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+ Details

Collaboration Agreements - Additional Information (Details)	1 Months Ended	3 Months Ended	6 Months Ended
	Nov. 30, 2017 USD ($) TargetAntigen Milestone	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of target antigens against which antibodies are to be identified and selected \| TargetAntigen	2
Revenue		$ 232,000	$ 336,000	$ 550,000
Surface Oncology, Inc.
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Upfront payments fee received	$ 250,000
Number of designated milestones \| Milestone	4
Surface Oncology, Inc. \| Exclusive Product License
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue				$ 500,000