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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%

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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