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Note F - Note Receivable (Tables)
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Notes Tables    
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   

March 31,

    

December 31,

  
   

2023

    

2022

  

Accounts receivable

   $ 3,985,988     $ 2,096,569  
Allowance for doubtful accounts     (623,785

)

     (573,785

)
Accounts receivable, net of allowances for doubtful accounts   $ 3,362,203     $ 1,522,784  
   

December 31,

  
   

2022

    

2021

  
                 

Accounts receivable

   $ 2,096,569     $ 1,234,411  
Loss on foreign currency     -       (50,000

)

Allowance for doubtful accounts

     (573,785

)

     (213,785

)

Accounts receivable, net of allowances for doubtful accounts

   $ 1,522,784     $ 970,626  
   

Balance at

Beginning

of Year

    

Charged to

Costs

and

Expenses

    

Deductions

from

Reserves

    

Balance at

End of

Year

  
                                 

Year ended December 31, 2022 Allowance for Doubtful Accounts

   $ 213,785     $ 360,000     $ -     $ 573,785  

Year ended December 31, 2021 Allowance for Doubtful Accounts

   $ 1,733,785     $ 200,000     $ (1,720,000 )   $ 213,785  
Notes Receivable [Member]    
Notes Tables    
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]  
   

December 31,

    

December 31,

  
   

2022

    

2021

  
                 

Note receivable

   $ 195,000     $ 295,000  

Repayment of note

     (9,000 )     -  

Allowance for doubtful account

     (186,000 )     (100,000

)

Note receivable, net of allowance

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