Nature of the Business and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Entity incorporated, in year	1995
Net loss	$ 33,407	$ 28,986	$ 133,816
Accumulated deficit	240,402		$ 206,995
Cash, cash equivalents and short-term and long-term marketable securities	$ 337,151