Note D - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating lease cost	$ 1,366	$ 1,419	$ 2,822	$ 3,000
Amortization of right-of-use assets	40	41	80	87
Interest on lease liabilities	2	4	4	9
Total Finance lease cost	42	45	84	96
Variable lease cost	486	447	988	986
Sublease income	(213)	(160)	(499)	(411)
Total lease cost, net	$ 1,681	$ 1,751	3,395	3,671
Operating cash flows from operating leases			6,453	7,097
Operating cash flows from finance leases			4	8
Financing cash flows from finance leases			$ 95	$ 101
Weighted Average Remaining Lease term, Operating leases (Year)	5 years 7 months 6 days	6 years 2 months 12 days	5 years 7 months 6 days	6 years 2 months 12 days
Weighted Average Remaining Lease term, Finance leases (Year)	1 year 2 months 12 days	1 year 9 months 18 days	1 year 2 months 12 days	1 year 9 months 18 days
Weighted Average Discount Rate, Operating leases	3.63%	3.40%	3.63%	3.40%
Weighted Average Discount Rate, Finance leases	6.21%	5.53%	6.21%	5.53%