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]	Jun. 30, 2026	Dec. 31, 2025
Remaining Term [Member] \| June 2026 Options - Series A-1 & June 2026 Placement Agent Options [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Remaining term (in years)	5 years 3 months
Remaining Term [Member] \| June 2026 Options - Series A-2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Remaining term (in years)	2 years 29 days
Remaining Term [Member] \| January 2026 Options & January 2026 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 2 months 1 day
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)	1 year 7 months 17 days	2 years 1 month 17 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 2 months 1 day	1 year 8 months 1 day
Expected Volatility [Member] \| June 2026 Options - Series A-1 & June 2026 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	93.9	0
Expected Volatility [Member] \| June 2026 Options - Series A-2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Preferred investment options liability, measurement input	101.8	0
Expected Volatility [Member] \| January 2026 Options & January 2026 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	102.9	0
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	106.2	100.6
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	93.1	107.2
Risk-Free Interest Rate [Member] \| June 2026 Options - Series A-1 & June 2026 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	4.2	0
Risk-Free Interest Rate [Member] \| June 2026 Options - Series A-2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Preferred investment options liability, measurement input	4.1	0
Risk-Free Interest Rate [Member] \| January 2026 Options & January 2026 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	4.1	0
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	4.1	3.5
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	4	3.5
Expected Dividend Yield [Member] \| June 2026 Options - Series A-1 & June 2026 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] \| June 2026 Options - Series A-2 [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] \| January 2026 Options & January 2026 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] \| 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

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]