Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Convertible Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at Beginning at Dec. 31, 2022	$ (446,850)		$ 3	$ 21,430	$ (774)	$ (467,509)
Balance at Beginning at Dec. 31, 2022		$ 843,687
Balance at Beginning (in Shares) at Dec. 31, 2022			32,612
Balance at Beginning (in Shares) at Dec. 31, 2022		104,417
Issuance of common stock upon exercise of stock options	602			602
Issuance of common stock upon exercise of stock options, shares			219
Repurchase of unvested early exercised stock options			(123)
Vesting of restricted common stock	1,282			1,282
Unrealized gain (loss) on marketable securities	476				476
Stock-based compensation	2,195			2,195
Net loss	(35,625)					(35,625)
Balance at Ending at Mar. 31, 2023	(477,920)		$ 3	25,509	(298)	(503,134)
Balance at Ending at Mar. 31, 2023		$ 843,687
Balance at Ending (in Shares) at Mar. 31, 2023			32,708
Balance at Ending (in Shares) at Mar. 31, 2023		104,417
Balance at Beginning at Dec. 31, 2022	(446,850)		$ 3	21,430	(774)	(467,509)
Balance at Beginning at Dec. 31, 2022		$ 843,687
Balance at Beginning (in Shares) at Dec. 31, 2022			32,612
Balance at Beginning (in Shares) at Dec. 31, 2022		104,417
Unrealized gain (loss) on marketable securities	463
Net loss	(127,195)
Balance at Ending at Sep. 30, 2023	512,693		$ 15	1,107,693	(311)	(594,704)
Balance at Ending (in Shares) at Sep. 30, 2023			152,698
Balance at Beginning at Mar. 31, 2023	(477,920)		$ 3	25,509	(298)	(503,134)
Balance at Beginning at Mar. 31, 2023		$ 843,687
Balance at Beginning (in Shares) at Mar. 31, 2023			32,708
Balance at Beginning (in Shares) at Mar. 31, 2023		104,417
Issuance of common stock upon exercise of stock options	404			404
Issuance of common stock upon exercise of stock options, shares			114
Vesting of restricted common stock	125			125
Unrealized gain (loss) on marketable securities	(150)				(150)
Stock-based compensation	2,543			2,543
Net loss	(38,543)					(38,543)
Balance at Ending at Jun. 30, 2023	(513,541)		$ 3	28,581	(448)	(541,677)
Balance at Ending at Jun. 30, 2023		$ 843,687
Balance at Ending (in Shares) at Jun. 30, 2023			32,822
Balance at Ending (in Shares) at Jun. 30, 2023		104,417
Conversion of convertible preferred stock into common stock upon initial public offering	843,687	$ (843,687)	$ 10	843,677
Conversion of convertible preferred stock into common stock upon initial public offering, shares		(104,417)	104,417
Issuance of common stock upon initial public offering, net of offering costs	226,618		$ 1	226,617
Issuance of common stock upon initial public offering, net of offering costs, shares			14,710
Issuance of common stock upon exercise of stock options	1,511		$ 1	1,510
Issuance of common stock upon exercise of stock options, shares			537
Sale and issuance of common stock	810			810
Sale and issuance of common stock, Shares			127
Issuance of restricted common stock subject to repurchase			382
Forfeiture of restricted stock subject to repurchase			(297)
Vesting of restricted common stock	47			47
Unrealized gain (loss) on marketable securities	137				137
Stock-based compensation	6,451			6,451
Net loss	(53,027)					(53,027)
Balance at Ending at Sep. 30, 2023	512,693		$ 15	1,107,693	(311)	(594,704)
Balance at Ending (in Shares) at Sep. 30, 2023			152,698
Balance at Beginning at Dec. 31, 2023	469,076		$ 16	1,172,570	(76)	(703,434)
Balance at Beginning (in Shares) at Dec. 31, 2023			158,832
Issuance of common stock upon exercise of stock options	1,845			1,845
Issuance of common stock upon exercise of stock options, shares			525
Vesting of restricted common stock	41			41
Unrealized gain (loss) on marketable securities	(72)				(72)
Stock-based compensation	7,373			7,373
Net loss	(53,721)					(53,721)
Balance at Ending at Mar. 31, 2024	424,542		$ 16	1,181,829	(148)	(757,155)
Balance at Ending (in Shares) at Mar. 31, 2024			159,357
Balance at Beginning at Dec. 31, 2023	469,076		$ 16	1,172,570	(76)	(703,434)
Balance at Beginning (in Shares) at Dec. 31, 2023			158,832
Unrealized gain (loss) on marketable securities	181
Net loss	(184,968)
Balance at Ending at Sep. 30, 2024	320,739		$ 16	1,209,020	105	(888,402)
Balance at Ending (in Shares) at Sep. 30, 2024			160,480
Balance at Beginning at Mar. 31, 2024	424,542		$ 16	1,181,829	(148)	(757,155)
Balance at Beginning (in Shares) at Mar. 31, 2024			159,357
Issuance of common stock upon exercise of stock options	2,654			2,654
Issuance of common stock upon exercise of stock options, shares			598
Forfeiture of restricted stock subject to repurchase			(5)
Vesting of restricted common stock	34			34
Unrealized gain (loss) on marketable securities	(39)				(39)
Stock-based compensation	12,768			12,768
Net loss	(58,700)					(58,700)
Balance at Ending at Jun. 30, 2024	381,259		$ 16	1,197,285	(187)	(815,855)
Balance at Ending (in Shares) at Jun. 30, 2024			159,950
Issuance of common stock upon exercise of stock options	1,756			1,756
Issuance of common stock upon exercise of stock options, shares			541
Forfeiture of restricted stock subject to repurchase			(99)
Vesting of restricted stock units, shares			88
Vesting of restricted common stock	33			33
Unrealized gain (loss) on marketable securities	292				292
Stock-based compensation	9,946			9,946
Net loss	(72,547)					(72,547)
Balance at Ending at Sep. 30, 2024	$ 320,739		$ 16	$ 1,209,020	$ 105	$ (888,402)
Balance at Ending (in Shares) at Sep. 30, 2024			160,480