Fair Value of Financial Instruments - Summary of Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial assets carried at fair value:
Cash equivalents, fair value disclosure	$ 32,844	$ 16,243
Short-term investments, available for sale	339,056	118,853
Total financial assets	371,900	135,096
Level 1 [Member]
Financial assets carried at fair value:
Cash equivalents, fair value disclosure	19,398	5,617
Total financial assets	19,398	5,617
Level 2 [Member]
Financial assets carried at fair value:
Cash equivalents, fair value disclosure	13,446	10,626
Total financial assets	352,502	129,479
Commercial paper, available-for-sale [Member]
Financial assets carried at fair value:
Short-term investments, available for sale	90,828	43,780
Commercial paper, available-for-sale [Member] | Level 2 [Member]
Financial assets carried at fair value:
Short-term investments, available for sale	90,828	43,780
Corporate debt securities, available-for-sale [Member]
Financial assets carried at fair value:
Short-term investments, available for sale	98,339	71,359
Corporate debt securities, available-for-sale [Member] | Level 2 [Member]
Financial assets carried at fair value:
Short-term investments, available for sale	98,339	71,359
Government debt securities [Member]
Financial assets carried at fair value:
Short-term investments, available for sale	149,889	3,714
Government debt securities [Member] | Level 2 [Member]
Financial assets carried at fair value:
Short-term investments, available for sale	$ 149,889	$ 3,714