Subsequent Events	9 Months Ended
Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events The Company has evaluated subsequent events from the balance sheet date through February 11, 2022, the date at which the condensed consolidated financial statements were available to be issued. GSK Collaboration On January 18, 2022, GSK elected to exercise its option to extend the exclusive target discovery period of the ongoing collaboration with the Company for an additional year to July 2023. The Company will receive a one-time payment of $50.0 million to extend the period. In addition, the Company elected to take a royalty option on its joint immuno-oncology antibody collaboration program with GSK targeting CD96 (GSK6097608, a.k.a. GSK’608). GSK will be solely responsible for GSK’608’s subsequent development in later-stage clinical trials, including full development costs moving forward.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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