Equity Incentive Plans and Stock-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 7.7
Unrecognized compensation expense, period for recognition (in years)	2 years 2 months 12 days
Intrinsic value of options exercised	$ 0.1	$ 1.3
Weighted average grant date fair value (in dollars per share)	$ 0.82	$ 2.16
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend rate (as percent)	0.00%	0.00%
2021 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options available for grant (in shares)	29,341,567	23,784,439
Additional shares authorized (in shares)	18,672,200
Percentage of outstanding stock maximum	5.00%
Award expiration period (in years)	10 years
2021 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options available for grant (in shares)	5,518,072	4,508,360
Offering purchase period (in months)	6 months
Additional shares authorized (in shares)	3,734,500
Percentage of outstanding stock maximum	1.00%
2021 Employee Stock Purchase Plan \| Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, maximum employee subscription rate (as percent)	15.00%
Purchase price of common stock (as percent)	85.00%

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Purchase price of common stock expressed as a percentage of its fair value.

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