Note N - Restructuring Activities - Restructuring Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring expense	$ 0	$ 2,198
Employee Severance [Member]
Restructuring expense		204
Lease Impairment and Termination Charges [Member]
Restructuring expense		294
Capital Losses from Asset Disposal [Member]
Restructuring expense		10
Facility Closing [Member]
Restructuring expense		1,690
Facility, Asset Impairment and Other Expense [Member]
Restructuring expense		$ 1,994