Stock-Based Compensation - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2025	Dec. 31, 2024
Shares
Beginning balance (in shares)	21,941,495
Granted (in shares)	3,340,822
Cancelled (in shares)	(2,305,626)
Exercised (in shares)	(4,519,592)
Ending balance (in shares)	18,457,099	21,941,495
Exercisable (in shares)	10,189,094
Weighted-Average Exercise Price
Beginning balance (in dollars per share)	$ 5.40
Granted (in dollars per share)	7.08
Cancelled (in dollars per share)	8.81
Exercised (in dollars per share)	1.08
Ending balance (in dollars per share)	6.52	$ 5.40
Exercisable (in dollars per share)	$ 6.64
Options, outstanding, weighted average remaining contractual life	7 years 2 months 12 days	7 years 10 months 24 days
Options, exercisable, weighted average remaining contractual life	5 years 10 months 24 days
Options, outstanding, intrinsic value	$ 20,246	$ 62,685
Exercise, intrinsic value	24,350
Exercise, intrinsic value	$ 14,363

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.