Note D - Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lease, Cost, Total	$ 1,220	$ 1,281
Selling, General and Administrative Expenses [Member]
Lease, Cost, Total	$ 1,200	$ 1,300	$ 1,400