Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net loss	$ (9,810)	$ (24,022)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	124	49
Change in fair value of simple agreements for future equity	0	16,793
Accretion of discount on marketable debt securities	(312)	0
Stock-based compensation	2,311	667
Deferred income taxes	(4,734)	0
Change in operating assets and liabilities, net of effect of acquisition:
Prepaid and other current assets	336	(291)
Other assets	(17)	25
Accounts payable	(1,755)	(574)
Accrued expenses and other	1,606	73
Operating lease right-of-use assets and liabilities	8	(7)
Net cash used in operating activities	(12,243)	(7,287)
Cash flows from investing activities:
Purchases of property and equipment	(332)	(97)
Purchases of marketable debt securities	(29,887)	0
Proceeds from redemptions of marketable debt securities	37,183	0
Payment for acquisition of business, net of cash acquired	(900)	0
Net cash provided by (used in) investing activities:	6,064	(97)
Cash flows from financing activities:
Payment of taxes from common stock withheld	(1,595)	0
Proceeds from exercise of stock options	720	440
Proceeds from right of first refusal liability	0	25,000
Proceeds from simple agreements for future equity	0	10,232
Payment of deferred issuance costs	0	(137)
Net cash (used in) provided by financing activities	(875)	35,535
Net (decrease) increase in cash and cash equivalents	(7,054)	28,151
Cash and cash equivalents - beginning of period	97,132	9,868
Cash and cash equivalents - end of period	90,078	38,019
Supplemental noncash investing and financing activities:
Issuance of common stock in connection with acquisition of business	27,408	0
Assumed liabilities in connection with acquisition of business	287	0
Deferred issuance costs included in accrued expense and other	0	800
Reclassification of simple agreements for future equity in connection with business combination	$ 0	$ 204