Restructuring - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended			12 Months Ended
	Jun. 30, 2025	Oct. 31, 2024	Jan. 31, 2024	Aug. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Percentage of workforce eliminated				40.00%
Restructuring expense					$ 22.3	$ 33.4
Reversal of restructuring expense					0.5
Restructuring charges expected to be incurred					$ 32.9
Total Workforce [Member]
Restructuring Cost and Reserve [Line Items]
Percentage of workforce eliminated		33.00%
Research and Development Workforce [Member]
Restructuring Cost and Reserve [Line Items]
Percentage of workforce eliminated		55.00%	55.00%
Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 1.3
Restructuring charges expected to be incurred	$ 23.6