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Note D - Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Operating lease cost $ 1,338 $ 1,393 $ 4,160 $ 4,393
Amortization of right-of-use assets 35 39 115 126
Interest on lease liabilities 2 4 6 13
Total Finance lease cost 37 43 121 139
Variable lease cost 537 433 1,525 1,419
Sublease income (177) (128) (676) (539)
Total lease cost, net $ 1,735 $ 1,741 5,130 5,412
Operating cash flows from operating leases     9,525 10,995
Operating cash flows from finance leases     6 12
Financing cash flows from finance leases     $ 144 $ 148
Weighted Average Remaining Lease term, Operating leases (Year) 5 years 7 months 6 days 6 years 3 months 18 days 5 years 7 months 6 days 6 years 3 months 18 days
Weighted Average Remaining Lease term, Finance leases (Year) 1 year 3 months 18 days 1 year 7 months 6 days 1 year 3 months 18 days 1 year 7 months 6 days
Weighted Average Discount Rate, Operating leases 3.56% 3.39% 3.56% 3.39%
Weighted Average Discount Rate, Finance leases 7.04% 5.60% 7.04% 5.60%