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Note 6 - Renewable Energy Tax Credit Investment (Details Textual) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Amortization of Solar Energy Tax Credit Investment | $ 299,000 | $ 505,000 |
Income Tax Credits and Adjustments | 304,000 | $ 596,000 |
Financial Standby Letter of Credit [Member] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 4,000,000 |  | $ 276,000
Investment Tax Credit Carryforward [Member] |  |  |
Tax Credit, Committed Investment in the Tax Credit Producing Entity | $ 4,100,000 |  | $ 401,000

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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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