Balance Sheet Components - Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Receivables, Net, Current [Abstract]
Net product receivables	$ 4,473	$ 0
Collaboration receivables	2,354	17,764
Total accounts receivable, net	$ 6,827	$ 17,764

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Name:	us-gaap_AccountsReceivableNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant