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Note 8 - Fair Value Measurements (Details Textual) $ in Millions | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Debt Securities, Available-for-Sale, Amortized Cost | $ 15.6 |
Debt Security Interest Rate Stated Percentage | 7.50% |
Debt Security, Available-For-Sale, Fair Value Discount Amount | $ 1.7 | $ 1.8
Prepaid Expenses and Other Current Assets [Member] |  |
Debt Securities, Available-for-Sale, Current | 0.8 | 0.8
Other Noncurrent Assets [Member] |  |
Debt Securities, Available-for-Sale, Noncurrent | $ 11.7 | $ 11.8
Measurement Input, Discount Rate [Member] |  |
Debt Securities, Available-for-Sale, Measurement Input | 0.126 | 0.13

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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