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Debt - Schedule of Debt (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Debt    
Principal $ 558,728,000 $ 451,120,000
Unaccreted Discount (115,366,000) (847,000)
Debt Issuance Costs (7,623,000) (8,508,000)
Carrying Value 435,739,000 441,765,000
Convertible senior notes, due 2026    
Debt    
Principal 225,000,000 425,000,000
Unaccreted Discount 0 0
Debt Issuance Costs (3,311,000) (8,508,000)
Carrying Value 221,689,000 416,492,000
Convertible senior notes, due 2028    
Debt    
Principal 333,334,000  
Unaccreted Discount (115,353,000)  
Debt Issuance Costs (4,312,000)  
Carrying Value 213,669,000  
Advance funding arrangement    
Debt    
Principal 94,000 15,670,000
Unaccreted Discount 0 (760,000)
Debt Issuance Costs 0 0
Carrying Value 94,000 14,910,000
Other notes    
Debt    
Principal 300,000 450,000
Unaccreted Discount (13,000) (87,000)
Debt Issuance Costs 0 0
Carrying Value $ 287,000 363,000
Term loan facility, due 2029    
Debt    
Principal   10,000,000
Unaccreted Discount   0
Debt Issuance Costs   0
Carrying Value   $ 10,000,000