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Note G - Note Receivable (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

December 31,

 
  

2021

  

2020

 
         

Accounts receivable

 $1,234,411  $561,834 
Loss on foreign currency  (50,000)  - 

Allowance for doubtful accounts

  (213,785

)

  (13,785

)

Accounts receivable, net of allowances for doubtful accounts

 $970,626  $548,049 
Notes Receivable [Member]  
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   

December 31,

   

December 31,

 
   

2021

   

2020

 
                 

Note receivable

  $ 295,000     $ 295,000  

Allowance for doubtful account

    (100,000 )     -  

Note receivable, net of allowance

    195,000       295,000  
Current portion, net of allowance   $ 82,000     $ 295,000  
Noncurrent portion, net of allowance   $ 113,000     $ -