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Convertible Senior Notes - Schedule of convertiable note interest expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Debt Disclosure [Abstract] |  |  |  |
Contractual interest expense | $ 269 | $ 269 | $ 539 | $ 539
Amortization of Debt Issuance Costs | 453 | 357 | 905 | 709
Amortization of debt discount | 0 | 2,508 | 0 | 4,986
Total | $ 722 | $ 3,134 | $ 1,444 | $ 6,234
Debt Instrument, Interest Rate, Effective Percentage | 1.00% | 5.10% | 1.00% | 5.10%

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