Collaboration Agreements - Additional Information (Details)	1 Months Ended	3 Months Ended
	Nov. 30, 2017 USD ($) TargetAntigen Milestone	Mar. 31, 2023 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of target antigens against which antibodies are to be identified and selected | TargetAntigen	2
Revenue		$ 550,000
Surface Oncology, Inc.
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Number of target antigens against which antibodies are to be identified and selected | TargetAntigen	2
Upfront payments fee received	$ 250,000
Number of designated milestones | Milestone	4
Revenue		500,000
Surface Oncology, Inc. | Achievement of Milestone Event
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Revenue		$ 500,000