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Note N - Restructuring Activities - Changes in Liabilities (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Beginning Balance: $ 85 $ 958 $ 738 $ 553
Additions 0 97 0 1,528
Payments and adjustments (65) (421) (718) (1,447)
Ending Balance: 20 634 20 634
Contract Termination [Member]        
Beginning Balance: 0 0 0 0
Additions 0 0 0 0
Payments and adjustments 0 0 0 0
Ending Balance: 0 0 0 0
Employee Severance [Member]        
Beginning Balance: 85 937 738 549
Additions 0 113 0 1,527
Payments and adjustments (65) (421) (718) (1,447)
Ending Balance: 20 629 20 629
Facility, Asset Impairment and Other Expense [Member]        
Beginning Balance: 0 21 0 4
Additions   (16)   1
Payments and adjustments 0 0 0 0
Ending Balance: $ 0 $ 5 $ 0 $ 5