Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities:
Net loss	$ (41,565)	$ (31,806)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	1,269	1,190
Stock-based compensation	3,601	2,889
Change in fair value of SAFEs (including related party amounts of $0 and $2,112, respectively)		2,620
Accretion of discounts and amortization of premiums on investments, net	(1,232)	(641)
Changes in operating assets and liabilities:
Accounts receivable		465
Other receivables (including related party amounts of $(30) and $(93), respectively)	116	(168)
Prepaid expenses and other current assets	(3,614)	(640)
Other long-term assets	229	62
Accounts payable (including related party amounts of $(271) and $24, respectively)	(168)	(103)
Accrued expenses (including related party amounts of $(715) and $(1,302), respectively)	(1,481)	(2,769)
Operating lease right-of-use asset and lease liabilities, net	21	130
Net cash used in operating activities	(42,824)	(28,771)
Investing activities:
Purchases of property and equipment	(1,566)	(482)
Purchases of investments	(24,591)	(18,387)
Maturities of investments	57,250	30,000
Net cash provided by investing activities	31,093	11,131
Financing activities:
Proceeds from exercise of stock options	138	22
Proceeds from purchase of ESPP shares	134
Payments to taxing authorities related to net-settlement of vested restricted stock units	(39)
Payments on finance leases	(66)	(78)
Cash paid in connection with deferred offering costs		(1,560)
Net cash provided by (used in) financing activities	167	(1,616)
Net decrease in cash, cash equivalents and restricted cash	(11,564)	(19,256)
Cash, cash equivalents and restricted cash at beginning of period	40,493	53,762
Cash, cash equivalents and restricted cash at end of period	28,929	34,506
Reconciliation of cash, cash equivalents and restricted cash to the balance sheet:
Cash and cash equivalents	28,468	34,248
Restricted cash	461	258
Total cash, cash equivalents and restricted cash	28,929	34,506
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	$ 283	33
Deferred offering costs in accounts payable and accrued expenses		1,280
Non-cash additions to financing leases		$ 241