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Note 12 - Fair Value Measurements (Details Textual) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-Sale, Amortized Cost	$ 16.4
Debt Security Interest Rate Stated Percentage	7.50%
Debt Securities, Available-for-Sale, Current	$ 0.8	$ 0.7
Debt Securities, Available-for-Sale, Noncurrent	11.8	12.6
Debt Security, Available-For-Sale, Fair Value Discount Amount	1.8	2.0
Prepaid Expenses and Other Current Assets [Member]
Debt Securities, Available-for-Sale, Current	0.8	0.7
Other Noncurrent Assets [Member]
Debt Securities, Available-for-Sale, Noncurrent	$ 11.8	$ 12.6
Measurement Input, Discount Rate [Member]
Debt Securities, Available-for-Sale, Measurement Input	0.13	0.124

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Amount of fair value discount on available-for-sale debt securities.

+ References

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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
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+ References

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-Topic 820
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