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Fair Value of Financial Instruments (Details 2) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Debt instrument |  |
Carrying value | $ 49,248 | $ 163,687
1.375% Convertible senior notes due 2023 | Convertible senior notes |  |
Debt instrument |  |
Face value | 49,354 | 172,500
Carrying value | 49,248 | 163,687
Fair value | $ 71,625 | $ 254,103

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