Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
OPERATING ACTIVITIES
Net loss	$ (49,980)	$ (42,896)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	4,258	2,249
Depreciation expense	120	121
Loss on extinguishment of debt	250
Non-cash interest expense	987	4,573
Non-cash lease expense	3	2
Loss from changes in fair value on derivative liability and warrants	384	4,910
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,644)	(145)
Accounts payable	132	(1,705)
Accrued expenses and other current liabilities	2,419	719
Deferred grant income	(3,313)	3,313
Net cash used in operating activities	(46,384)	(28,859)
INVESTING ACTIVITIES
Purchase of property and equipment	(340)	(166)
Purchases of investments		(100)
Net cash used in investing activities	(340)	(266)
FINANCING ACTIVITIES
Proceeds from issuance of convertible notes		23,500
Proceeds from term loan		12,500
Proceeds from Series D issuance	170,000
Issuance costs paid on Series D issuance	(542)
Proceeds from initial public offering, net of underwriting discounts and commissions	184,140
Issuance costs paid on initial public offering and private placement	(3,268)
Proceeds from issuance of common shares through private placement, net of placement agent fees	9,858
Term loan principal payments	(4,500)
Proceeds from issuance of common shares upon stock option exercises	609
Net cash provided by financing activities	356,297	35,950
Effect of changes in exchange rate on cash, cash equivalents, and restricted cash	(56)	65
Net increase in cash, cash equivalents and restricted cash	309,517	6,890
Cash, cash equivalents and restricted cash at beginning of period	24,957	27,644
Cash, cash equivalents and restricted cash at end of period	334,474	34,534
Supplemental non-cash disclosure:
Unpaid equity issuance costs included in accounts payable and accrued expenses	1,249
Conversion of convertible promissory notes into Series D-1 redeemable convertible preferred stock	40,651
Conversion of redeemable convertible preferred stock into common stock upon initial public offering	342,831
Cash paid for interest	1,145	687
Right-of-use assets obtained in exchange for lease obligation	282	407
Convertible Notes
FINANCING ACTIVITIES
Issuance costs paid		(46)
Term Loan
FINANCING ACTIVITIES
Issuance costs paid		$ (4)