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Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Recent Accounting Pronouncements |  |
Accumulated deficit | $ (365,211) | $ (310,058)
Additional paid-in capital | 952,432 | 976,590
Deferred tax liability, net | $ 7,318 | 10,512
Accounting Standards Update 2020-06 | Adjustment |  |
Recent Accounting Pronouncements |  |
Accumulated deficit |  | (5,500)
Additional paid-in capital |  | (81,600)
Deferred tax liability, net |  | (2,200)
Convertible senior notes |  | $ 89,200

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