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Subsequent Event - Additional Information (Details) - Biopharma Credit PLC and Biopharma Credit Investments V (Master) LP [Member] - December 2019 Term Loan [Member] $ in Millions	Sep. 24, 2020 USD ($)	Dec. 13, 2019 USD ($) Tranch	Nov. 02, 2020 USD ($)
Subsequent Event [Line Items]
Current borrowing capacity		$ 500.0
Number of tranches \| Tranch		2
Maturity date	Dec. 31, 2024	Dec. 20, 2023
Funding fee payable	2.95%
Tranche A [Member]
Subsequent Event [Line Items]
Current borrowing capacity		$ 250.0
Tranche B [Member]
Subsequent Event [Line Items]
Current borrowing capacity	$ 300.0	$ 250.0
Borrowing			$ 300.0