Condensed Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Total	Series A-1	Series A-2	Series A -3	Series B	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Redeemable Convertible Preferred Stock Shares, Beginning Balance at Dec. 31, 2024		5,000,000	7,700,000	12,482,976	13,683,972
Redeemable Convertible Preferred Stock Value, Beginning Balance at Dec. 31, 2024		$ 6,530	$ 25,181	$ 43,730	$ 41,805
Beginning Balance, Shares at Dec. 31, 2024						1,019,195
Beginning Balance, Value at Dec. 31, 2024	$ (57,972)					$ 0	$ 1,473	$ 8	$ (59,453)
Issuance of common stock, Share						3,255
Issuance of common stock, Value	4						4
Issuance of Preferred Stock, Shares					13,522,143
Issuance of Preferred Stock, Value					$ 41,769
Stock-based compensation expense	51						51
Unrealized gain (loss) on marketable securities	(7)							(7)
Net loss	(9,394)								(9,394)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Mar. 31, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Ending Balance at Mar. 31, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Ending Balance, Share at Mar. 31, 2025						1,022,450
Ending Balance, Value at Mar. 31, 2025	(67,318)					$ 0	1,528	1	(68,847)
Redeemable Convertible Preferred Stock Shares, Beginning Balance at Dec. 31, 2024		5,000,000	7,700,000	12,482,976	13,683,972
Redeemable Convertible Preferred Stock Value, Beginning Balance at Dec. 31, 2024		$ 6,530	$ 25,181	$ 43,730	$ 41,805
Beginning Balance, Shares at Dec. 31, 2024						1,019,195
Beginning Balance, Value at Dec. 31, 2024	(57,972)					$ 0	1,473	8	(59,453)
Net loss	(25,582)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Sep. 30, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Ending Balance at Sep. 30, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Ending Balance, Share at Sep. 30, 2025						1,131,402
Ending Balance, Value at Sep. 30, 2025	(83,204)					$ 0	1,804	27	(85,035)
Redeemable Convertible Preferred Stock Shares, Beginning Balance at Mar. 31, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Beginning Balance at Mar. 31, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Beginning Balance, Shares at Mar. 31, 2025						1,022,450
Beginning Balance, Value at Mar. 31, 2025	(67,318)					$ 0	1,528	1	(68,847)
Issuance of common stock, Share						102,734
Issuance of common stock, Value	6						6
Vesting of early exercised shares	0
Stock-based compensation expense	132						132
Unrealized gain (loss) on marketable securities	(4)							(4)
Net loss	(8,328)								(8,328)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Jun. 30, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Ending Balance at Jun. 30, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Ending Balance, Share at Jun. 30, 2025						1,125,184
Ending Balance, Value at Jun. 30, 2025	(75,512)					$ 0	1,666	(3)	(77,175)
Issuance of common stock, Share						6,218
Issuance of common stock, Value	1						1
Vesting of early exercised shares	8						8
Stock-based compensation expense	129						129
Unrealized gain (loss) on marketable securities	30							30
Net loss	(7,860)								(7,860)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Sep. 30, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Ending Balance at Sep. 30, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Ending Balance, Share at Sep. 30, 2025						1,131,402
Ending Balance, Value at Sep. 30, 2025	(83,204)					$ 0	1,804	27	(85,035)
Redeemable Convertible Preferred Stock Shares, Beginning Balance at Dec. 31, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Beginning Balance at Dec. 31, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Beginning Balance, Shares at Dec. 31, 2025						1,285,835
Beginning Balance, Value at Dec. 31, 2025	(92,119)					$ 0	2,123	17	(94,259)
Issuance of common stock, Share						5,065
Issuance of common stock, Value	6						6
Vesting of early exercised shares	8						8
Issuance of Preferred Stock, Shares					16,182,795
Issuance of Preferred Stock, Value					$ 49,823
Stock-based compensation expense	161						161
Unrealized gain (loss) on marketable securities	(95)							(95)
Net loss	(16,223)								(16,223)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Mar. 31, 2026		5,000,000	7,700,000	12,482,976	43,388,910
Redeemable Convertible Preferred Stock Value, Ending Balance at Mar. 31, 2026		$ 6,530	$ 25,181	$ 43,730	$ 133,397
Ending Balance, Share at Mar. 31, 2026						1,290,900
Ending Balance, Value at Mar. 31, 2026	(108,262)					$ 0	2,298	(78)	(110,482)
Redeemable Convertible Preferred Stock Shares, Beginning Balance at Dec. 31, 2025		5,000,000	7,700,000	12,482,976	27,206,115
Redeemable Convertible Preferred Stock Value, Beginning Balance at Dec. 31, 2025		$ 6,530	$ 25,181	$ 43,730	$ 83,574
Beginning Balance, Shares at Dec. 31, 2025						1,285,835
Beginning Balance, Value at Dec. 31, 2025	(92,119)					$ 0	2,123	17	(94,259)
Net loss	(42,547)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Sep. 30, 2026		5,000,000	7,700,000	12,482,976	43,388,910
Redeemable Convertible Preferred Stock Value, Ending Balance at Sep. 30, 2026		$ 6,530	$ 25,181	$ 43,730	$ 133,397
Ending Balance, Share at Sep. 30, 2026						1,501,984
Ending Balance, Value at Sep. 30, 2026	(134,110)					$ 0	2,847	(151)	(136,806)
Redeemable Convertible Preferred Stock Shares, Beginning Balance at Mar. 31, 2026		5,000,000	7,700,000	12,482,976	43,388,910
Redeemable Convertible Preferred Stock Value, Beginning Balance at Mar. 31, 2026		$ 6,530	$ 25,181	$ 43,730	$ 133,397
Beginning Balance, Shares at Mar. 31, 2026						1,290,900
Beginning Balance, Value at Mar. 31, 2026	(108,262)					$ 0	2,298	(78)	(110,482)
Issuance of common stock, Share						79,231
Issuance of common stock, Value	14						14
Vesting of early exercised shares	10						10
Stock-based compensation expense	183						183
Unrealized gain (loss) on marketable securities	(70)							(70)
Net loss	(13,085)								(13,085)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Jun. 30, 2026		5,000,000	7,700,000	12,482,976	43,388,910
Redeemable Convertible Preferred Stock Value, Ending Balance at Jun. 30, 2026		$ 6,530	$ 25,181	$ 43,730	$ 133,397
Ending Balance, Share at Jun. 30, 2026						1,370,131
Ending Balance, Value at Jun. 30, 2026	(121,210)					$ 0	2,505	(148)	(123,567)
Issuance of common stock, Share						131,853
Issuance of common stock, Value	149						149
Vesting of early exercised shares	15						15
Stock-based compensation expense	178						178
Unrealized gain (loss) on marketable securities	(3)							(3)
Net loss	(13,239)								(13,239)
Redeemable Convertible Preferred Stock Shares, Ending Balance at Sep. 30, 2026		5,000,000	7,700,000	12,482,976	43,388,910
Redeemable Convertible Preferred Stock Value, Ending Balance at Sep. 30, 2026		$ 6,530	$ 25,181	$ 43,730	$ 133,397
Ending Balance, Share at Sep. 30, 2026						1,501,984
Ending Balance, Value at Sep. 30, 2026	$ (134,110)					$ 0	$ 2,847	$ (151)	$ (136,806)