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Convertible Notes (Schedule of Notes) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Nov. 17, 2017
--- | --- | --- | ---
Debt instrument |  |  |
Less current portion | $ 10,378 | $ 163,687 |
1.375% Convertible senior notes due 2023 | Convertible senior notes |  |  |
Debt instrument |  |  |
Face value | 10,381 | 172,500 | $ 172,500
Unamortized discount | 0 | (8,266) |
Unamortized debt issuance costs | (3) | (547) |
Total convertible notes | 10,378 | 163,687 |
Less current portion | 10,378 | 163,687 |
Total long-term convertible notes | $ 0 | $ 0 |

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