Subsequent Events	9 Months Ended	12 Months Ended
Sep. 30, 2025	Dec. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	12. Subsequent Events Restricted Stock Unit Issuance On October 2, 2025, the Company granted an aggregate of 1,340,971 restricted stock units (RSUs) to employees under the 2025 Plan as part of the Company’s merit-based equity compensation program. As of the grant date, the aggregate grant-date fair value of these awards was approximately $39.8 million. The RSUs vest over a four-year period, with 25% vesting on the first anniversary of the vesting commencement date, and the remainder vesting in equal quarterly installments over the following three years. Any unvested RSUs will be forfeited if employment terminates prior to the applicable vesting date.	16. Subsequent Events The Company performed a review of events subsequent to the balance sheet date through the date the consolidated financial statements are available to be issued on March 31, 2025, and has determined there are no such events that require disclosure except for the following: Reverse Stock Split On July 18, 2025, the Company effected a 1-for-28 reverse stock split (the Stock Split) of the Company’s issued and outstanding shares of common stock and options to purchase common stock. The Stock Split reduced the number of shares of the Company’s issued and outstanding common stock, as well as the numbers of shares underlying the RSUs and the numbers of shares reserved and available for future issuance and underlying outstanding options to purchase common stock. No fractional shares were distributed as a result of the reverse stock split, and stockholders were entitled to a cash payment in lieu of fractional shares. The Stock Split did not affect the par values per share or total authorized common stock. Accordingly, all share and per share amounts for all periods presented in the consolidated financial statements have been adjusted retroactively, where applicable, to reflect the Stock Split.

Subsequent Events

9 Months Ended

12 Months Ended

Sep. 30, 2025

Dec. 31, 2024

Subsequent Events [Abstract]

Subsequent Events

12. Subsequent Events

Restricted Stock Unit Issuance

On October 2, 2025, the Company granted an aggregate of 1,340,971 restricted stock units (RSUs) to employees under the

2025

Plan as part of the Company’s merit-based equity compensation program. As of the grant date, the aggregate grant-date fair value of these awards was approximately $39.8 million. The RSUs vest over a four-year period, with 25% vesting on the first

anniversary

of the vesting commencement date, and the remainder vesting in equal quarterly installments over the following three years. Any unvested RSUs will be forfeited if employment terminates prior to the applicable vesting date.

16. Subsequent Events

The Company performed a review of events subsequent to the balance sheet date through the date the consolidated financial statements are available to be issued on March 31, 2025, and has determined there are no such events that require disclosure except for the following:

Reverse Stock Split

On July 18, 2025, the Company effected a

1-for-28

reverse stock split (the Stock Split) of the Company’s issued and outstanding shares of common stock and options to purchase common stock. The Stock Split reduced the number of shares of the Company’s issued and outstanding common stock, as well as the numbers of shares underlying the RSUs and the numbers of shares reserved and available for future issuance and underlying outstanding options to purchase common stock. No fractional shares were distributed as a result of the reverse stock split, and stockholders were entitled to a cash payment in lieu of fractional shares. The Stock Split did not affect the par values per share or total authorized common stock. Accordingly, all share and per share amounts for all periods presented in the consolidated financial statements have been adjusted retroactively, where applicable, to reflect the Stock Split.