Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2026	Jun. 30, 2025
Number of Shares
Beginning balance (in shares)	12,080,718
Granted (in shares)	3,860,000
Forfeited (in shares)	(84,654)
Ending balance (in shares)	15,856,064
Number of shares Options, Exercisable (in shares)	850,519
Number of shares Options, Vested and expected to vest (in shares)	12,771,903
Weighted Average Exercise Price
Beginning balance (in usd per share)	$ 2.34
Granted (in usd per share)	3.99
Forfeited (in usd per share)	19.73
Ending balance (in usd per share)	2.65
Weighted average exercise price, Exercisable (in usd per share)	8.52
Weighted average exercise price, Vested and expected to vest (in usd per share)	$ 2.72
Weighted average contractual term outstanding (in years)	9 years 4 months 24 days	9 years 7 months 6 days
Weighted average contractual term outstanding, Exercisable (in years)	9 years 1 month 6 days
Weighted average contractual term outstanding, Vested and expected to vest (in years)	9 years 4 months 24 days
Aggregate intrinsic value, Beginning balance	$ 28,329
Aggregate intrinsic value, forfeited and expired	0
Aggregate intrinsic value, Ending balance	30,395
Aggregate intrinsic value, exercisable	1,765
Aggregate intrinsic value, vested and expected to vest	$ 24,717

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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Period Type:	instant

- 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.