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Basis of Presentation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Basis of Presentation              
Cash and cash equivalents $ 56,271       $ 56,271   $ 65,221
Accumulated deficit (625,688)       (625,688)   $ (590,598)
Net Income (Loss) $ (8,299) $ (26,791) $ (53,515) $ (52,796) (35,090) $ (106,311)  
Net cash used in operating activities         $ (40,880) $ (90,559)