CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED AND COMMON STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands		Total	Series A Convertible Preferred Stock	Series A-1 Convertible Preferred Stock	Series B Convertible Preferred Stock	Class B Convertible Common Stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance, temporary equity (in shares) at Dec. 31, 2023	[1]		21,977,282	2,950,548	28,019,181	2,744,184
Beginning balance, temporary equity at Dec. 31, 2023	[1]		$ 44,621	$ 9,893	$ 82,976	$ 5,900
Convertible Preferred and Common Stock
Conversion of convertible preferred stock and Class B convertible common stock to common stock as a result of the Merger and reset to par of $0.00001 (in shares)			(21,977,282)	(2,950,548)	28,019,181	(2,744,184)
Conversion of convertible preferred stock and Class B convertible common stock to common stock as a result of the Merger and reset to par of $0.00001 (in shares)			$ (44,621)	$ (9,893)	$ 82,976	$ (5,900)
Ending balance, temporary equity (in shares) at Mar. 31, 2024			0	0	0	0
Ending balance, temporary equity at Mar. 31, 2024			$ 0	$ 0	$ 0	$ 0
Beginning balance, common stock (in shares) at Dec. 31, 2023	[1]						1,969,360
Beginning balance at Dec. 31, 2023	[1]	$ (92,712)					$ 10	$ 2,517	$ (95,245)	$ 6
Stockholders' Deficit
Exercise of stock options and common warrants (in shares)							383,898
Exercise of stock options and common warrants		430						430
Unrealized loss on marketable securities		(7)								(7)
Vesting of early exercised stock options (in shares)							6,150
Vesting of early exercised stock options		10						10
Conversion of convertible preferred stock and Class B convertible common stock to common stock as a result of the Merger and reset to par of $0.00001 (in shares)							11,260,672
Conversion of convertible preferred stock and Class B convertible common stock to common stock as a result of the Merger and reset to par of $0.00001		143,390					$ (10)	143,400
Issuance of common stock to Graphite stockholders as a result of the Merger (in shares)							8,320,485
Issuance of common stock to Graphite stockholders as a result of the Merger		116,145						116,145
Issuance of common stock from private placement, net (in shares)							3,559,565
Issuance of common stock from private placement, net		49,840						49,840
Reclassification of warrant liability to equity		1,918						1,918
Merger transaction costs		(5,146)						(5,146)
Share-based compensation		947						947
Net loss		(16,648)							(16,648)
Ending balance, common stock (in shares) at Mar. 31, 2024							25,500,130
Ending balance at Mar. 31, 2024		$ 198,167					$ 0	310,061	(111,893)	(1)
Beginning balance, temporary equity (in shares) at Mar. 20, 2024			21,977,282	2,950,548
Stockholders' Deficit
Issuance of common stock to Graphite stockholders as a result of the Merger (in shares)		8,320,485
Issuance of common stock from private placement, net (in shares)		8,670,653
Merger transaction costs		$ (5,200)
Beginning balance, common stock (in shares) at Dec. 31, 2024		27,518,439					27,518,439
Beginning balance at Dec. 31, 2024		$ 204,084					$ 1	348,901	(145,014)	196
Stockholders' Deficit
Exercise of stock options and common warrants (in shares)							11,630
Exercise of stock options and common warrants		44						44
Unrealized loss on marketable securities		(73)								(73)
Vesting of early exercised stock options (in shares)							5,594
Vesting of early exercised stock options		19						19
Share-based compensation		2,555						2,555
Net loss		$ (14,619)							(14,619)
Ending balance, common stock (in shares) at Mar. 31, 2025		27,535,663					27,535,663
Ending balance at Mar. 31, 2025		$ 192,010					$ 1	$ 351,519	$ (159,633)	$ 123

[1] Retroactively recast for the reverse recapitalization as described in Note 3.