Commitment and Contingencies - Additional Information (Details)			6 Months Ended
	Sep. 08, 2020 Debtinstrument	Jan. 21, 2020 Debtinstrument	Jun. 30, 2021 USD ($) $ / RNL	Nov. 18, 2015 USD ($)
Royalty-Linked Notes
Other Commitments [Line Items]
Debt instrument outstanding portion \| $ / RNL			0.04
Debt instrument maturity date			Dec. 31, 2045
Debt instrument, aggregate potential payment capped rate			4,000
Pfizer License Agreement \| Royalty-Linked Notes
Other Commitments [Line Items]
Debt instrument outstanding portion \| $ / RNL			0.04
Debt instrument maturity date			Dec. 31, 2045
Debt instrument price per unit			$ 160.00
Debt instrument, aggregate potential payment capped rate			4,000
Pfizer License Agreement \| Royalty-Linked Notes \| Private Placement
Other Commitments [Line Items]
Number of debt instruments within each notes \| Debtinstrument		2,579,400
Pfizer License Agreement \| Royalty-Linked Notes \| Rights Offering
Other Commitments [Line Items]
Number of debt instruments within each notes \| Debtinstrument	11,000
Pfizer License Agreement \| Minimum
Other Commitments [Line Items]
Potential future regulatory milestone and sales milestone payments upon achievement of net sales				$ 250,000,000.0
Pfizer License Agreement \| Maximum
Other Commitments [Line Items]
Potential future regulatory milestone and sales milestone payments upon achievement of net sales				$ 1,000,000,000.0