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Note D - Factoring (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   
December 31,
  
   
2020
    
2019
  
                 
Accounts receivable - current
   $
561,834
     $
139,785
  
Accounts receivable - non current
    
1,720,000
      
1,720,000
  
     
2,281,834
      
1,859,785
  
                 
Allowance for doubtful accounts - current
    
(13,785
)
    
(13,785
)
Allowance for doubtful accounts - non current
    
(1,720,000
)
    
(1,720,000
)
     
(1,733,785
)
    
(1,733,785
)
                 
Accounts receivable, net of allowances for doubtful accounts
   $
548,049
     $
126,000
  
Factoring Fees [Table Text Block]
   
Years Ended December 31,
  
   
2020
    
2019
  
                 
Factoring fees
   $
98,748
     $
203,950
  
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, 2020
  
 
 
 
  
 
 
 
  
 
 
 
Factored accounts receivable
   $
241,715
     $
181,262
     $
60,453
  
Year Ended December 31, 2019
  
 
 
 
  
 
 
 
  
 
 
 
Factored accounts receivable
   $
233,005
     $
122,064
     $
110,941