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Note 7 - Debt, Credit Agreement and Leases (Details Textual) - USD ($) $ in Millions |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 21, 2022 | Mar. 31, 2025 | Dec. 31, 2024 | May 03, 2024
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility, commitment fee percentage |  | 6.70% |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Letters of credit outstanding, amount |  | $ 6.6 |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate | 0.50% |  |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 150.0
Line of credit facility, commitment fee percentage | 0.45% |  |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 2.00% |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.00% |  |
Debt instrument, basis spread on variable rate, applicable margin | 1.00% |  |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Leverage Ratio Applicable Margin [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, participation fee, percent | 2.00% |  |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 225.0
Line of credit facility, commitment fee percentage | 0.7875% |  |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 3.50% |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 2.50% |  |
New Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Leverage Ratio Applicable Margin [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, participation fee, percent | 3.50% |  |  |
New Credit Agreement [Member] | Letter of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Letters of credit, drawn amount |  | $ 43.0 |  |
Senior Notes [Member] | New Credit Agreement [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Letters of credit, drawn amount |  | $ 225.0 |  |
Senior Notes [Member] | IQ Notes [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, interest rate, stated percentage |  | 7.25% | 7.25% |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any 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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