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Related-Party Debt - Unobservable Assumptions (Detail) - Convertible Note - December 2024 Convertible Promissory Note - Affiliated Entity - Valuation Technique, Binomial Lattice Model	Jun. 30, 2026	Dec. 31, 2025
Expected market yield
Related Party Transaction [Line Items]
Measurement input	0.174	0.148
Expected volatility
Related Party Transaction [Line Items]
Measurement input	0.775	0.875

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