Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net loss	$ (44,635)	$ (26,693)
Adjustments to reconcile net loss to net cash used in operations:
Stock-based compensation	2,161	2,278
Accretion of discounts on available-for-sale marketable securities	(2,110)	(280)
Depreciation and amortization expense	501	482
Impairment of capitalized software	648
Non-cash lease expense	704	526
Changes in assets and liabilities:
Prepaid expense and other current assets	(380)	(2,573)
Other non-current assets	(515)	(293)
Accounts payable	3,784	3,068
Accrued compensation	(1,804)	(1,449)
Other accrued expenses and current liabilities	(2,306)	(71)
Operating lease liability	(963)	(520)
Net cash used in operating activities	(44,915)	(25,525)
Cash flows from investing activities
Purchases of available-for-sale marketable securities	(81,122)	(145,336)
Proceeds from maturities of available-for-sale marketable securities	86,700	23,000
Purchases of property and equipment	0	(543)
Net cash provided by (used in) investing activities	5,578	(122,879)
Cash flows from financing activities
Proceeds from issuance of common stock upon initial public offering, net of underwriting commissions	0	341,171
Proceeds from exercise of common stock options	3	64
Principal paid on finance lease liabilities	(341)	(231)
Payments for offering costs	(76)	(2,955)
Net cash provided by (used in) financing activities	(414)	338,049
Net increase (decrease) in cash and cash equivalents and restricted cash	(39,751)	189,645
Cash, cash equivalents and restricted cash, at beginning of period	97,173	35,212
Cash, cash equivalents and restricted cash, at end of period	57,422	224,857
Reconciliation of cash, cash equivalents and restricted cash to statement of financial position
Cash and cash equivalents	56,865	224,287
Restricted cash	557	570
Cash, cash equivalents and restricted cash at end of period	57,422	224,857
Supplemental disclosure for non-cash investing and financing activities
Conversion of 114,556,997 shares of redeemable convertible preferred stock to common stock upon the closing of initial public offering	0	180,574
Unpaid deferred offering costs included in accounts payable and other accrued expenses and current liabilities	217	406
Purchases of property and equipment in accounts payable	0	89
Vesting of restricted stock	0	6
Right-of-use asset obtained in exchange for operating and finance lease liability	0	2,518
Supplemental disclosure of cash flow information
Cash paid for interest	$ 19	$ 44