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Intangible Assets and Goodwill (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Intangible Assets, Net      
Amortization expense $ 22,500,000 $ 21,500,000 $ 21,500,000
Amortization Expense      
2024 22,817,000    
2025 22,817,000    
2026 22,817,000    
2027 22,817,000    
2028 22,817,000    
Thereafter 9,460,000    
Changes to carrying amount of goodwill      
Changes to the carry amount of goodwill $ 0 0  
Licensed IP      
Intangible assets      
Weighted- Average Useful Lives (Years) 12 years 6 months    
Finite-lived intangible assets:      
Gross Carrying Amount $ 271,000,000 271,000,000  
Accumulated Amortization 163,318,000 141,781,000  
Net Carrying Amount $ 107,682,000 129,219,000  
Capitalized milestone payments      
Intangible assets      
Weighted- Average Useful Lives (Years) 13 years 3 months 18 days    
Finite-lived intangible assets:      
Gross Carrying Amount $ 17,000,000 0  
Accumulated Amortization 1,137,000 0  
Net Carrying Amount $ 15,863,000 $ 0