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Note 10 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
State | $ 257,000 | $ 190,000
Illinois Tax Authority [Member] |  |
State | $ 79,000 |

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- Definition Amount, after income tax refund received, of cash paid to state and local tax jurisdictions for tax on income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-2A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-22 + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |