Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	Oct. 31, 2021	Aug. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Commitments And Contingencies [Line Items]
Operating lease, weighted average remaining lease term			7 months 6 days
Operating lease expense				$ 0
San Diego, California
Commitments And Contingencies [Line Items]
Operating lease commencement date		Sep. 01, 2021
Operating lease term of contract		14 months
Operating lease, option to extend			There are no options to extend the term or early termination provisions.
Operating lease, existence of option to extend		false
Torrey Plaza
Commitments And Contingencies [Line Items]
Targeted lease commencement date	2022-07
Operating lease not yet commenced, term of contract	126 months
Operating lease not yet commenced renewal term	5 years
Operating lease not yet commenced, option to extend	true
Letter of credit	$ 800
Torrey Plaza | Letter of Credit [Member]
Commitments And Contingencies [Line Items]
Percentage of letter of credit subject to certain conditions	50.00%
Cell Line License Agreement | Wu Xi Biologics
Commitments And Contingencies [Line Items]
Non-refundable license fee paid			$ 200
Maximum payment to buy out royalty obligation			$ 15,000