Liquidity - Additional Information (Detail) - USD ($)			1 Months Ended	3 Months Ended						9 Months Ended		12 Months Ended
	May 09, 2024	Oct. 02, 2023	Mar. 31, 2022	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2022	Jul. 19, 2024	Dec. 31, 2023
Cash And Cash Equivalents [Line Items]
Net loss				$ (76,616,000)	$ (21,854,000)	$ (21,398,000)	$ (10,861,000)	$ (8,475,000)	$ (8,356,000)	$ (119,868,000)	$ (27,692,000)
Accumulated deficit				(396,278,000)						(396,278,000)				$ (276,410,000)
Cash and cash equivalents				48,413,000						48,413,000				$ 169,681,000
Marketable securities current				208,363,000						208,363,000
Long-term marketable securities				27,945,000						27,945,000
Net cash used in operating activities										(45,105,000)	(18,626,000)
Proceeds from sale of common stock, net of costs										148,955,000	$ 0
Securities Purchase Agreement [Member]
Cash And Cash Equivalents [Line Items]
Sale and issuance of warrants										10,000,000
Proceeds from warrant exercise										37,700,000
Exercisable warrants maximum aggregate exercise price				$ 12,300,000						12,300,000
Jefferies LLC [Member] | Maximum [Member]
Cash And Cash Equivalents [Line Items]
Aggregrate Offering Price													$ 150,000,000
Underwritten Public Offering [Member]
Cash And Cash Equivalents [Line Items]
Issuance of common stock (shares)	3,450,000	3,450,000	2,666,667
Proceeds from offering after deducting underwriting discount and other estimated offering expenses	$ 158,700,000	$ 69,000,000	$ 13,800,000
Underwriter discount and other offering expenses	$ 9,700,000
Price per unit	$ 46.00	$ 20.00	$ 3.75
Proceeds from warrant exercise										$ 0
Underwritten Public Offering [Member] | Securities Purchase Agreement [Member] | Maximum [Member]
Cash And Cash Equivalents [Line Items]
Proceeds from sale of common stock, net of costs												$ 60,000,000