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Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Proceeds from investment	$ 298,000		$ 298,000
Fair Value Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability measured and recognized at fair value			0	$ 0
Fair Value Measurements, Recurring \| Fair Value, Level 1 \| Treasury Bills
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents measured and recognized at fair value			28,900,000	83,000,000
Fair Value Measurements, Non-recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability measured and recognized at fair value			0	0
Fair Value Measurements, Non-recurring \| Fair Value, Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Conversion of convertible promissory note		$ 150,000
Privately-held investments measured at fair value			$ 200,000	$ 348,000