CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2022	90,891,000
Beginning balance, Redeemable Convertible Preferred Stock at Dec. 31, 2022	$ 255,127
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Mar. 31, 2023	90,891,000
Ending balance, Redeemable Convertible Preferred Stock at Mar. 31, 2023	$ 255,127
Beginning balance, shares outstanding (in shares) at Dec. 31, 2022		40,629,000
Beginning balance at Dec. 31, 2022	(85,292)	$ 4	$ 14,051	$ (229)	$ (99,118)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options (in shares)		54,000
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options	553		553
Repurchase of common stock upon termination (in shares)		(125,000)
Warrants contra revenue	55		55
Stock-based compensation	1,997		1,997
Unrealized losses on marketable securities	208			208
Net loss	(17,454)				(17,454)
Ending balance, shares outstanding (in shares) at Mar. 31, 2023		40,558,000
Ending balance at Mar. 31, 2023	$ (99,933)	$ 4	16,656	(21)	(116,572)
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2023	90,891,000
Beginning balance, Redeemable Convertible Preferred Stock at Dec. 31, 2023	$ 255,127
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of redeemable convertible preferred stock into common stock in connection with initial public offering (in shares)	(90,891,000)
Conversion of redeemable convertible preferred stock into common stock in connection with initial public offering	$ (255,127)
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Mar. 31, 2024	0
Ending balance, Redeemable Convertible Preferred Stock at Mar. 31, 2024	$ 0
Beginning balance, shares outstanding (in shares) at Dec. 31, 2023	42,046,000	42,046,000
Beginning balance at Dec. 31, 2023	$ (97,701)	$ 4	27,411	259	(125,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable convertible preferred stock into common stock in connection with initial public offering (in shares)		90,891,000
Conversion of redeemable convertible preferred stock into common stock in connection with initial public offering	255,127	$ 9	255,118
Issuance of common stock in connection with initial public offering, net of offering costs, underwriting discounts and commissions (in shares)		19,759,000
Issuance of common stock in connection with initial public offering, net of offering costs, underwriting discounts and commissions	$ 665,990	$ 2	665,988
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options (in shares)	14,000	14,000
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options	$ 916		916
Issuance of common stock upon vesting of restricted stock units, net of shares withheld for employee taxes (in shares)		3,336,000
Issuance of common stock upon vesting of restricted stock units	1	$ 1
Shares of common stock withheld related to net settlement of restricted stock units (in shares)		(559,000)
Shares of common stock withheld related to net settlement of restricted stock units	(20,111)		(20,111)
Repurchase of common stock upon termination (in shares)		(16,000)
Repurchase of common stock upon termination	(3)		(3)
Warrants contra revenue	110		110
Stock-based compensation	97,768		97,768
Unrealized losses on marketable securities	(318)			(318)
Net loss	$ (92,995)				(92,995)
Ending balance, shares outstanding (in shares) at Mar. 31, 2024	155,471,000	155,471,000
Ending balance at Mar. 31, 2024	$ 808,784	$ 16	$ 1,027,197	$ (59)	$ (218,370)