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Certain Balance Sheet Accounts - Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accrued expenses    
Employee compensation $ 6,017 $ 3,706
Interest payable 5,172 5,172
Clinical trials 4,573 2,430
Consulting and professional fees 3,179 7,455
Contract research and development 2,889 3,916
Sales rebates, fees and discounts 255 8,442
Other accrued expenses 1,395 2,013
Total accrued expenses $ 23,480 $ 33,134