Condensed Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Common Stock Initial Public Offering	Additional Paid-in Capital	Additional Paid-in Capital Initial Public Offering	Accumulated Deficit	Series A-1 Redeemable Convertible Preferred Stock Preferred Stock	Series B Redeemable Convertible Preferred Stock Preferred Stock	Series C Redeemable Convertible Preferred Stock Preferred Stock	Series D Redeemable Convertible Preferred Stock Preferred Stock	Series E Redeemable Convertible Preferred Stock Preferred Stock	Series F Redeemable Convertible Preferred Stock Preferred Stock
Beginning balance, shares at Dec. 31, 2023							5,075,000	11,973,000	73,598,283	53,271,754	112,422,700	81,587,937
Beginning balance at Dec. 31, 2023							$ 3,570	$ 10,000	$ 22,000	$ 47,300	$ 120,000	$ 105,020
Beginning balance, shares at Dec. 31, 2023		5,222,283
Beginning balance at Dec. 31, 2023	$ (123,100)			$ 6,842		$ (129,942)
Conversion of redeemable convertible preferred stock, shares							(5,075,000)	(11,973,000)	(73,598,283)	(53,271,754)	(112,422,700)	(81,587,937)
Conversion of redeemable convertible preferred stock, value							$ (3,570)	$ (10,000)	$ (22,000)	$ (47,300)	$ (120,000)	$ (105,020)
Conversion of redeemable convertible preferred stock, shares		38,413,909
Conversion of redeemable convertible preferred stock, value	307,890	$ 4		307,886
Issuance of common stock, net of issuance costs, shares		60	23,000,000
Issuance of common stock, net of issuance costs	399,565		$ 3		$ 399,562
Stock-based compensation expense	1,517			1,517
Net loss	(16,934)					(16,934)
Ending balance, shares at Mar. 31, 2024		66,636,252
Ending balance at Mar. 31, 2024	568,938	$ 7		715,807		(146,876)
Beginning balance, shares at Dec. 31, 2024		76,154,783
Beginning balance at Dec. 31, 2024	$ 733,377	$ 8		951,350		(217,981)
Conversion of redeemable convertible preferred stock, shares	38,413,909
Conversion of redeemable convertible preferred stock, shares	38,413,909
Issuance of common stock, net of issuance costs, shares		66,506
Issuance of common stock, net of issuance costs	$ 682			682
Stock-based compensation expense	5,151			5,151
Net loss	(34,452)					(34,452)
Ending balance, shares at Mar. 31, 2025		76,221,289
Ending balance at Mar. 31, 2025	$ 704,758	$ 8		$ 957,183		$ (252,433)