Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2024	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Outstanding as of December 31, 2023	1,975
Outstanding Stock Options, Granted	940
Outstanding Stock Options, Exercised	0
Outstanding Stock Options, Forfeited	(296)
Outstanding Stock Options, Expired	(165)
Outstanding Stock Options as ofJune 30, 2024	2,454	1,975
Outstanding Stock Options, Exercisable as of June 30, 2024	1,378
Weighted- Average Exercise Price Per Share, Beginning Balance	$ 9
Weighted- Average Exercise Price Per Share, Granted	0.36
Weighted- Average Exercise Price Per Share, Exercised	0
Weighted- Average Exercise Price Per Share, Forfeited	8.83
Weighted- Average Exercise Price Per Share, Expired	11.39
Weighted- Average Exercise Price Per Share, Ending Balance	5.55	$ 9
Weighted- Average Exercise Price Per Share, Exercisable as of June 30, 2024	$ 8.4
Weighted Average Remaining Contractual Term, Outstanding	8 years 8 months 12 days	7 years 7 months 6 days
Weighted Average Remaining Contractual Term, Exercisable as of June 30, 2024	8 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding	$ 160	$ 604
Aggregate Intrinsic Value, Exercisable as of June 30, 2024	$ 63

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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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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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. 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 exercise price, at which grantee can acquire shares reserved for issuance, for 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 option holders acquired shares when converting their stock options into shares.

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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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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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