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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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