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Investments and Fair Value Instruments - Summary of Preferred Investment Option Liabilities Measured and Recorded on Recurring Basis using Black-Scholes Model (Detail) - Level 3 [Member]
Sep. 30, 2025
Dec. 31, 2024
Remaining Term [Member] | March 2023 Options - Series A & March 2023 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Remaining term (in years) 2 years 4 months 20 days 3 years 1 month 20 days
Remaining Term [Member] | August 2022 Options & August 2022 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Remaining term (in years) 1 year 11 months 1 day 2 years 8 months 1 day
Expected Volatility [Member] | March 2023 Options - Series A & March 2023 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Preferred investment options liability, measurement input 90.5 101.7
Expected Volatility [Member] | August 2022 Options & August 2022 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Preferred investment options liability, measurement input 94.3 95.9
Risk-Free Interest Rate [Member] | March 2023 Options - Series A & March 2023 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Preferred investment options liability, measurement input 3.6 4.3
Risk-Free Interest Rate [Member] | August 2022 Options & August 2022 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Preferred investment options liability, measurement input 3.6 4.3
Expected Dividend Yield [Member] | March 2023 Options - Series A & March 2023 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Preferred investment options liability, measurement input 0 0
Expected Dividend Yield [Member] | August 2022 Options & August 2022 Placement Agent Options [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Preferred investment options liability, measurement input 0 0