CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (Loss) Income	Accumulated Deficit	Redeemable Convertible Preferred Stock
Beginning balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2021						82,603
Beginning balance, Redeemable Convertible Preferred Stock at Dec. 31, 2021						$ 86,689
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series D preferred stock, net of issuance costs (in shares)						7,375
Issuance of Series D preferred stock, net of issuance costs						$ 149,866
Exchange of common stock to Series D preferred stock (in shares)						913
Exchange of common stock to Series D preferred stock						$ 18,572
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2022						90,891
Ending balance, Redeemable Convertible Preferred Stock at Dec. 31, 2022						$ 255,127
Beginning balance, shares outstanding (in shares) at Dec. 31, 2021		39,572
Beginning balance at Dec. 31, 2021	$ (39,763)	$ 4	$ 1,006	$ 0	$ (40,773)
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)		2,041
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options	1,341		1,341
Repurchase of common stock upon termination (in shares)		(71)
Repurchase of common stock upon termination	(303)		(303)
Exchange of common stock to Series D preferred stock (in shares)		(913)
Exchange of common stock to Series D preferred stock	(18,572)		(18,572)
Stock-based compensation	30,235		30,235
Warrants contra revenue	344		344
Unrealized (losses) gains on marketable securities	(229)			(229)
Net loss	(58,345)				(58,345)
Ending balance, shares outstanding (in shares) at Dec. 31, 2022		40,629
Ending balance at Dec. 31, 2022	$ (85,292)	$ 4	14,051	(229)	(99,118)
Ending balance, Redeemable Convertible Preferred Stock (in shares) at Dec. 31, 2023	90,891					90,891
Ending balance, Redeemable Convertible Preferred Stock at Dec. 31, 2023	$ 255,127					$ 255,127
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)		1,624
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options	2,050		2,050
Repurchase of common stock upon termination (in shares)		(207)
Repurchase of common stock upon termination	(174)		(174)
Stock-based compensation	10,679		10,679
Warrants contra revenue	805		805
Unrealized (losses) gains on marketable securities	488			488
Net loss	$ (26,257)				(26,257)
Ending balance, shares outstanding (in shares) at Dec. 31, 2023	42,046	42,046
Ending balance at Dec. 31, 2023	$ (97,701)	$ 4	27,411	259	(125,375)
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)
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 Dec. 31, 2024	0					0
Ending balance, Redeemable Convertible Preferred Stock at Dec. 31, 2024	$ 0					$ 0
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
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
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)	4,682	4,682
Issuance of common stock upon exercise of stock options and vesting of early exercised stock options	$ 5,670		5,670
Issuance of common stock upon vesting of restricted stock units (in shares)		5,103
Issuance of common stock upon vesting of restricted stock units	1	$ 1
Shares issued under employee stock purchase plan (in shares)		136
Shares issued under employee stock purchase plan	4,160		4,160
Shares of common stock withheld related to net settlement of restricted stock units (in shares)		(559)
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)		(40)
Repurchase of common stock upon termination	(1,066)		(1,066)
Stock-based compensation	234,588		234,588
Warrants contra revenue	1,395		1,395
Unrealized (losses) gains on marketable securities	167			167
Net loss	$ (83,421)				(83,421)
Ending balance, shares outstanding (in shares) at Dec. 31, 2024	162,018	162,018
Ending balance at Dec. 31, 2024	$ 964,799	$ 16	$ 1,173,153	$ 426	$ (208,796)