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Note H - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Depreciation | $ 19,700 | $ 22,600 | $ 24,800
Interest Paid, Capitalized, Investing Activities | $ 0 | $ 200 | $ 900

X
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- Definition Amount of cash paid for interest capitalized, classified as investing activity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-13 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-2 + Details
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