Fair Value Measurements - Fair Value Inputs, Liabilities, Quantitative Information (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liabilities	$ 13,500	$ 36,917
Revenue-based royalty | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liabilities	2,870	4,545
Revenue milestones | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liabilities	41,671	46,305
Regulatory approval | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration liabilities	$ 3,693	$ 4,900
Discount rate | Revenue-based royalty | Minimum | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.13	0.12
Discount rate | Revenue-based royalty | Maximum | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.16	0.15
Discount rate | Revenue-based royalty | Weighted Average | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.147	0.135
Discount rate | Revenue milestones | Minimum | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.075	0.075
Discount rate | Revenue milestones | Maximum | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.125	0.12
Discount rate | Revenue milestones | Weighted Average | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.082	0.090
Discount rate | Regulatory approval | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.026	0.01
Probability of milestone payment | Regulatory approval | Discounted Cash Flow | Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable inputs, contingent liability	0.80	1