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Balance Sheet Disclosures - Other Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Accrued legal settlement $ 18,250 $ 0
Accrued compensation 11,243 15,161
Accrued variable consideration 10,082 5,025
Accrued professional fees 4,845 3,183
Accrued interest on convertible notes 4,169 1,369
Accrued other 177 52
Total other accrued liabilities $ 48,766 $ 24,790