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Fair Value of Financial Instruments - Summary of Assumptions used to Value Founder Shares Liability (Detail) - Founder Holder Earnout Shares Liability [Member]	Sep. 30, 2025
Exercise price | Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	400
Exercise price | Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	480
Expected volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	66.3
Risk-free interest rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	3.7
Remaining term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Remaining term	1 year 3 months 7 days
Dividend yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Liability, Measurement Input	0

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