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Note K - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Operating Loss Carryforwards, Valuation Allowance | $ 0 | $ 0
Percentage of Valuation Allowance | 100.00% |
Unrecognized Tax Benefits | $ 0 | 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 0 | 0
Domestic Tax Authority [Member] |  |
Operating Loss Carryforwards | 74,500,000 | 71,700,000
Operating Loss Carryforwards Subject to Expiration | 38,100,000 |
Operating Loss Carryforwards, Indefinite Lived | $ 36,400,000 |
Open Tax Year | 2020 2021 2022 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards | $ 63,300,000 | $ 60,500,000

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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-15 + Details
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