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

December 31,

 
  

2023

  

2022

 
         

Accounts receivable

 $2,207,311  $2,096,569 

Allowance for doubtful accounts

  (1,005,785)  (573,785)

Accounts receivable, net of allowances for doubtful accounts

 $1,201,526  $1,522,784 
  

Balance at Beginning of Year

  

Charged to Costs and Expenses

  

Deductions from Reserves

  

Balance at End of Year

 
                 

Year ended December 31, 2023 Allowance for Doubtful Accounts

 $573,785  $750,000  $(318,000) $1,005,785 

Year ended December 31, 2022 Allowance for Doubtful Accounts

 $213,785  $360,000  $-  $573,785 
Notes Receivable [Member]  
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

December 31,

  

December 31,

 
  

2023

  

2022

 
         

Note receivable

 $-  $195,000 

Repayment of note

  -   (9,000)

Allowance for doubtful account

  -   (186,000)

Note receivable, net of allowance

  -   - 

Current portion, net of allowance

 $-  $- 

Noncurrent portion, net of allowance

 $-  $-