Note M - Leases (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Lease, Expense	$ 1,348,000	$ 1,129,000	$ 1,076,000
Operating Lease, Payments	$ 1,421,000	1,248,000	1,190,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	19 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	4.80%
Operating Lease, Lease Income, Lease Payments	$ 2,281,000	$ 2,195,000	$ 1,971,000