    
(13,785
)
Allowance for doubtful accounts - non current
    
(1,000,000
)
    
(500,000
)
Accounts receivable, net of allowance for doubtful accounts
   $
1,632,296
     $
3,133,246
  
Factoring Fees [Table Text Block]
   
Three Months ended
September 30,
    
Nine Months ended
September 30,
  
   
201
7
    
201
6
    
201
7
    
201
6
  
                                 
Factoring fees
   $
46,409
     $
16,264
     $
180,126
     $
319,627
  
Factored Accounts Receivable [Member]  
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
September 30,
    
December 31,
  
   
2017
    
201
6
  
                 
Original invoice value
   $
115,001
     $
214,556
  
Factored amount
    
(86,251
)
    
(160,918
)
Balance due from factor
   $
28,750
     $
53,638