Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)		3 Months Ended	9 Months Ended
	Jun. 15, 2020	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Significant Accounting Policies [Line Items]
Transfers between fair value hierarchy levels		$ 0	$ 0
Acquired in-process research and development expense	$ 32,100,000			$ 32,057,000
Impairment losses on property and equipment		$ 61,000	61,000
Other comprehensive income (loss)			$ 0
ASU 2019-12
Schedule Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted		true	true
Change in accounting principle, accounting standards update, adoption date		Jan. 01, 2021	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect		true	true
Level 1
Schedule Of Significant Accounting Policies [Line Items]
Money market funds, at carrying value		$ 34,900,000	$ 34,900,000