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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Payables and Accruals [Abstract]    
External research and development $ 8,424 $ 5,666
Payroll and employee related expenses 15,231 4,280
Manufacturing 4,596  
Accrued consulting and other professional fees 4,116 2,820
Rebates and other GTN adjustments 3,582  
Royalty payable 1,358  
Other accrued expenses 1,005 258
Total accrued expenses $ 38,312 $ 13,024