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Note D - Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Operating lease cost $ 1,393 $ 1,853 $ 4,393 $ 5,885
Amortization of right-of-use assets 39 49 126 147
Interest on lease liabilities 4 6 13 21
Total Finance lease cost 43 55 139 168
Variable lease cost 433 577 1,419 2,131
Sublease income (128) (117) (539) (475)
Total lease cost, net $ 1,741 $ 2,368 5,412 7,709
Operating cash flows from operating leases     10,995 11,179
Operating cash flows from finance leases     12 19
Financing cash flows from finance leases     $ 148 $ 169
Weighted Average Remaining Lease term, Operating leases (Year) 6 years 3 months 18 days 5 years 9 months 18 days 6 years 3 months 18 days 5 years 9 months 18 days
Weighted Average Remaining Lease term, Finance leases (Year) 1 year 7 months 6 days 2 years 3 months 18 days 1 year 7 months 6 days 2 years 3 months 18 days
Weighted Average Discount Rate, Operating leases 3.39% 3.50% 3.39% 3.50%
Weighted Average Discount Rate, Finance leases 5.60% 5.36% 5.60% 5.36%