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Note F - Note Receivable - Summary of Note Receivable (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2020
Note receivable	$ 0	$ 195,000
Repayment of note	0	(9,000)
Allowance for doubtful account	0	(186,000)
Note receivable, net of allowance	0	0
Current portion, net of allowance	0	0	$ 295,000
Noncurrent portion, net of allowance	$ 0	$ 0

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