Fair Value Measurements - Significant Inputs Used in Fair Value Measurements (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 5,900
Regulatory Milestones
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 500
Regulatory Milestones | Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.022
Regulatory Milestones | Minimum | Probability of payment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.018
Regulatory Milestones | Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.044
Regulatory Milestones | Maximum | Probability of payment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.200
Regulatory Milestones | Weighted Average | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.024
Regulatory Milestones | Weighted Average | Probability of payment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.167
Royalties
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 5,400
Royalties | Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.115
Royalties | Minimum | Probability of payment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.018
Royalties | Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.115
Royalties | Maximum | Probability of payment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.200
Royalties | Weighted Average | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.115
Royalties | Weighted Average | Probability of payment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.180