Summary of Significant Accounting Policies - Summary Of Reportable Segment (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Stock-based compensation	$ 154,273	$ 134,050	$ 91,400
Depreciation and amortization	10,285	8,976	7,572
Research and Development [Member]
Segment Reporting Information [Line Items]
Unallocated stock-based compensation expense	94,200	82,200	56,300
Stock-based compensation	94,230	82,211	56,279
General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Stock-based compensation	$ 60,043	$ 51,839	$ 35,121