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Note 3 - Long-term Debt (Details Textual) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Line of Credit Facility, Maximum Borrowing Capacity | $ 30.0 |  |
Letters of Credit Outstanding, Amount | 20.7 | $ 16.1 |
Line of Credit Facility, Remaining Borrowing Capacity | $ 9.3 |  |
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 | $ 80.0
Credit Facility [Member] |  |  |
Long-Term Debt, Weighted Average Interest Rate, at Point in Time | 8.50% |  |

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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 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 The maximum amount for a waiver to pay for dividends as part of a line of credit facility. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + 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 -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Weighted average interest rate of long-term debt outstanding calculated at point in time. + References No definition available. + Details
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- Details
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