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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
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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

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