Marketable securities - Summary of Marketable Securities Held (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized cost / cost	$ 0	$ 70,494
Unrealized gains	0	0
Unrealized losses	0	(1,759)
Fair value	0	68,735
U.S. government agency securities and treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized cost / cost	0	67,970
Unrealized gains	0	0
Unrealized losses	0	(1,733)
Fair value	$ 0	66,237
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized cost / cost		2,524
Unrealized gains		0
Unrealized losses		(26)
Fair value		$ 2,498