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Deferred Royalty Obligation - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
May 10, 2018
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Deferred royalty obligation, net   $ 124,503 $ 124,437
Interest expense   10,400 10,000
Royalty obligation payable   900 900
HealthCare Royalty Partners      
Debt Instrument [Line Items]      
Proceeds from royalty agreement $ 125,000    
Required payment for breach of agreement, payment two 225,000    
Required payment for breach of agreement, payment one 125,000    
HealthCare Royalty Partners | Royalty Financing Agreement | Loans Payable      
Debt Instrument [Line Items]      
Deferred royalty obligation, net 125,000 124,500 124,400
Debt issuance costs $ 700    
Unamortized debt discount   500 600
Accrued interest expense   29,800 22,700
Royalty payments   3,300 2,800
HealthCare Royalty Partners | Royalty Financing Agreement | Loans Payable | Other Noncurrent Liabilities      
Debt Instrument [Line Items]      
Accrued interest expense   $ 24,600 $ 19,100
HealthCare Royalty Partners | Period One      
Debt Instrument [Line Items]      
Maximum potential royalty payout 10.00%    
HealthCare Royalty Partners | Period Two      
Debt Instrument [Line Items]      
Increase in maximum potential payout percent 4.00%    
HealthCare Royalty Partners | Payout Period      
Debt Instrument [Line Items]      
Increase in maximum potential payout percent 4.00%