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Investments in Marketable Securities - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Abstract]      
Proceeds from sales of available-for-sale securities $ 0 $ 0 $ 0