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Fair Value Measurements - Narrative (Details) shares in Millions | Aug. 29, 2023 USD ($) shares | Dec. 31, 2023 USD ($) shares | Nov. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Apr. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) shares | Nov. 30, 2022 USD ($)
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Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Warrants outstanding (in shares) | shares |  |  |  |  |  | 49.1 |
Warrants |  |  |  |  |  |  | $ 48,300,000
Thermo Capital Partners LLC | Related Party |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Number of securities called by warrants (in shares) | shares |  | 10.0 |  |  |  |  |
Partnership agreement, advancement guarantee |  | $ 25,000,000 |  |  |  |  |
Thermo Capital Partners LLC | Related Party | Common Stock Warrant, Vesting Upon Effectiveness Of Guaranty |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Warrants outstanding (in shares) | shares |  | 5.0 |  |  |  |  |
Thermo Capital Partners LLC | Related Party | Common Stock Warrant, Vesting Upon Advances Achievement |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Warrants outstanding (in shares) | shares |  | 5.0 |  |  |  |  |
Thermo Capital Partners LLC | Related Party | Common Stock Warrant, Vesting Upon Advances Achievement | Estimate of fair value |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Warrants |  | $ 0 |  |  |  |  |
XCOM Labs, Inc. |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Business combination, equity interest issued (in shares) | shares | 60.6 |  |  |  |  |  |
XCOM Labs, Inc. | Common Stock |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Business combination, equity interest issued (in shares) | shares | 41.8 |  |  |  |  |  |
Equity issued in business combination, fair value | $ 51,400,000 |  |  |  |  |  |
XCOM Labs, Inc. | Common Stock, Restricted |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Business combination, equity interest issued (in shares) | shares | 18.8 |  |  |  |  |  |
Equity issued in business combination, fair value | $ 19,000,000 |  |  |  |  |  |
2023 Funding Agreement |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Debt instrument, fair value |  |  | $ 24,300,000 |  | $ 76,000,000 |  |
2023 Funding Agreement, Thermo Guarantee |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Debt instrument, fair value |  |  | $ 2,000,000 |  | $ 6,900,000 |  |
2021 Funding Agreement |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Debt instrument, fair value |  |  |  | $ 76,300,000 |  |  |
Underlying Stock Price and Exercise Price | XCOM Labs, Inc. | Common Stock |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Fair Value of Consideration | 1.23 |  |  |  |  |  |
Underlying Stock Price and Exercise Price | XCOM Labs, Inc. | Common Stock, Restricted |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Fair Value of Consideration | 1.13 |  |  |  |  |  |
2023 Funding Agreement |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Embedded derivative, fair value |  | $ 1,300,000 |  |  |  |  |
2023 Funding Agreement | Discount rate |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Derivative liability, measurement input |  | 0.0651 | 0.0914 |  | 0.0852 |  |
2019 Facility Agreement |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Embedded derivative, fair value |  | $ 0 |  |  |  | $ 100,000 |
Embedded derivative liability |  | $ 0 |  |  |  |  |
2019 Facility Agreement | Level 3 |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Embedded derivative liability |  |  |  |  |  | $ 100,000 |
2023 Funding Agreement, Thermo Guarantee | Discount rate |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Derivative liability, measurement input |  |  | 0.0672 |  | 0.0622 |  |
2021 Funding Agreement | Discount rate |  |  |  |  |  |  |
Fair Value Measurements [Line Items] |  |  |  |  |  |  |
Derivative liability, measurement input |  |  |  | 0.0852 |  |  |

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