Subsequent Events	6 Months Ended
Jun. 30, 2026
Subsequent Events [Abstract]
Subsequent Events	10. Subsequent event On July 8, 2026, the Company repaid in full and terminated the Loan and Security Agreement, dated as of November 14, 2024, as amended (the Loan Agreement), by and among the Company, Alector LLC, a Delaware limited liability company, as co-borrower (together with the Company, the Borrowers), the several banks and other financial institutions or entities from time to time parties thereto, as lenders (collectively, referred to as the Lenders), and Hercules Capital, Inc., in its capacity as administrative agent and collateral agent for itself and the Lenders (Hercules). The Company repaid a total of $10.4 million aggregate principal amount of outstanding loans, plus accrued interest and end of term and prepayment charges thereon.

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
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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