Note D - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating lease cost	$ 1,419	$ 1,913	$ 3,000	$ 4,032
Amortization of right-of-use assets	41	49	87	98
Interest on lease liabilities	4	8	9	15
Total Finance lease cost	45	57	96	113
Variable lease cost	447	634	986	1,554
Sublease income	(160)	(169)	(411)	(358)
Total lease cost, net	$ 1,751	$ 2,435	3,671	5,341
Operating cash flows from operating leases			7,097	7,637
Operating cash flows from finance leases			8	13
Financing cash flows from finance leases			$ 101	$ 112
Weighted Average Remaining Lease term, Operating leases (Year)	6 years 2 months 12 days	5 years 9 months 18 days	6 years 2 months 12 days	5 years 9 months 18 days
Weighted Average Remaining Lease term, Finance leases (Year)	1 year 9 months 18 days	2 years 6 months	1 year 9 months 18 days	2 years 6 months
Weighted Average Discount Rate, Operating leases	3.40%	3.53%	3.40%	3.53%
Weighted Average Discount Rate, Finance leases	5.53%	5.33%	5.53%	5.33%