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Note 12 - Convertible Senior Notes - Schedule of Interest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Amortization of debt issuance costs | $ 315 | $ 306
The 2024 Notes and 2026 Notes [Member] |  |
Contractual interest expense | 1,059 | 1,006
Amortization of debt issuance costs | 350 | 204
Total interest cost | $ 1,408 | $ 1,210
Effective interest rate | 5.30% | 5.10%

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