Note N - Restructuring Activities - Restructuring Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring expense	$ 0	$ 1,744	$ 0	$ 3,942
Employee Severance [Member]
Restructuring expense		1,209		1,413
Lease Impairment and Termination Charges [Member]
Restructuring expense		0		294
Capital Losses from Asset Disposal [Member]
Restructuring expense		(4)		6
Facility Closing [Member]
Restructuring expense		539		2,229
Facility, Asset Impairment and Other Expense [Member]
Restructuring expense		$ 535		$ 2,529