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Note 12 - Convertible Senior Notes - Schedule of Interest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Amortization of debt issuance costs and premium | $ 296 | $ 315
The 5% Convertible Senior Notes Due 2024 [Member] |  |
Contractual interest expense | 397 | 1,059
Amortization of debt issuance costs and premium | 296 | 350
Total interest cost | $ 693 | $ 1,409
Effective interest rate | 1.00% | 5.30%

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