License and Collaboration Agreements - Summary of Research and Development Costs Related to Collaboration and License Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs	$ 57,751	$ 43,211	[1]
Collaboration and License Agreements
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs	3,117	3,449
Collaboration and License Agreements | Adimab
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs	46	1,318
Collaboration and License Agreements | Amber - MIT
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs	71	333
Collaboration and License Agreements | Apollo - Wistar
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs		355
Collaboration and License Agreements | Florentine - Tubigen
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs		912
Collaboration and License Agreements | Pearl - Taiho
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Research and development costs	$ 3,000	$ 531

[1] The shares and per share amounts for the year ended December 31, 2020 were derived from the consolidated financial statements as of that date and were retroactively adjusted as a result of the Reorganization and Reverse Stock Split. See Note 3 to the consolidated financial statements for additional details.