Restructuring - Schedule of Changes in Restructuring Liability (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		$ 5,606
Accrued Expenses and Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Remaining liability included in accrued expenses and other current liabilities	$ 154
Accrued Expense and Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	5,606
Less: stock-based compensation	(261)
Cash payments made through September 30, 2024	$ (5,191)