Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating activities:
Net loss	$ (20,311)	$ (13,963)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	628	587
Stock-based compensation	2,052	1,406
Change in fair value of SAFEs (including related party amounts of $0 and $217, respectively)		268
Accretion of discounts and amortization of premiums on investments, net	(723)	(368)
Changes in operating assets and liabilities:
Accounts receivable (including related party amounts of $0 and $(251), respectively)		215
Other receivables (including related party amounts of $(11) and $(79), respectively)	(88)	(180)
Prepaid expenses and other current assets	(750)	(936)
Other long-term assets	254	31
Accounts payable (including related party amounts of $(270) and $772, respectively)	41	851
Accrued expenses (including related party amounts of $(632) and $(1,896), respectively)	(931)	(3,042)
Operating lease right-of-use asset and lease liabilities, net	(13)	45
Net cash used in operating activities	(19,841)	(15,086)
Investing activities:
Purchases of property and equipment	(511)	(18)
Purchases of investments	(18,518)	(6,200)
Maturities of investments	29,000	16,000
Net cash provided by investing activities	9,971	9,782
Financing activities:
Proceeds from exercise of stock options	138
Proceeds from purchase of ESPP shares	134
Payments on finance leases	(33)
Net cash provided by financing activities	239
Net decrease in cash, cash equivalents and restricted cash	(9,631)	(5,304)
Cash, cash equivalents and restricted cash at beginning of period	40,493	53,762
Cash, cash equivalents and restricted cash at end of period	30,862	48,458
Reconciliation of cash, cash equivalents and restricted cash to the balance sheet:
Cash and cash equivalents	30,401	48,200
Restricted cash	461	258
Total cash, cash equivalents and restricted cash	30,862	48,458
Supplemental disclosures of noncash activities:
Right-of-use asset obtained in exchange for new operating lease liability	442
Property and equipment purchases in accounts payable and accrued expenses	$ 882	13
Deferred offering costs in accounts payable and accrued expenses		$ 286