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Note 23 - Renewable Energy Tax Credit Investment (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Amortization of Solar Energy Tax Credit Investment | $ 1,900,000 | $ 1,700,000
Income Tax Credits and Adjustments | 2,300,000 | 1,800,000
Financial Standby Letter of Credit [Member] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 276,000,000,000 | 2,000,000
Investment Tax Credit Carryforward [Member] |  |
Tax Credit, Committed Investment in the Tax Credit Producing Entity | $ 401,000,000,000 | $ 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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