Note G - Stock-based Compensation - Performance Stock Units Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Vested, number of shares (in shares)	(69,110)	(4,146)
Vested, weighted average grant date fair value (in dollars per share)	$ 5.44
Performance Shares [Member]
Balance, number of shares (in shares)	94,110	32,268
Unvested shares outstanding, weighted average grant date fair value (in dollars per share)	$ 5.41	$ 4.14
Granted, number of shares (in shares)	117,000	75,000
Granted, weighted average grant date fair value (in dollars per share)	$ 7.77	$ 5.59
Vested, number of shares (in shares)		(13,158)
Vested, weighted average grant date fair value (in dollars per share)		$ 3.30
Forfeited, number of shares (in shares)	0	0
Forfeited, weighted average grant date fair value (in dollars per share)
Balance, number of shares (in shares)	142,000	94,110
Unvested shares outstanding, weighted average grant date fair value (in dollars per share)	$ 7.34	$ 5.41