Note A - Summary of Accounting Policies - Stock Options Activity (Details) - $ / shares	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Outstanding, shares (in shares)		115,000	115,000
Outstanding. weighted average exercise price (in dollars per share)		$ 0.17	$ 0.17
Granted, shares (in shares)	0	25,432	0
Granted. weighted average exercise price (in dollars per share)		$ 0.25	$ 0
Exercised, shares (in shares)		0	0
Exercised. weighted average exercise price (in dollars per share)		$ 0	$ 0
Cancelled, shares (in shares)		0	0
Cancelled. weighted average exercise price (in dollars per share)		$ 0	$ 0
Outstanding, shares (in shares)	140,432	140,432	115,000
Outstanding. weighted average exercise price (in dollars per share)	$ 0.26	$ 0.26	$ 0.17
Options exercisable, shares (in shares)	140,432	140,432	115,000
Options exercisable. weighted average exercise price (in dollars per share)	$ 0.25	$ 0.25	$ 0.17