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Fair Value - Significant Unobservable Inputs Utilized to Estimate Fair Value (Details) $ in Thousands | Dec. 31, 2025 yr | Sep. 30, 2025 yr | May 15, 2025 | Apr. 14, 2025 | Dec. 31, 2024 yr | Mar. 31, 2024 USD ($)
--- | --- | --- | --- | --- | --- | ---
Notes issued August 2022 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Notes principal | $ |  |  |  |  |  | $ 4,000
Notes issued June and July 2023 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Notes principal | $ |  |  |  |  |  | $ 2,000
Volatility |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Investment in debt securities - AFS, measurement input |  |  |  |  | 1.20 |
Earnout shares, measurement input | 0.6000 |  |  |  | 0.5600 |
Embedded derivative, measurement input |  | 0.7000 |  |  |  |
Embedded derivative asset, measurement input |  | 0.6000 |  |  |  |
Volatility | 2025 WTI Warrants |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Warrants, measurement input | 0.6000 |  |  |  |  |
Volatility | 2024 WTI Warrants |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Warrants, measurement input | 0.6000 |  |  |  | 0.5600 |
Time to liquidity |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Investment in debt securities - AFS, measurement input |  |  |  |  | 2,000 |
Earnout shares, measurement input | 5.8 |  |  |  | 6.8 |
Embedded derivative, measurement input |  | 4.25 |  |  |  |
Discount for lack of marketability |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Investment in debt securities - AFS, measurement input |  |  |  |  | 0.3100 |
Weighted average cost of capital |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Investment in debt securities - AFS, measurement input |  |  |  |  | 0.4500 |
Risk-free rate |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Investment in debt securities - AFS, measurement input |  |  |  |  | 0.0423 |
Earnout shares, measurement input | 0.0377 |  |  |  | 0.0442 |
Embedded derivative, measurement input |  | 0.0366 |  |  |  |
AeroFlexx yield |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Investment in debt securities - AFS, measurement input | 0.1701 |  |  |  |  |
Stock price |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Earnout shares, measurement input | 4.18 |  |  |  | 13.85 |
Embedded derivative, measurement input |  | 36.49 |  |  |  |
Embedded derivative asset, measurement input |  | 5.79 |  |  |  |
Stock price | 2025 WTI Warrants |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Warrants, measurement input | 4.18 |  |  |  |  |
Stock price | 2024 WTI Warrants |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Warrants, measurement input | 4.18 |  |  |  | 13.85 |
Revenue risk premium |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Earnout shares, measurement input | 0.2780 |  |  |  | 0.3610 |
Revenue volatility |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Earnout shares, measurement input | 1.5730 |  |  |  | 1.7600 |
Credit spread | 2025 WTI Warrants |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Warrants, measurement input | 0.2600 |  |  |  |  |
Credit spread | 2024 WTI Warrants |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Warrants, measurement input | 0.2600 |  |  |  | 0.1880 |
Discount Rate | Notes issued August 2022 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0.35
Discount Rate | Notes issued June and July 2023 due 2025 | Convertible debt | Minimum |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0.71
Discount Rate | Notes issued June and July 2023 due 2025 | Convertible debt | Maximum |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0.87
Financing | Notes issued August 2022 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 1
Financing | Notes issued June and July 2023 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 1
Change in control | Notes issued August 2022 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0
Change in control | Notes issued June and July 2023 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0
Other | Notes issued August 2022 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0
Other | Notes issued June and July 2023 due 2025 | Convertible debt |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  |  |  |  | 0
Debt yield |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative, measurement input |  |  | 0.426 | 0.445 |  |
Embedded derivative asset, measurement input |  | 0.3870 |  |  |  |
Debt spread |  |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |  |
Embedded derivative asset, measurement input |  | 0.3500 |  |  |  |

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