Marketable securities and fair value measurements - Summary of marketable securities (Detail) - Fair Value, Recurring - U.S. treasury securities - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Amortized Cost	$ 108,763	$ 197,644
Gross Unrealized Gains	159	274
Fair Value	$ 108,922	$ 197,918

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details