CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities
Net loss	$ (29,531)	$ (26,902)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	55	23
Loss on impairment of operating right-of-use assets and related property and equipment	82	0
Accretion of discounts on marketable securities	(2,022)	(1,234)
Change in fair value of preferred stock warrants	0	1,047
Share-based compensation expense	5,400	2,544
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,196)	(399)
Accounts payable	(1,628)	(3,955)
Accrued liabilities	1,487	(9,479)
Other assets	(204)	(1,377)
Net cash used in operating activities	(27,557)	(39,732)
Cash flows from investing activities
Purchases of marketable securities	(91,385)	(111,257)
Proceeds from maturities of marketable securities	110,210	31,000
Purchases of property and equipment	(350)	(133)
Net cash provided by (used in) investing activities	18,475	(80,390)
Cash flows from financing activities
Proceeds from exercises of stock options	240	3,843
Proceeds from issuance of common stock under employee stock purchase plan	225	0
Cash, cash equivalents, and restricted cash acquired in connection with the Merger	0	117,824
Merger transaction costs	0	(2,360)
Net cash provided by financing activities	26,532	169,131
Net increase in cash, cash equivalents, and restricted cash	17,450	49,009
Cash and cash equivalents, and restricted cash, beginning of the period	20,272	35,140
Cash, cash equivalents, and restricted cash, end of the period	37,722	84,149
Supplemental cash flow information
Reclassification of warrant liability to equity	0	1,918
Prepaid expenses and other current assets assumed in the Merger	0	1,313
Accounts payable and accrued liabilities assumed in the Merger	0	2,950
Merger transaction costs included in accounts payable and accrued expenses	0	42
Right-of-use assets assumed in the Merger in exchange for operating lease liabilities	0	218
Right-of-use assets obtained in exchange for operating lease liabilities	0	1,218
Property and equipment included in accounts payable	225	0
At The Market Offerings
Cash flows from financing activities
Proceeds from issuance of common stock, net of issuance costs	26,067	0
Private Placement
Cash flows from financing activities
Proceeds from issuance of common stock, net of issuance costs	0	49,824
Series A, A-1, And B Convertible Preferred Stock To Common Stock
Supplemental cash flow information
Conversion of stock to common stock	0	137,490
Class B Convertible Common Stock To Common Stock
Supplemental cash flow information
Conversion of stock to common stock	$ 0	$ 5,900