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Note 6 - Renewable Energy Tax Credit Investment (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Amortization of Solar Energy Tax Credit Investment | $ 335,000 | $ 997,000 | $ 1,200,000 | $ 997,000 |
Income Tax Credits and Adjustments | 443,000 | $ 1,100,000 | 1,500,000 | $ 1,100,000 |
Financial Standby Letter of Credit [Member] |  |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 1,900,000 |  | 1,900,000 |  |
Investment Tax Credit Carryforward [Member] |  |  |  |  |
Tax Credit, Committed Investment in the Tax Credit Producing Entity | $ 1,100,000 |  | $ 1,100,000 |  | $ 306,000

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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of solar energy tax credit investment. + References No definition available. + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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