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Note B - Factoring (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
December 31,
  
   
201
7
    
201
6
  
                 
Accounts receivable - current
   $
2,889,731
     $
1,577,031
  
Accounts receivable
- non current
    
1,760,000
      
2,070,000
  
     
4,649,731
      
3,647,031
  
Allowance for doubtful accounts - current
    
(13,785
)
    
(13,785
)
Allowance for doubtful accounts
- non current
    
(1,000,000
)
    
(500,000
)
     
(1,013,785
)
    
(513,785
)
                 
Accounts receivable, net of allowances for doubtful accounts
   $
3,635,946
     $
3,133,246
  
Factoring Fees [Table Text Block]
   
Years Ended December 31,
  
   
2017
    
2016
  
                 
Factoring fees
   $
224,142
     $
341,023
  
Factored Accounts Receivable [Member]  
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
Original Invoice
Value
    
Factored
Amount
    
Factored
Balance due
  
Year Ended December 31, 2017
  
 
 
 
  
 
 
 
  
 
 
 
Factored accounts receivable
   $
423,349
     $
313,484
     $
109,865
  
Year Ended December 31, 2016
  
 
 
 
  
 
 
 
  
 
 
 
Factored accounts receivable
   $
214,556
     $
160,918
     $
53,638