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Convertible Notes (Schedule of Notes) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Nov. 17, 2017
--- | --- | --- | --- | ---
Debt instrument |  |  |  |
Less current portion | $ 0 |  | $ 10,378 |
Convertible senior notes | 1.375% Convertible senior notes due 2023 |  |  |  |
Debt instrument |  |  |  |
Face value |  |  | 10,381 | $ 172,500
Unamortized debt issuance costs |  |  | (3) |
Total convertible notes |  | $ 10,400 | 10,378 |
Less current portion |  |  | 10,378 |
Total long-term convertible notes |  |  | $ 0 |

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