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Note 6 - Renewable Energy Tax Credit Investment (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023
Amortization of Solar Energy Tax Credit Investment | $ 337,000 |  |  | $ 842,000 |
Income Tax Credits and Adjustments |  | $ 425,000 | $ 0 | 1,000,000 |
Financial Standby Letter of Credit [Member] |  |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 2,000,000 |  |  | 2,000,000 |
Investment Tax Credit Carryforward [Member] |  |  |  |  |
Tax Credit, Committed Investment in the Tax Credit Producing Entity | $ 1,500,000 |  |  | $ 1,500,000 | $ 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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