Note M - Leases (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Lease, Expense	$ 1,129,000	$ 1,076,000	$ 1,182,000
Operating Lease, Payments	$ 1,248,000	1,190,000	1,181,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	20 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.60%
Operating Lease, Lease Income, Lease Payments	$ 2,195,000	$ 1,971,000	$ 1,967,000