Stock-based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Shares
Expired (in shares)	(75,582)
Weighted Average Exercise Price
Expired (in dollars per share)	$ 12.42
Stock Options
Shares
Outstanding, beginning of period (in shares)	8,403,694
Granted (in shares)	4,424,417
Exercised (in shares)	0
Forfeited (in shares)	(127,994)
Outstanding, end of period (in shares)	12,624,535	8,403,694
Vested and expected to vest (in shares)	12,624,535
Exercisable (in shares)	4,096,257
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 8.37
Granted (in dollars per share)	2.52
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	2.79
Outstanding, end of period (in dollars per share)	6.35	$ 8.37
Vested and expected to vest (in dollars per share)	6.35
Exercisable (in dollars per share)	$ 13.87
Stock Options Additional Disclosures
Remaining contractual life (years)	8 years 21 days	7 years 7 months 24 days
Vested and expected to vest (years)	8 years 21 days
Exercisable, remaining contractual life (years)	5 years 11 months 15 days
Aggregate intrinsic value	$ 3,164	$ 1,395
Vested and expected to vest	3,164
Exercisable, aggregate intrinsic value	$ 630

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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