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Note 12 - Convertible Senior Notes - Schedule of Interest Expense (Details) - The 5% Convertible Senior Notes Due 2024 [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Contractual interest expense | $ 46 | $ 1,056 | $ 92 | $ 2,111
Amortization of debt issuance costs | 350 | 359 | 701 | 709
Total interest cost | $ 396 | $ 1,415 | $ 793 | $ 2,820
Effective interest rate | 1.00% | 5.30% | 1.00% | 5.30%

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