Fair Value Measurements - Additional information (Detail) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2023
AvenCell [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment Owned, Fair Value	$ 7.9	$ 7.9	$ 11.8
Sparing Vision [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment Owned, Fair Value	$ 14.6	$ 14.6