Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Series A Convertible Preferred Stock	Series B Convertible Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Convertible Preferred Stock, beginning balance at Dec. 31, 2023		$ 89,487	$ 77,091
Convertible Preferred Stock, beginning balance, shares at Dec. 31, 2023		100,182,354	51,273,790
Beginning balance at Dec. 31, 2023	$ (25,634)			$ 4	$ 19,796	$ 4	$ (45,438)
Beginning balance, shares at Dec. 31, 2023				4,170,817
Issuance of Series B convertible preferred stock for the settlement of the tranche right liability, net of issuance costs	7,343		$ 68,161		7,343
Issuance of Series B convertible preferred stock for the settlement of the tranche right liability, net of issuance costs, shares			38,157,240
Stock-based compensation expense	1,491				1,491
Net loss	(22,669)						(22,669)
Change in unrealized gain (loss) on investments, net of tax	(164)					(164)
Convertible Preferred Stock, ending balance at Mar. 31, 2024		$ 89,487	$ 145,252
Convertible Preferred Stock, ending balance, shares at Mar. 31, 2024		100,182,354	89,431,030
Ending balance at Mar. 31, 2024	(39,633)			$ 4	28,630	(160)	(68,107)
Ending balance, shares at Mar. 31, 2024				4,170,817
Convertible Preferred Stock, beginning balance at Dec. 31, 2023		$ 89,487	$ 77,091
Convertible Preferred Stock, beginning balance, shares at Dec. 31, 2023		100,182,354	51,273,790
Beginning balance at Dec. 31, 2023	(25,634)			$ 4	19,796	4	(45,438)
Beginning balance, shares at Dec. 31, 2023				4,170,817
Net loss	(40,790)
Change in unrealized gain (loss) on investments, net of tax	(187)
Ending balance at Jun. 30, 2024	(336,886)			$ 36	423,261	(183)	(86,228)
Ending balance, shares at Jun. 30, 2024				36,576,457
Convertible Preferred Stock, beginning balance at Dec. 31, 2023		$ 89,487	$ 77,091
Convertible Preferred Stock, beginning balance, shares at Dec. 31, 2023		100,182,354	51,273,790
Beginning balance at Dec. 31, 2023	(25,634)			$ 4	19,796	4	(45,438)
Beginning balance, shares at Dec. 31, 2023				4,170,817
Net loss	(78,300)
Ending balance at Dec. 31, 2024	$ 305,427			$ 37	429,657	(522)	(123,745)
Ending balance, shares at Dec. 31, 2024	36,580,202			36,580,202
Convertible Preferred Stock, beginning balance at Mar. 31, 2024		$ 89,487	$ 145,252
Convertible Preferred Stock, beginning balance, shares at Mar. 31, 2024		100,182,354	89,431,030
Beginning balance at Mar. 31, 2024	$ (39,633)			$ 4	28,630	(160)	(68,107)
Beginning balance, shares at Mar. 31, 2024				4,170,817
Conversion of Series A convertible preferred stock to common stock upon closing of the intial public offering	89,487	$ (89,487)		$ 12	89,475
Conversion of Series A convertible preferred stock to common stock upon closing of the intial public offering, shares		(100,182,354)		11,701,298
Conversion of Series B convertible preferred stock to common stock upon closing of the initial public offering	145,252		$ (145,252)	$ 10	145,242
Conversion of Series B Convertible Preferred Stock to Common Stock Upon Closing of the Initial Public Offering, Shares			(89,431,030)	10,445,518
Issuance of common stock from initial public offering, net of issuance costs	140,868			$ 9	140,859
Issuance of common stock from initial public offering, net of issuance costs, shares				9,200,000
Issuance of common stock from private placement, net of issuance cost	16,702			$ 1	16,701
Issuance of common stock from private placement, net of issuance cost, shares				1,058,824
Stock-based compensation expense	2,354				2,354
Net loss	(18,121)						(18,121)
Change in unrealized gain (loss) on investments, net of tax	(23)					(23)
Ending balance at Jun. 30, 2024	(336,886)			$ 36	423,261	(183)	(86,228)
Ending balance, shares at Jun. 30, 2024				36,576,457
Beginning balance at Dec. 31, 2024	$ 305,427			$ 37	429,657	(522)	(123,745)
Beginning balance, shares at Dec. 31, 2024	36,580,202			36,580,202
Stock-based compensation expense	$ 4,040				4,040
Issuance of common stock upon exercise of stock options	6				6
Issuance of common stock upon exercise of stock options, shares				3,240
Repurchase of unvested restricted common stock	(1)				(1)
Repurchase of unvested restricted common stock, shares				(86,008)
Net loss	(24,063)						(24,063)
Change in unrealized gain (loss) on investments, net of tax	427					427
Ending balance at Mar. 31, 2025	285,836			$ 37	433,702	(95)	(147,808)
Ending balance, shares at Mar. 31, 2025				36,497,434
Beginning balance at Dec. 31, 2024	$ 305,427			$ 37	429,657	(522)	(123,745)
Beginning balance, shares at Dec. 31, 2024	36,580,202			36,580,202
Issuance of common stock upon exercise of stock options, shares	3,483
Net loss	$ (50,795)
Change in unrealized gain (loss) on investments, net of tax	446
Ending balance at Jun. 30, 2025	$ 263,512			$ 37	438,091	(76)	(174,540)
Ending balance, shares at Jun. 30, 2025	36,497,677			36,497,677
Beginning balance at Mar. 31, 2025	$ 285,836			$ 37	433,702	(95)	(147,808)
Beginning balance, shares at Mar. 31, 2025				36,497,434
Stock-based compensation expense	4,389				4,389
Issuance of common stock upon exercise of stock options, shares				243
Net loss	(26,732)						(26,732)
Change in unrealized gain (loss) on investments, net of tax	19					19
Ending balance at Jun. 30, 2025	$ 263,512			$ 37	$ 438,091	$ (76)	$ (174,540)
Ending balance, shares at Jun. 30, 2025	36,497,677			36,497,677