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Note 9 - Fair Value Measurements (Details Textual) $ in Millions	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-Sale, Amortized Cost	$ 16.4
Debt Security Interest Rate Stated Percentage	7.50%
Debt Security, Available-For-Sale, Fair Value Discount Amount	$ 1.9	$ 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	$ 12.4	$ 12.6
Measurement Input, Discount Rate [Member]
Debt Securities, Available-for-Sale, Measurement Input	0.123	0.124

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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).

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