Commitments and Contingent Liabilities - Narrative (Details)	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 30, 2023 USD ($)	Jan. 31, 2023 USD ($) ft²	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)
Other Commitments [Line Items]
Research and development			$ 76,382,000	$ 30,030,000	$ 134,414,000	$ 197,950,000
Unrecorded unconditional purchase obligation			87,900,000		87,900,000			$ 142,300,000
Loss on contract termination			14,300,000
Office space leased (in square feet) | ft²		10,012
Term of contract				65 months		65 months
Renewal term		3 years
Monthly payments		$ 30,500
Annual rent increase		3.00%
Rent abatement, term		6 months
Security deposit			34,000		34,000			34,000
Operating lease right-of-use asset		$ 1,300,000	1,101,000		1,101,000			1,195,000
Operating lease liability, non-current		$ 1,300,000	$ 1,069,000		1,069,000			$ 1,194,000
Operating lease costs (less than)					$ 200,000	$ 100,000
Weighted average remaining lease term			50 months		50 months
Discount rate			12.00%		12.00%
Lease liability measurement (less than)					$ 200,000
Affibody | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Other Commitments [Line Items]
Research and development	$ 15,000,000.0						$ 25,000,000.0