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Note 3 - Long-term Debt (Details Textual) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Line of Credit Facility, Maximum Borrowing Capacity | $ 30.0 |  |
Letters of Credit Outstanding, Amount | 23.1 | $ 20.7 |
Line of Credit Facility, Remaining Borrowing Capacity | 6.9 |  |
Line of Credit Facility, Dividends Payment, Maximum | $ 150.0 |  |
Line Of Credit Facility Dividend Restrictions Percentage Of Net Income Limit |  | 25.00% |
Line of Credit Facility Dividend Restrictions Percentage of Net Income Limit1 |  |  | 25.00%
Line of Credit Facility, Waiver to Pay Dividends, Maximum |  |  | $ 80.0
Credit Facility [Member] |  |  |
Long-Term Debt, Weighted Average Interest Rate, at Point in Time | 7.50% |  |

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- Definition Line of credit facility dividend restrictions percentage of net income limit. + References No definition available. + Details
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- Definition The maximum amount of dividends that can be paid under the credit facility. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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